Official edition

GOSSTANDART OF RUSSIA

PINS

Official edition

Moscow-1993

UDC 621.886:006.354

Group G37

STATE STANDARD OF THE UNION OF THE SSR

CYLINDRICAL PINS

UNHARDENED GOST

Specifications 3128-70

(ST SEV 239-87)

Unhardened cylindrical pins. Specifications

Valid from 07/01/71 to 01/01/95

1. This* standard applies to cylindrical unhardened pins of accuracy classes A, B and C with a diameter of 0.6 to 50 mm.

2. The dimensions of the pins must correspond to those indicated in the drawing and in the table.

a - version 1 (accuracy class A); b - version 2 (accuracy class B); a - version 3 (accuracy class C)

Official edition ♦

Reprint prohibited

							Theoretical weight 1000 pcs.

* For pins d ~ (1.6) and (32) mm

Note. Sizes enclosed in brackets are not recommended.

An example of a symbol for a pin, version 1, with a diameter of yMO mm, a length of h60 mm, uncoated:

Pin 10*60 GOST 3128-70

The same, version 2, with oil impregnated chemical oxide coating:

Pin 2.10 * 60. Chem. Ok. prm. GOST 3128-70 The same, version 3:

Pin 3.10 * 60. Chem. Ok. prm. GOST 3128-70.

1.2. (Revised edition, Rev. No. 3).

3-17. (Deleted, Rev. No. 3).

18. "Ptifts must meet all the requirements of GOST 26862-86 and the requirements set forth in this standard. (Introduced additionally, Amendment No. 3).

1. Fits in pin connections with cylindrical pins

version 1:

with interference K7/sh6, N7/m6

transition H7/sh6

with clearance F7/m6

2. Fits in pin connections with cylindrical pins

execution 2:

transitional R8/h8, H9/h8.

An example of the use of landings R8/h8, H9/h8 in locking pin connections is shown in the drawing.

3. Landing in pin connections with cylindrical versions 3 - H12 / N1.

pins

INFORMATION DATA

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

DEVELOPERS:

V. G. Seregin, A. M. Sviridov, T. B. Levina, T. N. Kuptsova

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards No. 1789 of December 22, 1970

3. Term of check 1993; inspection frequency 5 years

4. The standard fully complies with ST SEV 239-87

5. The standard fully complies with ISO 2338-1986

6. REPLACE GOST 3128-60

Mechanical systems. GOST 3128-70: Non-hardened cylindrical pins. Specifications. OKS: General purpose mechanical systems and devices, Fasteners. GOSTs. Cylindrical pins not hardened. Technical.... class=text>

GOST 3128-70

Cylindrical pins not hardened. Specifications

GOST 3128-70
(CT SEV 239-87)
Group G37

STATE STANDARD OF THE UNION OF THE SSR

CYLINDRICAL PINS UNHARDENED

Specifications

Unhardened cylindrical pins. Specifications

OKP 16 8000

Valid from 07/01/71
until 01.01.95*
_______________________________
* Expiry date removed
according to protocol N 4-93 of the Interstate Council
on standardization, metrology and certification.
(IUS N 4, 1994) - Note "CODE.

INFORMATION DATA

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

V.G. Seregin, A.M. Sviridov, T.B. Levina, T.N. Kuptsova

2. APPROVED AND INTRODUCED BY Decree of the State Committee of the USSR on Standards dated December 22, 1970 N 1789

3. Term of check 1993;
inspection frequency 5 years

4. The standard fully complies with ST SEV 239-87

5. The standard fully complies with ISO 2338-1986

6. REPLACE GOST 3128-60

7. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

8. REPUBLICATION (September 1992) with changes N 1, 2, 3, approved in January 1979, December 1983, May 1988 (IUS N 3-79, 3-84, 8-88)

9. Checked in 1988. Validity period extended until 01.01.95 (Resolution of the State Standard of the USSR of 11.05.88 N 1291)

1. This standard applies to cylindrical unhardened pins of accuracy classes A, B and C with a diameter of 0.6 to 50 mm.

2. The dimensions of the pins must correspond to those indicated in the drawing and in the table.

a- version 1 (accuracy class A); b- version 2 (accuracy class B); in- version 3 (accuracy class C)

Dimensions, mm

Theoretical weight 1000 pcs. steel fonts in kg

416,2 473,5*

471,7 536,6*

527,2 599,7*

_______________
* For pins =(1.6) and (32) mm
Note. Sizes enclosed in brackets are not recommended.

An example of a symbol for a pin, version 1, diameter = 10 mm, length = 60 mm, uncoated:

PinGOST 3128-70

The same, version 2, with oil impregnated chemical oxide coating:

Pin. Chem. Oks. prm. GOST 3128-70

The same, execution 3:

Pin . Chem. Oks. prm. GOST 3128-70.

