Digital caliper GOST 166 89. Calipers. Specifications. Types. main parameters and dimensions

LAB #2

MEASURING THE PART DIMENSIONS WITH THE ABSOLUTE METHOD

Objective:

Disclosure of the concept of the absolute method of measurement;

Mastering the selection technique, measuring tool on
measurement accuracy;

The study of the design of calipers, caliper depth gauges and
micrometer, their metrological characteristics;

Acquiring the skill of using a caliper, shtvngen-
depth gauge and micrometer.

The concept of the absolute method of measurement

The measurement of linear dimensions is performed absolute and relative
telny methods.

With the absolute method, the measurement result is read
directly as shown measuring instrument. A distinctive feature of measuring instruments for absolute measurements is the presence of line measures (linear scales) with which the measured value is compared. The accuracy of measuring instruments for absolute measurements is limited by the accuracy of manufacturing scales.

The most common measuring instruments for
absolute measurements are calipers and micrometers
cal tools.

Device, technical characteristics and methodology

measurements with a caliper ShTs-II (GOST 166-80)

The caliper is designed to measure internal and
will violate the dimensions by the absolute method.

The device of the ShTs-II caliper (see Fig. 1) is shown in
rice. I. The caliper has two scales: the main one is on
bar 7, additional is located but vernier 9. Lower pair
sponges are used for external and internal measurements; top pair
pointed jaws are used for marking, as well as for
outdoor measurements.

The value of the vernier reading, mm - 0.05 or 01
Measurement error, mm + (0.05 or 0.1)

Change sequence. When measuring with a caliper
the measuring surfaces of the jaws are adjusted to the required size
by contact with the surface to be tested, checking with
this is the correctness of their position (the absence of distortions and the normality of the effort during movement), fix the frame 3, read the readings.

When measuring the outer dimensions, the part is compressed by the inner measuring surfaces of the lower nuboks.

When measuring internal dimensions, external measuring
the surfaces of the lower jaws are brought into contact with the walls of the hole. In this case, the thickness of the jaws indicated on them is added to the readings of the caliper.

verniers . 1. Nonius with a reading value of 0.05 mm. The length of the vernier is 39 mm, it is divided into 20 parts. The vernier division interval is 39:20=1.05 mm, i.e. 0.05 mm less than an integer ”The value C \u003d 0.05 mm and is the value of the vernier reading.

2. Nonius with a reading of 0.1 mm. The length of the vernier is
19 mm, it is divided into 10 parts. One division of the vernier is 19:10 » 1.9 mm i.e. 0.1 mm less than a whole number.
C=0.1 mm is the value of the vernier reading.
At zero reading, the vernier stroke is to the nearest
to the right of the stroke of the rod at a distance of 9 equal to the value of the reference
(0.05 or 0.1 mm) multiplied by the serial number of the vernier stroke, not counting the zero.

Reading readings on a caliper.

An integer number of millimeters is measured on the bar scale 7 from left to right with a vernier stroke. The fractional value is determined by multiplying the value of the vernier reading (0.05 or 0.1 mm) by the ordinal number of the vernier stroke (not counting the zero) that exactly matches the stroke of the rod. Thus, the reading of the measured value A on a scale with a vernier is the sum of the reading of whole divisions on the rod scale and the reading of the fractional part of the division on the vernier scale, i.e.

where A is the measured value;

N is an integer number of divisions of the rod scale, indicated by the zero stroke of the vernier;

K - the number of the vernier stroke (not counting the zero) exactly coinciding with any stroke of the rod scale;

C is the vernier reading value.

Examples of reading on a vernier caliper with verniers having
the reading value of 0.05 or 0.1 mm is shown in fig. 2.

Calipers ШЦ, ШЦК, ШЦЦ manufactured by YuUIZ "KALIBR" are included in the State Register of Measuring Instruments reg. No. 73659-18 in accordance with the order of the Federal Agency for Technical Regulation and Metrology No. 2769 dated December 27, 2018 "On approval of types of measuring instruments".

Caliper ШЦ with vernier reading GOST 166-89, TU 26.51.33-001-04567838-2018

Type ShTs-I - with double-sided arrangement of jaws, for measuring external and internal dimensions and for marking. ShTs-I calipers are equipped with a depth gauge for measuring depths and ledges.

Type ShTs-II - with two-sided arrangement of jaws, for measuring external and internal dimensions and for marking.

Type ShTs-III - with one-sided arrangement of jaws, for measuring external and internal dimensions.

Designation of caliper type 2 with measuring range 0-250, division value 0.05 when ordering: ШЦ-II-250-0.05

Specifications:

