Ball bearing table: numbers, sizes and markings

In our article we will show in detail online the tables and dimensions of ball bearings in millimeters according to GOST. These parts are intermediate links between rotating axes and shafts. They also take on radial or longitudinal loads and transfer them to other parts of the mechanism. With their help, rotation, rocking or regular movement with a low coefficient of friction is ensured.

Kinds

They are classified according to the type of force transmission and the design of the supporting elements (balls, rollers, needles and other complex geometric shapes). All units for this purpose are built on the rolling principle.

Ball ones are divided into:

• • radial;
• • self-centering;
• • supporting;
• • radial contact.

Roller:

• • radial and thrust with cylindrical rolling elements;
• • with conical rotating parts.

Long cylindrical rollers GOST 25255

In the sorting attribute: letter D

rollers not sorted by length are designated by the letter
B
; rollers not sorted by diameter and length are designated.

Three degrees of roller accuracy are established, designated in order of decreasing accuracy by numbers: I; II; III.

The measure of accuracy of long cylindrical rollers is influenced by the following values: – variation in diameter of rollers in a batch – maximum deviations in roller length – variability of diameter – variation in length – cutting – end runout – roughness parameter

Registry:

Let's look at the technical parameters in more detail.

Table of seating dimensions and series of single-row radial ball bearings

This type is the most common and is used in mechanisms that have rotating parts: in electric motors, in gearboxes, in belt and chain drives of various sizes, from wristwatches to the power plants of an ocean liner.

The specific markings, table of sizes and numbers of bearings by diameter are the same for all types. They differ in technological features, level of protection and the presence of mounting grooves in the unit.

With one protective washer

The parameters and weight of these parts coincide with the data given above. The only difference for ISO is the additional letter z. For example, 6321 Z. According to GOST, the number 60 is placed in front of the number.

With two protective washers

The data for this type of nodes is the same as in the first statement. They only differ in the addition of the symbol ZZ for ISO and for GOST - the additional 80.

With one-sided seal

The parameters of these nodes coincide with the register above, with the exception of the letters in the ISO marking and the numbers in GOST. Instead of Z, RS is written, and 10 is inserted before the four-digit number.

Double sided

The data for such parts is analogous to the material given in the previous heading. Only the number 2 is inserted before RS, and 180 is written before the number.

With groove on outer ring

The ISO marking says 6003 N, according to GOST 50103.

With groove and one protective washer

Here the designations are as follows: 6003 ZN or 150103.

With groove and two protective washers

ISO – 6003 ZZN, GOST – 450103.

With double seal groove

The groove is designated by the letter N, and the seal is designated by RS or 2RS.

Angular contact ball bearings

This type provides a reaction in two planes along the axis and perpendicular to it. When using a two-row model, the shaft is fixed in space.

Dimensions in the table of angular contact ball bearings, single-row, one-piece

Standard sizes and weights of double-row angular contact ball bearings in the table

Thrust ball

This series of parts is designated by two types.

Single

There are no English letters in the ISO marking, and numbers begin with 511. According to the state standard, four-digit numbers with a prefix of 81.

With backing ring

Double row thrust ball bearings

Cylindrical roller bearings

These parts compare favorably with ball parts due to the increased load on the axle. The contact area of ​​the roller is much wider than that of a spherical bearing. Some modifications allow longitudinal displacement along the axis.

We will show tables that can be used to determine the size by bearing number:

Without flanges on the outer ring

With single breasted inner ring

With one built-in and one free flange on the inner ring

Sealed bearings on one side

160000 – with one seal, d - nominal diameter of the inner ring hole;
D – nominal diameter of the outer cylindrical surface of the outer ring; B is the nominal width of the bearing. These single-row bearings are designated according to GOST 8882-75 (ST SEV 3793-82)

Additionally designated: ball bearings with metal rings (non-contact seal), closed on one side (additional designation Z) and bearings with metal-rubber seals (contact seal), closed on one side (additional designation RS).

Tapered roller bearings

They have the same advantages as cylindrical ones: high load, the ability to disassemble. In addition, they allow you to adjust the gap between the rolling surfaces after working. These include the following types.

Single row

With a large cone angle

Double row

Four-row

Short cylindrical rollers GOST 22696

In the sorting attribute: letter D

rollers not sorted by length are designated by the letter
B
; rollers not sorted by diameter and length are designated.

