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Bearings designation according to the Russian Standard (GOST)

Bearings designation according to the Russian Standard (GOST)

In general the designation of rolling bearings includes the basic designation that contains not less than two and no more than seven figures and extra symbols, located to the left and to the right of the basic designation. The extra symbol situated at the left of the basic designation is always separated from the basic with the dash (-), and extra symbol situated at the right of the basic always begins with a letter. You can find the basic symbols of the Russian Standard (GOST) in the table.
Our company produces bearings with the technical features required by the customer. These technical features are signed with extra symbols at the left and at the right of the basic designation symbols, described in this section.
Bearings with the bore diameter up to 10 mm.
Extra symbols at the left Basic designation symbols Extra symbols at the right

1

2

3

4

1

2

3

4

5

6

7

1

2

3

4

5

6

Extra symbols at the left
1 A, ,  — designation of categories
2 1, 2, 3, 4, 5, 6, 7, 8, 9 — designation of friction torque rows
3 Designation of radial plays groups:
0, 1, 2, normal, 3, 4, 5, 6, 7, 8, 9 — according to GOST 24810
6, normal, 7, 8 — according to .006-00
1, 0, 2, 3, 4 — according to 37.006.309
4 Accuracy ratings according to the Russian Standard (GOST) 520: 8, 7, normal(0), 6, 5, 4, , 2
Basic symbols for the designation of bearings with the bore diameter up to 10 mm
1 Width series
2 Design features
3 Design features
4 Type of bearing
5 Symbol 0
6 Diameters series
7 Inner bore diameter
Basic symbols for the designation of bearings with the bore diameter over 10 mm
1 Width series
2 Design features
3 Design features
4 Type of bearing
5 Diameters series
6 Bore diameter
7 Bore diameter
Extra symbols at the right
1 Material for the parts bearing:
, 1, 2… — all parts bearing or some of parts bearing made of stainless steel
, 1, 2… — rings and elements rolling or rings separately (including one ring) made of cement stee
, 1, 2… — parts bearing, made of heat-resisting types of steel
, 1, 2… — parts bearing, made of seldom used materials (glass, ceramics, and etc.)
, 1, 2… — retainer made of ferrous metals
, 1, 2… — retainer made of tinless bronze
, 1, 2… — retainer made of aluminium alloy
, 1, 2… — retainer made of brass
, 1, 2… — retainer made of plastic materials
2 , 1, 2… — design modification symbols
3 , 1, 2… — these symbols describe special technical requirements (roughness requirements, surface requirements etc.)
4 , 1, 2… — symbols of tempering temperature of bearing rings
5 1, 2, 3… — symbols for lubricants for shielded bearings
6 , 1, 2… — these symbols describe noise level (vibration level) requirements. If figures index increases the vibration level decreases

Dimensions of fitting chamfers

The catalogue consists of the least dimensions for fitting chamfers, the surfaces of which can be directly mate with shaft and case fillets.
In accordance with our customers demand the bearings with non-standard dimensions of fitting chamfers can be produced.

Plays (clearances)

Play is an arithmetic mean of displacement of one ring regarding to another one in radial direction (radial plays) or axial direction (axial plays). The company produces bearings with standard and non-standard plays. Dimensions of these bearings are determined on the design stage and the operational development.
At the same time, practically all bearings of our factory pass the plays control with load, that's why in accordance with the local standard the dimensions of radial plays are slightly increased in comparison with the dimensions, prescribed by the Russian standard (GOST). There are some extra groups of play dimensions for the ball bearings.

Accuracy ratings

MBF produces bearings with the following accuracy ratings - normal (0), 6, 5, 4, , 2 according to the Russian Standard GOST 520. The Russian Standard GOST 520 is the basic document of technical requirements that prescribes the accuracy parameters and the general technical requirements for the bearings that are compulsory and can be the subject of bearings incoming inspection.
If it necessary to produce bearings with more (less) strict requirements concerning to the Russian Standard (GOST) 520, delivery of bearings is realized according to the technical conditions, which are considered as appendices to the basic standard.
According to the technical requirements of accuracy ratings 8 and 7, tolerances are a little bit extended in comparison with a normal accuracy rating (0). Accuracy of rolling bearings is characterized by accuracy of mounting dimensions and rotation accuracy.

Lubrications

In this catalogue we do not list all embodiments of the basic bearings according to the lubrications because of plenty of lubricants. The company can deliver bearings with any type of greasing.

Quality system

The quality management system is introduced at MBF. During the process of the quality management system development the customers' requirements have been considered. The main aim of this system is the constant guaranteeing improvement of consumers' requirements and the efficiency increase of the enterprise activity.
The basic processes leading to the activity improvement, the sequence and the interaction of these processes are determined at MBF. The system of internal audits and the leadership analysis are also introduced at MBF.
In order to improve the processes performance at the enterprise, the personnel teaching and the development of necessary documentation is realized. The state body according to the international standard requirements ISO 9001-2001 and the Russian standard GOST 15.002-2003 certificates the quality management system.

Packing

There are three ways of individual packing of bearings:
1. In vials.
2. In blister packs by thermal vacuumization
3. In a paraffin paper.
External packing:
Cardboard boxes 170×170 × 320 mm, 170×170 × 170 mm, 230×200 × 160 mm.

 

 

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