Caliper modification		Reference value vernier, mm
ShTs-I-125	from 0 to 125	0,02; 0,05; 0,1	-
ShTs-I-135	from 0 to 135	0,02; 0,05; 0,1	-
ShTs-I-150	from 0 to 150	0,02; 0,05; 0,1	-
ShTs-I-160	from 0 to 160	0,02; 0,05; 0,1	-
ShTs-I-200	from 0 to 200	0,02; 0,05; 0,1	-
ShTs-I-250	from 0 to 250	0,02; 0,05; 0,1	-
ShTs-I-300	from 0 to 300	0,02; 0,05; 0,1	-
ShTs-II-160	from 0 to 160	0,02; 0,05; 0,1	10
ShTs-II-200	from 0 to 200	0,02; 0,05; 0,1	10
ShTs-II-250	from 0 to 250	0,02; 0,05; 0,1	10
ShTs-II-300	from 0 to 300	0,02; 0,05; 0,1	10
ShTs-II-400	from 0 to 400	0,02; 0,05; 0,1	10; 20
ShTs-II-500	from 0 to 500	0,02; 0,05; 0,1	10; 20
ShTs-II-600	from 0 to 600	0,02; 0,05; 0,1	10; 20; 30
ShTs-II-800	from 0 to 800	0,02; 0,05; 0,1	10; 20; 30
ShTs-II-1000	from 0 to 1000	0,02; 0,05; 0,1	10; 20; 30
ShTs-II-1250	from 0 to 1250	0,02; 0,05; 0,1	20; 30
ShTs-II-1500	from 0 to 1500	0,02; 0,05; 0,1	20; 30
ShTs-II-1600	from 0 to 1600	0,02; 0,05; 0,1	20; 30
ShTs-II-2000	from 0 to 2000	0,02; 0,05; 0,1	20; 30
ShTs-II-2500	from 0 to 2500	0,02; 0,05; 0,1	20; 30
ShTs-II-3000	from 0 to 3000	0,02; 0,05; 0,1	20; 30
ShTs-II-3500	from 0 to 3500	0,02; 0,05; 0,1	20; 30; 40
ShTs-II-4000	from 0 to 4000	0,02; 0,05; 0,1	20; 30; 40
ShTs-II-5000	from 0 to 5000	0,02; 0,05; 0,1	20; 30; 40
ShTs-II-630(250)	from 250 to 630	0,02; 0,05; 0,1	10; 20
ShTs-II-800(250)	from 250 to 800	0,02; 0,05; 0,1	10; 20
ShTs-II-1000(320)	from 320 to 1000	0,02; 0,05; 0,1	10; 20; 30
ShTs-II-1250(500)	from 500 to 1250	0,02; 0,05; 0,1	10; 20; 30
ShTs-II-1600(500)	from 500 to 1600	0,02; 0,05; 0,1	10; 20; 30
ShTs-II-2000(800)	from 800 to 2000	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-160	from 0 to 160	0,02; 0,05; 0,1	10
ShTs-III-200	from 0 to 200	0,02; 0,05; 0,1	10
ShTs-III-250	from 0 to 250	0,02; 0,05; 0,1	10
ShTs-III-300	from 0 to 300	0,02; 0,05; 0,1	10
ShTs-III-400	from 0 to 400	0,02; 0,05; 0,1	10; 20
ShTs-III-500	from 0 to 500	0,02; 0,05; 0,1	10; 20
ShTs-III-600	from 0 to 600	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-800	from 0 to 800	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-1000	from 0 to 1000	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-1250	from 0 to 1250	0,02; 0,05; 0,1	20; 30
ShTs-III-1500	from 0 to 1500	0,02; 0,05; 0,1	20; 30
ShTs-III-1600	from 0 to 1600	0,02; 0,05; 0,1	20; 30
ShTs-III-2000	from 0 to 2000	0,02; 0,05; 0,1	20; 30
ShTs-III-2500	from 0 to 2500	0,02; 0,05; 0,1	20; 30
ShTs-III-3000	from 0 to 3000	0,02; 0,05; 0,1	20; 30
ShTs-III-3500	from 0 to 3500	0,02; 0,05; 0,1	20; 30; 40
ShTs-III-4000	from 0 to 4000	0,02; 0,05; 0,1	20; 30; 40
ShTs-III-5000	from 0 to 5000	0,02; 0,05; 0,1	20; 30; 40
ShTs-III-630(250)	from 250 to 630	0,02; 0,05; 0,1	10; 20
ShTs-III-800(250)	from 250 to 800	0,02; 0,05; 0,1	10; 20
ShTs-III-1000(320)	from 320 to 1000	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-1250(500)	from 500 to 1250	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-1600(500)	from 500 to 1600	0,02; 0,05; 0,1	10; 20; 30
ShTs-III-2000(800)	from 800 to 2000	0,02; 0,05; 0,1	10; 20; 30

ShTsK caliper with dial GOST 166-89, TU 26.51.33-001-04567838-2018

Caliper model ШЦК with a reading on a circular arrow indicator is intended for internal and external measurements of thicknesses, as well as for measuring depth. The caliper is used for absolute measurements that do not require high accuracy. It is allowed to equip SCC calipers with accessories or auxiliary measuring surfaces to expand functionality. External dimensions are measured using the lower jaws. Upper jaws are used to measure internal dimensions. For marking work, the upper and lower jaws are used. Sponge length is standard.

The indicator scale allows you to adjust the zero setting, control tolerances. It has outer jaws for measuring outer dimensions and inner jaws for measuring internal ones, as well as a built-in depth gauge. The fixed bar and the movable frame are made of hardened steel. The strokes of the divisions on the bar stand out in contrast against its matte surface. The scale was calibrated with a laser. Made from carbon and stainless steel. Hardness of measuring surfaces of tool and structural steel. The caliper has a scale printed on the rod with graduations and the pointer-type reading device is driven by a gear mechanism. The arrow on the dial counts fractions of a millimeter, i.e. The caliper reading is made up of reading integer values on the rod scale and fractional values according to the readings of the dial indicator of the caliper. Smooth movement of the frame is provided by a spring located inside the frame.

Specifications:

Caliper modification	Measurement range of external dimensions, mm	Reference value on a circular scale, mm
ShCK-I-125	from 0 to 125	0,01; 0,02; 0,05; 0,1
ShCK-I-135	from 0 to 135	0,01; 0,02; 0,05; 0,1
ShCK-I-150	from 0 to 150	0,01; 0,02; 0,05; 0,1
ShCK-I-160	from 0 to 160	0,01; 0,02; 0,05; 0,1
ShCK-I-200	from 0 to 200	0,01; 0,02; 0,05; 0,1
ShCK-I-250	from 0 to 250	0,01; 0,02; 0,05; 0,1
ShCK-I-300	from 0 to 300	0,01; 0,02; 0,05; 0,1

ShTsTs caliper with digital reporting device GOST 166-89, TU 26.51.33-001-04567838-2018

The ShTsTs caliper has a digital reading device and is intended for measuring external and internal dimensions.

Details of SCC calipers are made of corrosion-resistant steel or have a reliable anti-corrosion coating.

Calipers are manufactured in three types:
I - double-sided with a depth gauge;
II - bilateral;
III - unilateral.

SCC Features:
- setting the origin in the absolute coordinate system;
- issuance of digital information in a direct code (with indication of the sign and absolute value);
- preliminary zero setting;
- output of measurement results to external devices (via digital interface RS232);
- Possibility of measurement both in millimeters and inches.