1, 2. (Changed edition, Rev. N 3).

3-17. (Excluded, Rev. N 3).

18. Pins must meet all the requirements of GOST 26862-86 and the requirements set forth in this standard.
(Introduced additionally, Rev. N 3).

1. Landings in pin connections with cylindrical pins of version 1:
with preload K7/m6, N7/m6
transition H7/m6
with clearance F7/m6

2. Landings in pin connections with cylindrical pins of version 2:
transitional R8/h8, H9/h8.
An example of the use of landings R8/h8, H9/h8 in locking pin connections is shown in the drawing.

3. Landing in pin connections with cylindrical pins of execution 3 - H12/h11.

The GOST 3128-70 pin is a cylindrical or conical rod (GOST 3129-70), which must be inserted into the holes of the parts to be connected for connection. Pins allow you to accurately fix the relative position of the parts. It is possible to use a non-hardened pin on parts subjected to light loads.

Pins are locating and fixing, as well as cylindrical and conical in shape. The working part of the pins can be smooth or perforated (grooves are cut or squeezed out). This avoids reaming the hole and creates a more secure connection that prevents the pin from falling out during operation.

The cylindrical pin holds the parts due to friction or tension. All pins are manufactured with high precision and high surface finish. Holes in the parts to be joined for such pins are drilled and reamed at the same time, for which it is necessary to temporarily fasten the parts.

Non-hardened cylindrical pin GOST 3128-70 can also be used as an adjusting pin. For a more accurate positioning of the parts to be joined, it is necessary to increase the distance between the pins as much as possible.

Usually pins are made of carbon steel or stainless steel.

Symbol example:

Pin 10 x 60 GOST 3128-70

Non-hardened cylindrical pin, version 1, d = 10 mm, L = 60 mm.

Types of pins according to GOST 3128-70

Dimensions for non-hardened pins

* Only for roll pins.
** Only for conical pins (GOST 3129-70).

This standard provides for d = 0.6 ... 50 mm and non-recommended dimensions.

GOSSTANDART OF RUSSIA
Moscow

STATE STANDARD OF THE UNION OF THE SSR

Valid from 07/01/71

1. This standard applies to cylindrical unhardened pins of accuracy classes A, B and C with a diameter of 0.6 to 50 mm.

2. The dimensions of the pins must correspond to those indicated in the drawing and in the table.

a- version 1 (accuracy class A); b- version 2 (accuracy class B); in- version 3 (accuracy class C)

Dimensions, in mm

Theoretical weight 1000 pcs. steel pins in kg *

* For pins d=(1.6) and (32) mm

Note. Sizes enclosed in brackets are not recommended.

An example of a symbol for a pin, version 1, with a diameter d= 10 mm long l= 60 mm, uncoated:

The same, version 2, with oil impregnated chemical oxide coating:

Pin 2.10´ 60. Chem. Oks. prm. GOST 3128-70

The same, execution 3:

Pin 3.10´ 60. Chem. Oks. prm. GOST 3128-70.

1, 2. (Changed edition, Rev. No. 3).

3 - 17. (Deleted, Rev. No. 3).

18. Pins must meet all the requirements of GOST 26862-86 and the requirements set forth in this standard.

(Introduced additionally, Rev. No. 3).

1. Landings in pin connections with cylindrical pins of version 1:

with interference K7/m6, N7/m6

transition H7/m6

with clearance F7/m6

2. Landings in pin connections with cylindrical pins of version 2:

transitional R8/h8, H9/h8.

An example of the use of landings R8/h8, H9/h8 in locking pin connections is shown in the drawing.

3. Landing in pin connections with cylindrical pins of execution 3 - H12/h11.

INFORMATION DATA

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

DEVELOPERS:

V.G. Seregin, A.M. Sviridov, T.B. Levina, T.N. Kuptsova

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards No. 1789 of December 22, 1970

3. Term of check 1993; inspection frequency 5 years

4. The standard fully complies with ST SEV 239-87

5. The standard fully complies with ISO 2338-1986

6. REPLACE GOST 3128-60

7. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

8. REPUBLICATION (September 1992) with changes No. 1, 2, 3, approved in January 1979, December 1983, May 1988 (IUS No. 3-79, 3-84, 8-88)