For short cylindrical rollers, 6 degrees of accuracy are established: I, II, IIA, III, IIIA, IV.

The measure of accuracy of short cylindrical rollers is influenced by the following values: – maximum deviations of the average roller diameter – different sizes of rollers by diameter in a batch – variability of diameter – different sizes by length – maximum deviations of roller length – cutting – taper shape – end runout

Spherical roller bearings

They combine the ability to withstand high loads and have a deviation in the axes of landing and rotation. They are also called self-centering.

Double-row with sides on the inner ring

With beadless inner ring

Spherical double-row with sides on the inner ring with a landing cone 1:12

Spherical double-row with sides on the inner ring with a cone 1:30

Spherical double-row with a beadless ring with a hole with a taper of 1:30

Flatbed with inner ring with seat cone 1:12

Thrust spherical single row

Needle rollers GOST 6870

In the form of the ends: letter A

rollers with a spherical end are designated.
The letter B
denotes rollers with a flat end.

There are three degrees of accuracy for needle rollers: 2, 3, 4

(in order of decreasing accuracy).

Plain bearings

This unit does not have rolling elements. Its characteristics are as follows: the inner and outer cages are made along the same radius. Therefore, the axis, relative to the mandrel, has several degrees of freedom. Most often they are used in articulated joints.

Plain bearings with a hole and grooves for lubrication in the inner ring with a single-break ring

With double-break outer ring

With holes and grooves in the inner ring

With grooves on inner and outer rings

Without holes and grooves with single break ring

With holes and grooves on outer and inner rings with single break ring

With double-break outer ring

Below we provide tables of closed sizes of rolling and sliding ball bearings.

Bearings are sealed on both sides

180000 – with two seals;
d - nominal diameter of the hole of the inner ring; D – nominal diameter of the outer cylindrical surface of the outer ring; B is the nominal width of the bearing. Designation according to GOST 8882-75 (ST SEV 3793-82)

Additionally designated: ball bearings with metal rings (non-contact seal) closed on both sides (additional designation 2Z) and bearings with metal-rubber seals (contact seal) (additional designation 2RS).

Compared to sealed bearings on one side, this type of bearing is more versatile and can be installed in places where there is a possibility of contamination on either side.

Needle Bearing Size Chart

Official publication Reproduction prohibited

★

Edition (September 2003) with Change No. 1, approved in October 1983 (IUS M 2-84).

© Standards Publishing House, 1975 © IPK Standards Publishing House, 2003

Extra light diameter series 1

Dimensions, mm

Plain bearings

Thrust-radial roller

Table fields

They display the names of the main parameters and their geometric dimensions.

ISO marking

It is standard for most countries of the world, which indicates the number and design features.

GOST

It is a Russian analogue and performs the same functions.

Node internal diameter

It is measured in millimeters (mm) and is designated by the English letter d.

Outside diameter

Denoted as D.

Width

Measured in mm and identified by a capital B.

Weight

The measure is in kilograms (kg).

Scheme

Explains the basic structure.

Grease for rolling bearings, how to choose before assembly

Depending on the operating conditions and the design of the assembly mechanism, various compositions can be used, from oils to grease compositions.

Basic lubrication requirements:

• physical and chemical stability;
• absence of mechanical and other foreign impurities;
• protection against corrosion and oxidation of surfaces;
• good plastic characteristics, the ability to absorb and neutralize the effects of centrifugal forces;
• maintaining the initial consistency and degree of viscosity throughout the entire period of operation.

All basic recommendations for each series are described in detail in GOST and technological instructions, which should be carefully studied before installation.

Product sizing

In everyday life or production, these parameters are measured with certain tools: calipers, micrometers, bore gauges.

External Diameter Measurement

Manufacturing parameters are maintained quite accurately. Therefore, you should not trust the readings of a caliper. If it shows a non-standard value, then the real data will be the closest indicators indicated in the register.

How to measure the inner diameter of a product

Construction stores sell a special device called a bore gauge. But it is better to take the closest number from the classic report card as the true value.

Materials for the manufacture of rolling bearings

For the production of the main components, chromium steel alloys with a high carbon content ShKh15SG, ShKh15, etc., and alloyed case-hardening steels are used. For operation at elevated temperatures and in aggressive conditions, corrosion-resistant and heat-resistant steel alloys are used.

Cages require carbon steel and are produced by stamping. If operation occurs at an increased speed of shaft rotation, the separation elements are made of bronze, brass, etc.