Designation of caliper ShTsTs type II with a measurement range from 0 to 400 mm and a readout step of 0.01 mm: ShTsTs-II-400-0.01 caliper

Specifications:

Caliper modification	Measurement range of external dimensions, mm	Discrete step of digital readout device, mm	The size of the sponges shifted to contact with cylindrical surfaces, (g) mm
ШЦЦ-I-125	from 0 to 125	0,01	-
ShTsTs-I-135	from 0 to 135	0,01	-
ShTsTs-I-150	from 0 to 150	0,01	-
ШЦЦ-I-160	from 0 to 160	0,01	-
ShTsTs-I-200	from 0 to 200	0,01	-
ШЦЦ-I-250	from 0 to 250	0,01	-
ShTsTs-I-300	from 0 to 300	0,01	-
ShTsTs-II-160	from 0 to 160	0,01	10
ShTsTs-II-200	from 0 to 200	0,01	10
ShTsTs-II-250	from 0 to 250	0,01	10
ShTsTs-II-300	from 0 to 300	0,01	10
ShTsTs-II-400	from 0 to 400	0,01	10; 20
ShTsTs-II-500	from 0 to 500	0,01	10; 20
ShTsTs-II-600	from 0 to 600	0,01	10; 20; 30
ShTsTs-II-800	from 0 to 800	0,01	10; 20; 30
ШЦЦ-II-1000	from 0 to 1000	0,01	10; 20; 30
ШЦЦ-II-1250	from 0 to 1250	0,01	20; 30
ShTsTs-II-1500	from 0 to 1500	0,01	20; 30
ShTsTs-II-1600	from 0 to 1600	0,01	20; 30
SCC-II-2000	from 0 to 2000	0,01	20; 30
ShTsTs-II-2500	from 0 to 2500	0,01	20; 30
ShTsTs-II-3000	from 0 to 3000	0,01	20; 30
ShTsTs-II-3500	from 0 to 3500	0,01	20; 30; 40
ШЦЦ-II-4000	from 0 to 4000	0,01	20; 30; 40
ШЦЦ-II-5000	from 0 to 5000	0,01	20; 30; 40
ШЦЦ-III-160	from 0 to 160	0,01	10
ШЦЦ-III-200	from 0 to 200	0,01	10
SCC-III-250	from 0 to 250	0,01	10
ШЦЦ-III-300	from 0 to 300	0,01	10
SCC-III-400	from 0 to 400	0,01	10; 20
ShTsTs-III-500	from 0 to 500	0,01	10; 20
ShTsTs-III-600	from 0 to 600	0,01	10; 20; 30
ShTsTs-III-800	from 0 to 800	0,01	10; 20; 30
ШЦЦ-III-1000	from 0 to 1000	0,01	10; 20; 30
ШЦЦ-III-1250	from 0 to 1250	0,01	20; 30
SCC-III-1500	from 0 to 1500	0,01	20; 30
SCC-III-1600	from 0 to 1600	0,01	20; 30
SCC-III-2000	from 0 to 2000	0,01	20; 30
ШЦЦ-III-2500	from 0 to 2500	0,01	20; 30
SCC-III-3000	from 0 to 3000	0,01	20; 30
SCC-III-3500	from 0 to 3500	0,01	20; 30; 40
SCC-III-4000	from 0 to 4000	0,01	20; 30; 40
SCC-III-5000	from 0 to 5000	0,01	20; 30; 40

To purchase products, please contact the sales department
by phone

GOST 166-89
(ISO 3599-76)

Group P53

INTERSTATE STANDARD

calipers

Specifications

Vernier callipers. Specifications

ISS 17.040.30
OKP 39 3310

Introduction date 1991-01-01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Machine Tool and Tool Industry

PERFORMERS

M.B.Shabalina, Ph.D. tech. sciences (topic leader);

N.V. Semenova

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Product Quality Management and Standards dated October 30, 1989 N 3253

3. REPLACE GOST 166-80

4. The standard fully complies with ST SEV 704-77 - ST SEV 707-77, ST SEV 1309-78, ISO 3599-76

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS


	Item number
GOST 2.601-95
GOST 8.001-80
GOST 8.113-85
GOST 8.383-80
GOST 9.014-78
GOST 9.032-74
GOST 9.303-84
GOST 27.410-87*
GOST 2789-73
GOST 3882-74
GOST 13762-86	2.26.3; 2.27.2; 5
MI 1384-86

________________
* Within the territory of Russian Federation the document is not valid. GOST R 27.403-2009 is valid. - .

6. The limitation of the validity period was removed by the Decree of the State Standard of October 12, 1992 N 1353

7. EDITION (August 2003) with Amendments No. 1, 2, approved in July 1990, October 1992 (IUS 11-90, 1-93)

This standard applies to calipers designed to measure external and internal dimensions up to 2000 mm, as well as special-purpose calipers for measuring grooves on external and internal surfaces, grooves, distances between the axes of small diameter holes and pipe walls.

The requirements of this standard are mandatory.

1. TYPES, MAIN PARAMETERS AND DIMENSIONS

1.1. Calipers should be made of the following main types:

I - double-sided with a depth gauge (Fig. 1);

T-1 - one-sided with a depth gauge with measuring surfaces made of hard alloys (Fig. 2);

II - double-sided (Fig. 3);

III - one-sided (Fig. 4).

Note. It is allowed to equip calipers with devices or auxiliary measuring surfaces to expand the functionality (measuring heights, ledges, etc.).

1 - rod; 2 - frame; 3 - clamping element; 4 - nonius; 5 6 - depth gauge; 7 - jaws with edge measuring surfaces for measuring internal dimensions; 8 9 - rod scale

1 - rod; 2 - frame; 3 - clamping element; 4 - nonius; 5 - working surface rods; 6 - depth gauge; 7 - sponges with flat measuring surfaces for measuring outer dimensions; 8 - rod scale

1 - rod; 2 - frame; 3 - clamping element; 4 - nonius; 5 - the working surface of the rod; 6 - device for fine installation of the frame; 7 - jaws with edge measuring surfaces for measuring outer dimensions; 8 - sponges with flat and cylindrical measuring surfaces for measuring external and internal dimensions, respectively; 9 - rod scale

1 - rod; 2 - frame; 3 - clamping element; 4 - nonius; 5 - the working surface of the rod; 6 - sponges with flat measuring surfaces for measuring outer dimensions; 7 - jaws with cylindrical measuring surfaces for measuring internal dimensions; 8 - rod scale

(Changed edition, Rev. N 1).

1.2. Calipers should be made with a vernier reading (ShTs) (Fig. 1-4) or with a circular scale reading (ShTsK) (Fig. 5), or with a digital reading device (ShTsTs) (Fig. 6).

1 - circular scale of the reading device; 2 - rod; 3 - frame; 4 - rod scale

1 - digital reading device; 2 - rod; 3 - frame

Note. Fig. 1-6 do not define the design of calipers.

1.3. The measurement range, the value of the vernier reading, the division value of the circular scale and the discrete step of the digital reading device of calipers must correspond to those indicated in Table 1.

Table 1


Measuring range of calipers	The value of the vernier reading	The value of division of the circular scale of the reading device	Discrete step of digital readout device















Notes: 1. The lower limit of measurement for calipers with an upper limit of up to 400 mm is set for measuring external dimensions. 2. For calipers type T-I The measuring range only applies to outside and depth measurements. 3. The upper limit of measurement of calipers types I and T-I must be no more than 300 mm. 4. It is allowed to manufacture vernier calipers with separate verniers or scales for measuring external and internal dimensions. 5. It is allowed to manufacture Type III calipers with surfaces for measuring external dimensions of hard alloy. (Hard alloy according to GOST 3882).

An example of a type II caliper symbol with a measuring range of 0-250 mm and a vernier reading of 0.05 mm:

Caliper ШЦ-II-250-0.05 GOST 166-89

The same, type II caliper with a measuring range of 250-630 mm and a vernier reading of 0.1 mm, accuracy class 1:

Caliper ШЦ-II-250-630-0.1-1 GOST 166-89

The same, type I caliper with a measuring range of 0-150 mm with a division value of the circular scale of 0.02 mm:

Caliper ShTsK-I-150-0.02 GOST 166-89

The same, type I caliper with a measuring range of 0-125 mm with a resolution step of a digital reading device of 0.01 mm:

Caliper ШЦЦ-I-125-0.01 GOST 166-89

1.4. Calipers of types II and III, equipped with a marking device, should be equipped with a device for fine setting the frame (Fig. 3).

To fine-tune the frame, it is allowed to use a micrometric feed.

1.5. Departure of jaws both for measuring external dimensions and departure of jaws and for measuring internal dimensions must correspond to those indicated in Table 2 (Fig. 1-4).

table 2


Range measurements
			at least

1.6. Calipers of types II and III with jaws for measuring internal dimensions must have a cylindrical measuring surface with a radius of not more than half the total thickness of the jaws (no more than ).

For calipers with a measurement limit of up to 400 mm, the size (Fig. 3-4) should not exceed 10 mm, and for calipers with an upper measurement limit of more than 400 mm - 20 mm.

1.7. The length of the vernier should be chosen from the range: 9; 19; 39 mm - with a vernier reading value of 0.1 mm, 19; 30 mm - with a vernier reading value of 0.05 mm.

Long vernier strokes are allowed to be marked with whole numbers.

1.8. Calipers with a digital reading device must ensure the performance of functions that characterize the degree of automation in accordance with the list (according to the application).

1.9. Digital calipers must be powered from the built-in power supply.

Vernier calipers with measurement results output to an external device must be powered from the built-in power source and (or) from a general-purpose network through a power supply unit.

(Changed edition, Rev. N 2).

1.10. The design of calipers with a digital reading device must ensure the correctness of the readings at the highest allowable speed frame movement not less than 0.5 m/s.

1.11. (Deleted, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Calipers should be manufactured in accordance with the requirements of this standard according to working drawings approved in the prescribed manner.

2.2. Calipers with a vernier reading value of 0.1 mm and an upper measurement limit of up to 400 mm and calipers with a circular scale reading with a division value of 0.1 mm should be made in two accuracy classes: 1 and 2.

2.3. Limit of permissible error of calipers at temperature environment(20 ± 5) °С must correspond to that indicated in Table 3.

2.4. The limit of permissible error for calipers of types I and T-I when measuring a depth of 20 mm must comply with Table 3.

Table 3


Measured length	Limit of error of calipers (±)
	with vernier reading value	with the division value of the circular scale of the reading device	with digital readout step
		0.1 for accuracy class		0.1 for accuracy class


St. 100 to 200




" 800 " 1000
" 1000 " 1100
" 1100 " 1200
" 1200 " 1300
" 1300 " 1400
" 1400 " 1500
" 1500 " 2000
Notes: 1. For the measured length, take the nominal distance between the measuring surfaces of the jaws. 2. For vernier calipers with one vernier, the error is checked using jaws for measuring outer dimensions. 3. When shifting the jaws of the calipers until they touch, the shift of the zero stroke of the vernier is allowed only in the direction of increasing the size. 4. The error of the caliper should not exceed the values indicated in Table 3 at a temperature of (20 ± 10) ° C when checking them against plane-parallel gauge blocks made of steel.

2.5. The tolerance of flatness and straightness of the measuring surfaces should be 0.01 mm per 100 mm of the length of the longer side of the measuring surface of the calipers.

In this case, the permissible deviations of the flatness and straightness of the measuring surfaces must be:

0.004 mm - for vernier calipers with a vernier reading value, with a scale division value and a discrete step of not more than 0.05 mm and a length of the larger side of the measuring surface of less than 40 mm;

0.007 mm - for vernier calipers with a vernier reading value and with a scale division value of 0.1 mm and the length of the larger side of the measuring surface is less than 70 mm.

The straightness tolerance of the end of the rod of calipers types I and T-I must be 0.01 mm.

Blockages are allowed along the edges of flat measuring surfaces in a zone with a width of not more than 0.2 mm.

Note. Flatness requirements apply only to surfaces with a width of more than 4 mm.

(Changed edition, Rev. N 1, 2).

2.6. The tolerance of parallelism of the measuring surfaces of the jaws for measuring internal dimensions should be 0.010 mm and along the entire length. For calipers of the 2nd accuracy class, the measuring surfaces of the edge jaws can be manufactured with a parallelism tolerance of 0.02 mm.

Blockages are allowed in the zone up to 0.5 mm from the upper edge of the measuring surfaces.

The parallelism tolerance per 100 mm length of the flat measuring surfaces of the jaws for measuring outer dimensions must be:

0.02 mm - with a vernier reading value, a scale division value and a discrete step of not more than 0.05 mm;

0.03 mm - with a vernier reading value and a scale division value of 0.1 mm.

2.7. The backlash of the micrometric pair of the device for fine setting of the frame should not exceed a turn.

2.8. Deviations in the size of jaws with cylindrical measuring surfaces for measuring internal dimensions should not exceed: () mm at a division value or a vernier reading value of at least 0.05 mm; () mm at a division price or a discrete step of less than 0.05 mm.

2.9. The frame should not move along the rod under the action of its own weight with the vertical position of the caliper.

2.10. The force of moving the frame along the rod should be no more than the values \u200b\u200bspecified in Table 4.

Table 4

2.11. Requirements for the scale of the rod and vernier

2.11.1 The location of the plane of the vernier scale relative to the plane of the rod scale is indicated in Fig. 7.

2.11.2. The distance from the upper edge of the edge of the vernier to the surface of the rod scale should not exceed 0.25 mm for calipers with a reading value of 0.05 and 0.30 mm for calipers with a reading value of 0.1 mm.

2.11.3. The stroke sizes of the rod and vernier scales must correspond to the following:

stroke width 0.08-0.20 mm;

the difference in the width of the strokes within the same scale (for the scale of the rod at a distance of more than 0.3 mm from the edge of the scale) and the strokes of the scales of the rod and the vernier of one vernier caliper is not more than 0.03 mm with a vernier reading of 0.05 mm; 0.05 mm with a vernier reading of 0.1 mm.

(Changed edition, Rev. N 2).

2.12. Requirements for the dial of the reading device

2.12.1. The length of the scale division must be at least 1 mm.

2.12.2. The width of the scale strokes is 0.15-0.25 mm. The difference in the width of the corresponding strokes within the same scale should be no more than 0.05 mm.

2.12.3. The width of the arrow above the scale divisions should be 0.15-0.20 mm. The end of the arrow should overlap short strokes by no more than 0.8 of their length. The distance between the end of the hand and the dial should not exceed 0.7 mm for a scale with a division value of not more than 0.05 mm and 1.0 mm with a division value of 0.1 mm.

2.12.4. The reading device must provide the ability to align the arrow with the zero division of the circular scale.

2.13. For calipers with a digital reading device, the height of the digits of the reading device must be at least 4 mm.

2.14. Calipers with a digital reading device can additionally be equipped with an interface for outputting the measurement result to an external device.

2.15. The hardness of the measuring surfaces of calipers must be: made of tool and structural steel - at least 59;

from high-alloy steel - not less than 51.5.

Note. For type I calipers with an upper measurement limit up to 160 mm, made of tool or structural steels, the hardness of the measuring surfaces must be at least 53.

2.16. The roughness parameter of flat and cylindrical measuring surfaces of calipers is 0.32 µm according to GOST 2789;

measuring surfaces of edge jaws and flat auxiliary measuring surfaces - 0.63 microns according to GOST 2789.

2.17. The outer surfaces of the calipers must be coated or treated in accordance with Table 5.

Table 5


Surface name	Upper limit of measurement, mm	Type of treatment or coating steel calipers
		highly alloyed	instrumental and structural
Rod (except scale and end face), jaws, caliper frame, microfeed frame, except for measuring and adjacent surfaces			Chrome plating
Barbell and vernier scale		Matte coating	Chrome plating matte
			Chrome plating
	St. 630 to 2000		Chrome plating
Note. It is allowed to use other metallic and non-metallic coatings in accordance with GOST 9.303 and GOST 9.032, according to protective and decorative properties that are not inferior to those indicated in Table 5. Calipers with an upper measurement limit of more than 1000 mm are allowed not to be chrome-plated.

2.16, 2.17. (Changed edition, Rev. N 1).

2.18. Calipers must be demagnetized.

2.19. (Deleted, Rev. N 2).

2.20. (Excluded, Rev. N 1).

2.21-2.24. (Excluded, Rev. N 2).

2.25. Completeness

2.25.1. Each caliper must be accompanied by operational documentation in accordance with GOST 2.601*.
________________
* On the territory of the Russian Federation, GOST 2.601-2006 applies. - .

2.25.2. At the request of the consumer, calipers of types II and III are equipped with a marking device.

2.26. Marking

2.26.1. Each caliper must bear:

trademark of the manufacturer;

serial number according to the numbering system of the manufacturer;

conditional designation of the year of issue;

vernier reading value or division value;

size (for calipers types II and III with one vernier or one scale, fig. 3-4) on one of the jaws;

accuracy class 2 (for vernier calipers with a vernier reading value or a scale division value of 0.1 mm);

the word "Int." on a scale for measuring internal dimensions.

(Changed edition, Rev. N 2).

2.26.2. It is allowed not to indicate the serial number in the operational documentation.

2.26.3. Marking on the case - in accordance with GOST 13762.

The name or symbol of the caliper is applied only on the hard case.

2.27. Package

2.27.1. Methods and means for degreasing and conservation of calipers - according to GOST 9.014.

2.27.2. Calipers must be packed in cases made of materials in accordance with GOST 13762. Soft packaging is allowed for vernier calipers with an upper limit of up to 630 mm inclusive.

2.27.3. Calipers with a measurement limit of more than 400 mm when transported in containers may be packed in cases without shipping containers.

When packing without a transport container, the cases with calipers must be fixed so that they cannot be moved.

3. ACCEPTANCE

3.1. To verify the compliance of calipers with the requirements of this standard, state tests, acceptance control, periodic tests should be carried out.

(Changed edition, Rev. N 2).

3.2. State tests - according to GOST 8.383* and GOST 8.001*.
________________
* PR 50.2.009-94** applies on the territory of the Russian Federation.
** The document is not valid on the territory of the Russian Federation. The procedure for testing standard samples or measuring instruments for the purpose of type approval, the procedure for approving the type of standard samples or the type of measuring instruments, the procedure for issuing certificates of approval of the type of standard samples or the type of measuring instruments, establishing and changing the validity period of these certificates and the interval between verification of measuring instruments , Requirements for approval marks for the type of standard samples or the type of measuring instruments and the procedure for their application, approved by order of the Ministry of Industry and Trade of Russia dated November 30, 2009 N 1081. - .

Checking the errors of calipers at a temperature of (20 ± 10) ° C is carried out only during state tests.

3.3. During acceptance control, each caliper is checked for compliance with the requirements of paragraphs 1.3; 1.4; 1.6; 1.8; 2.3-2.10; 2.12.4; 2.16; 2.18; 2.25; 2.26.

3.4. Periodic tests are carried out at least once every 3 years on at least 3 calipers of each size from among those that have passed acceptance control for compliance with all the requirements of this standard.

The test results are considered satisfactory if all samples meet all the requirements being tested.

(Changed edition, Rev. N 2).

3.5. (Deleted, Rev. N 2).

4. CONTROL AND TEST METHODS

4.1. Verification of calipers - according to GOST 8.113 and MI 1384.

4.2. When determining the effect of transport shaking, an impact stand is used that creates shaking with an acceleration of 30 m/s at a frequency of 80-120 beats per minute.

Calipers in the package are attached to the stand and tested with a total number of impacts of 15000. After testing, the error of the calipers should not exceed the values \u200b\u200bspecified in Table 3.

It is allowed to test calipers by transporting them on a truck at a speed of 20-40 km/h for a distance of at least 100 km along a dirt road.

4.3. The impact of environmental climatic factors during transportation is determined in climatic chambers in the following modes: at a temperature of minus (50±3) °С, plus (50±3) °С and at a humidity of (95±3)%. Exposure in the climatic chamber for each of the three types of tests is 2 hours. After the tests, the error of the calipers should not exceed the values indicated in Table 3.

It is allowed after exposure of calipers in each mode to withstand it in normal conditions within 2 hours

5. TRANSPORT AND STORAGE

Transportation and storage - according to GOST 13762.

6. INSTRUCTIONS FOR USE

Calipers are allowed to operate at an ambient temperature of 10 to 40 °C and relative humidity - no more than 80% at a temperature of 25 °C.

7. MANUFACTURER WARRANTY

The manufacturer guarantees the compliance of calipers with the requirements of this standard subject to the conditions of transportation, storage and operation.

The warranty period for calipers is 12 months from the date of commissioning, for calipers equipped with hard alloy - 18 months, and when sold through a retail network - 12 months from the date of sale.

APPENDIX (mandatory). LIST OF FUNCTIONS CHARACTERIZING THE DEGREE OF AUTOMATION

APPENDIX
Mandatory

1. Issuance of digital information in a direct code (with indication of the sign and absolute value).

2. Setting the origin in the absolute coordinate system.

3. Memorization of the measurement result*.
________________
* By order of the consumer.

4. Clearing the memory with restoring the current measurement result*.
________________
* By order of the consumer.

5. Output of measurement results to an external device*.
________________
* By order of the consumer.

6. Zero preset.

7. Number presetting (constant entry)*.
________________
* By order of the consumer.

8. Comparison of measurement results with threshold limits*.
________________
* By order of the consumer.

9. Arithmetic operations with measurement results and constants*.
________________
* By order of the consumer.

Electronic text of the document
and verified by:
official publication
M.: IPK Standards Publishing House, 2003

STATE STANDARD OF THE UNION OF THE SSR

calipers

(ST SEV 704-77¸ ST SEV 707-77; ST SEV 1309-78, ISO 3599-76)

USSR STATE COMMITTEE FOR PRODUCT QUALITY MANAGEMENT AND STANDARDS

STATE STANDARD OF THE UNION OF THE SSR

Validity from 04.01.91

until 01.01.96

Non-compliance with the standard is punishable by law

The requirements of this standard are mandatory.

1. TYPES. MAIN PARAMETERS AND DIMENSIONS

1.1. Calipers should be made of the following main types:

I - double-sided with a depth gauge (Fig. 1);

T-1-one-sided with a depth gauge with measuring surfaces made of hard alloys (Fig. 2);

II-double-sided (Fig. 3);

III - one-sided (device 4).

Note. It is allowed to equip calipers with devices or auxiliary measuring surfaces to expand the functionality (measurement of heights, yielding, etc.).

1 - rod; 2 - frame; 3-clamping element; 4 - vernier; 5-working surface of the rod; 6 - depth gauge; 7 jaws with edge measuring surfaces for measuring internal dimensions; 8 jaws with flat measuring surfaces for measuring outer dimensions; 9-barbell scale.

Damn 1

1 - rod; 2 - frame; 3-clamping element; 4 - vernier; 5-working surface of the rod; 6 - depth gauge; 7-jaws with flat measuring surfaces for measuring outer dimensions; 8-scale rod.

Damn 2

1 - rod; 2 - frame; 3-clamping element; 4 - vernier; 5-working surface of the rod; 6-device fine installation of the frame; 7 jaws with edge measuring surfaces for measuring outer dimensions; 8 jaws with flat and cylindrical measuring surfaces for measuring external and internal dimensions, respectively; 9-barbell scale.

Damn 3

1 - rod; 2 - frame; 3-clamping element; 4 - vernier; 5-working surface of the rod; 6 jaws with flat measuring surfaces for measuring external dimensions; 7-jaws with cylindrical measuring surfaces for measuring internal dimensions; 8-scale rod.

Heck. 4

1.2. The caliper should be made with a vernier reading (SHTs) (Fig. 1-4) or with a circular scale reading (SHIK) (Fig. 5), or with a digital reading device (ShTsTs) (Fig. 6).

1-circular scale of the reading device; 1-digital reading device; 2-

2 - rod; 3 - frame; 4 - rod scale. barbell; 3 - frame.

Damn 5 Damn 6

Note Figures 1-6 do not define the design of calipers.

Table 1

Measuring range of calipers	The value of the vernier reading	The value of division of the circular scale of the reading device	Discrete step of digital readout device

Notes:

1. The lower limit of measurement for calipers with an upper limit of up to 400mm is set for measuring external dimensions.

2. For calipers type T-1, the measurement range applies only to measurements of external dimensions and depth.

3 The upper limit of measurement of calipers types I and T-1 should be no more than 300 mm .

4. It is allowed to manufacture vernier calipers with separate verniers or scales for measuring external and internal dimensions.

5. It is allowed to manufacture type III calipers with surfaces for measuring external dimensions from hard alloy (Hard alloy according to GOST 5882)

Symbol exampleType II caliper with measuring range 0-250 mm and vernier reading 0.05 mm:

Caliper ШЦ- II-250-0.05 GOST 166

Same type caliper I I with measuring range 250-630 mm and 0.1 mm vernier reading, accuracy class 1.

Caliper ШЦ- II-250-630-0.1-1 GOST 166

The same, type I caliper with a measuring range of 0-150 mm with a division value of the circular scale of 0.02 mm.

Caliper ShTsK-1-150 -0.02 GOST 166

The same, type I caliper with a measuring range of 0-125 mm with a discrete step of a digital reading device of 0.01 mm:

Caliper ШЦЦ-1-125-0.01 GOST 166

1.4. Calipers types II and III , completed with a device for marking, should be equipped with a device for fine installation of the frame (Fig. 3).

To fine-tune the frame, it is allowed to use a micrometric feed.

1.5. Departure of sponges l And l 2 And l 3 for measuring outer dimensions and jaw projectionl 1 for measuring internal dimensions must correspond to those indicated in table. 2 (devils 1-4).

table 2

measurement range	l	l 1	l 2	l 3


0 -135
0-150
0-160
0-200
0-250
0-300
0-400
0-500
250-630



5 00-1600

(Changed edition. Rev. No. 1, 2).

For calipers with a measurement limit of up to 400 mm, the size (Fig. 3-4) should not exceed 10 mm, and for calipers with an upper measurement limit of more than 400 mm - 20 mm.

1.7. The length of the vernier should be chosen from row 9; 19; 39 mm - with a vernier reading value of 0.1 mm, 19; 39 mm - with a vernier reading value of 0.05 mm.

Long vernier strokes are allowed to be marked with whole numbers.

1.8. Calipers with a digital reading device must ensure the performance of functions that characterize the degree of automation in accordance with the list (according to the application).

1.9. Digital calipers must be powered from the built-in power supply.

The power supply of calipers with the output of measurement results to an external device must be supplied from the built-in power source and (or) from a general-purpose network through a power supply unit.

(Revised edition, Rev. No. 2).

1.10. The design of calipers with a digital reading device must ensure the correctness of the readings at the highest allowable speed of the frame movement of at least 0.5 m / s.

1.11.(Excluded. Rev. No. 2).

2. TECHNICAL REQUIREMENTS

2.1. Calipers should be manufactured in accordance with the requirements of this standard according to working drawings approved in the prescribed manner.

2.3. The limit of permissible error of calipers at ambient temperature (20 ± 5) ° C must correspond to that specified in Table. 3.

2.4. The limit of permissible error for calipers of types 1 and T-1 when measuring a depth of 20 mm must comply with Table. 3.

Table 3

	Limit of error of calipers (±)
Measured length	with vernier reading value		with the division value of the circular scale of the reading device		with digital readout step
		0.1 for accuracy class		0.1 for accuracy class


St. 100 to 200






» 1100 » G200

Notes:

1. For the measured length, take the nominal distance between the measuring surfaces of the jaws.

2. For vernier calipers with one vernier, the error is checked using jaws for measuring outer dimensions.

3. When shifting the jaws of the calipers to their contact, the shift of the zero stroke of the vernier is allowed only in the direction of increasing the size.

4. The error of the caliper should not exceed the values specified in Table. 3 at a temperature of (20 ± 10) ° C when checking them against plane-parallel gauge blocks made of steel.

2.5. The tolerance of flatness and straightness of the measuring surfaces should be 0.01 mm per 100 mm of the length of the longer side of the measuring surface of the calipers.

In this case, the permissible deviations of the flatness and straightness of the measuring surfaces must be:

0.007 mm - for vernier calipers with a vernier reading value and with a scale division value of 0.1 mm and a length of the larger side of the measuring surface less than 70 mm.

The straightness tolerance of the end of the rod of calipers types I and T-1 shall be 0.01 mm.

Blockages are allowed along the edges of flat measuring surfaces in a zone with a width of not more than 0.2 mm.

Note. Flatness requirements apply only to surfaces with a width of more than 4 mm.

(Changed edition. Rev. No. 1, 2)

2.6. The tolerance of parallelism of the measuring surfaces of the jaws for measuring internal dimensions must be 0.010 mm over the entire length. For calipers of the 2nd accuracy class, the measuring surfaces of the edge jaws can be manufactured with a parallelism tolerance of 0.02 mm.

Blockages are allowed in the zone up to 0.5 mm from the upper edge of the measuring surfaces.

The parallelism tolerance per 100 mm length of the flat measuring surfaces of the jaws for measuring outer dimensions must be:

0.02 mm - with a vernier reading value, a scale division value and a discrete step of not more than 0.05 mm;

0.03 mm - with a vernier reading value and a scale division value of 0.1 mm.

2.7. The backlash of the micrometric pair of the device for fine setting of the frame should not exceed 1 / 3 of a turn.

2.8. Dimensional deviations of jaws with cylindrical measuring surfaces for measuring internal dimensions must not exceed: ( ) mm with a division value or a vernier reading value of at least 0.05 mm; ( ) mm at a division value or a discrete step of less than 0.05 mm.

2.9. The frame should not move along the rod under the action of its own weight with the vertical position of the caliper.

2.10. The force of moving the frame along the rod should be no more than the values \u200b\u200bspecified in Table. 4.

Table 4

Upper limit of caliper measurement, mm, no more	Movement force, N, no more

Note. For calipers with a measurement range of 0-125, 0-135, 0-150 mm, the allowable values of the displacement force are selected from the range of 10.15 N.

2.11. Requirements for the scale of the rod and vernier.

2.11.1 The location of the vernier scale plane relative to the rod scale plane is indicated in Fig. 7.

Damn 7

2.11.2. Distance but from the upper edge of the edge of the vernier to the surface of the rod scale should not exceed 0.25 mm for calipers with a reading value of 0.05 and 0.30 mm for calipers with a reading value of 0.1 mm.

2.11.3. The stroke sizes of the rod and vernier scales must correspond to the following:

stroke width 0.08-0.20 mm;

the difference in the width of the strokes within the same scale (for the scale of the rod at a distance of more than 0.3 from the edge of the scale) and the strokes of the scales of the rod and the vernier of one vernier caliper is not more than 0.03 mm when reading on a vernier of 0.05 mm; 0.05 mm with a vernier reading of 0.1 mm.

(Revised edition, Rev. No. 2).

2.12. Requirements for the dial of the reading device

2.12.1. The length of the scale division must be at least 1 mm.

2.12.2. The width of the scale strokes is 0.15-0.25 mm. The difference in the width of the corresponding strokes within the same scale should be no more than 0.05 mm.

2.12.4. The reading device must provide the ability to align the arrow with the zero division of the circular scale.

2.13. For calipers with a digital reading device, the height of the digits of the reading device must be at least 4 mm .

2.14. Calipers with a digital reading device can additionally be equipped with an interface for outputting the measurement result to an external device.

2.15. The hardness of the measuring surfaces of calipers must be: made of tool and structural steel - at least 59 HRC e;

from high-alloy steel - not less than 51.5 N R Se.

Note. For type I calipers with an upper measurement limit of up to 160 mm, made of tool or structural steel, the hardness of the measuring surfaces must be at least 53 HR Ce.

2.16. Roughness parameter of flat and cylindrical measuring surfaces of calipers -Rbut£ 0.32 microns according to GOST 2789-73;

measuring surfaces of edge sponges and flat auxiliary measuring surfaces -Rbut£ 0.63 microns according to GOST 2789-73.

2.17. The outer surfaces of the calipers must be coated or treated in accordance with the table. five.

Table 5

Surface name	Upper limit of measurement, mm	Type of treatment or coating of steel calipers
		highly alloyed	instrumental and structural
Rod (except for scale and end face), jaws, caliper frame, microfeed frame, except for measuring and adjacent surfaces			Chrome plating
Barbell and vernier scale		Matte coating	Chrome plating matte
			Chrome plating
	St. 630 to 2000		Chrome plating

Note. It is allowed to use other metal and non-metal coatings in accordance with GOST 9.303 and GOST 9.032, in terms of protective and decorative properties that are not inferior to those indicated in Table. five.

Calipers with an upper measurement limit of more than 1000 mm are allowed not to be chrome-plated.

(Revised edition, Rev. No. 1).

2.18. Calipers must be demagnetized.

1.19-2.24 (Excluded. Amendments No. 1, 2).

2.25. Completeness

2.25.1. Each caliper must be accompanied by operational documentation in accordance with GOST 2.601.

2.25.2. At the request of the consumer, calipers of types II and III are equipped with a marking device.

2.26. Marking

2.26.1. Each caliper must bear:

trademark of the manufacturer;

serial number according to the numbering system of the manufacturer;

conditional designation of the year of issue;

vernier reading value or division value;

size (for calipers types II and III with one vernier or one scale, hell. 3-4) on one of the sponges;

accuracy class 2 (for vernier calipers with a vernier reading value or a scale division value of 0.1 mm);

the word "Int." on a scale for measuring internal dimensions.

(Revised edition, Rev. No. 2).

2.26.2. It is allowed not to indicate the serial number in the operational documentation.

2.26.3. The marking on the case is according to GOST 13762.

The name or symbol of the caliper is applied only on the hard case.

2.27. Package

2.27.1. Methods and means for degreasing and conservation of calipers - according to GOST 9.014.

2.27.2. Calipers must be packed in cases made of materials in accordance with GOST 13762. Soft packaging is allowed for vernier calipers with an upper limit of up to 630 mm inclusive.

2.27.3. Calipers with a measurement limit of more than 400 mm when transported in containers may be packed in cases without shipping containers.

When packing without a transport container, the cases with calipers must be fixed so that they cannot be moved.

3. ACCEPTANCE

3.1. To verify the compliance of calipers with the requirements of this standard, state tests, acceptance control, periodic tests should be carried out.

(Revised edition, Rev. No. 2).

3.2. State tests - according to GOST 8.383 and GOST 8.001.

Checking the errors of calipers at a temperature of (20 ± 10) ° C is carried out only during state tests.

3.3. During acceptance control, each caliper is checked for compliance with the requirements of paragraphs. 1.3; 1.4; 1.6; 1.8; 2.3-2.10; 2.12.4; 2.16; 2.18; 2.25; 2.26.

(Revised edition, Rev. No. 2).

The test results are considered satisfactory if all samples meet all the requirements being tested.

3.5 (Deleted. Rev. No. 2).

4. CONTROL AND TEST METHODS

4.1. Verification of calipers according to GOST 8.113 and MI 1384.

4.2. When determining the effect of transport shaking, an impact stand is used that creates shaking with an acceleration of 30 m/s 2 at a frequency of 80-120 beats per minute.

The calipers in the package are attached to the stand and tested with a total number of impacts of 15000. After testing, the error of the calipers should not exceed the values \u200b\u200bspecified in Table. 3.

It is allowed to test calipers by transporting them on a truck at a speed of 20-40 km/h for a distance of at least 100 km along a dirt road.

4.3. The impact of environmental climatic factors during transportation is determined in climatic chambers in the following modes: at a temperature of minus (50 ±3)°С, plus (50 ±3)°С and at a humidity of (95 ±3)%. Exposure in the climatic chamber for each of the three types of tests - 2 hours. After testing, the error of calipers should not exceed the values \u200b\u200bspecified in Table 3.

It is allowed after holding the calipers in each mode to withstand it under normal conditions for 2 hours.

5. TRANSPORT AND STORAGE

Transportation and storage - according to GOST 13762.

6. INSTRUCTIONS FOR USE

Calipers were allowed to operate at an ambient temperature of 10 to 40°C and a relative humidity of no more than 80% at a temperature of 25°C.

7. MANUFACTURER WARRANTY

The manufacturer guarantees the compliance of calipers with the requirements of this standard subject to the conditions of transportation, storage and operation.

APPENDIX

tactile

LIST OF FUNCTIONS CHARACTERIZING THE DEGREE OF AUTOMATION

1. Issuance of digital information in a direct code (with indication of the sign and absolute value).

2. Setting the origin in the absolute coordinate system.

3. Memorization of the measurement result*.

4. Clearing the memory with restoring the current measurement result*.

5. Output of measurement results to an external device*.

6. Zero pre-stop.

7. Number presetting (constant entry)*.

8. Comparison of measurement results with threshold limits*.

9. Arithmetic operations with measurement results and constants*.

* By order of the consumer.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Machine Tool and Tool Industry

PERFORMERS

M. B. Shabalina, cand. tech. sciences (topic leader); N. V. Semenova

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Product Quality Management and Standards dated October 30, 1999 No. 3253

3. REPLACE GOST 166-80

4. Term of verification - III quarter. 1994, frequency - 5 years

5. The standard fully complies with ST SEV 704-77-ST SEV 707-77, ST SEV 1309-78, ISO 3599-76

6. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

	Item number
GOST 2.601-68
GOST 8.001-80
GOST 8.113-85
GOST 8.383-80
GOST 9.014-78
GOST 9.032-74
GOST 9.303-84
GOST 27.410-87
GOST 3882-74
GOST 13762-86	2.26.3; 2.27.2; 5