Продажа подшипников. Производство подшипников. Европейская подшипниковая корпорация

Bearings designations system

The Russian system of bearing designations is based on the following features:

inner diameter of bearing
diameter and width series or height series
type of bearing
design variety

All these parameters are designated by figures. The largest number of figures in the main part of bearing designation may be seven. The last number of figures is two. The order of figures counting in bearing designation runs from the right to the left. Symbols arrangement of bearing designation must be in correspondence with the scheme:

Х	ХХ	Х	Х	ХХ
Width series	Design variety	Type of bearing	Diameter series	Quotient from inner diameter value division d into 5, if d=20...495 мм

Bearings with inner diameter more than 495 mm are designated by fraction, where the denominator is the dimension of inner diameter, figures of the numerator are dimension series, type and design features in adopted for all bearings order, keeping in mind that two figures of the designation are already used. The fourth figure from the right represents the bearing type.

Designation		Bearing types
0		Deep groove ball bearing
1		Self-aligning ball bearing
2		Roller bearing with short cylindrical rollers
3		Radial self-aligning roller bearing
4		Radial roller bearing with long cylindrical rollers or needle rollers
5		Spiral wound roller bearing
6		Angularcontact thrust ball bearing
7		Taper roller bearings
8		Thrust ball bearing, angularcontact thrust ball bearing
9		Cylindrical roller thrust bearing, spherical roller thrust bearin

Code letters and figures additional to the basic designation are used to distinguish bearings which differ from standard or have modified components.

A figure with a dash before the basic designation indicates tolerance class of a bearing. Radial clearance group and friction torque row are given before tolerance class. The symbols for designation of normal radial clearance group and normal toler ance class are usually omitted.

Supplementary signs		The value of supplementary signs
А		Increased load carrying capacity bearings
Х		Case hardened steel rings and rolling elements or rings
Ю		All bearing elements or part of them made of corrosionresistant steel
Р		High temperature steel bearing elements
		Cage:
Г		ferrous metals cage
Б		tinless bronze cage
Д		aluminum alloy cage
Л		brass cage
Е		plastic cage
К		Design modifications of bearing elements
Т		Elements tempering temperature special requirements
Ш		Bearings vibration level special requirements
У		Supplementary requirements to bearing elements surface roughness, radial clearance, axial play, cross face width, elements coating, etc
М		Rollers with modified profile

Note: the figures after supplementary sign in bearing designation indicate its modification.

Supplementary signs given in table 2 do not apply to the bearings the distinguished features of which constitute property of their basic design. The list of such bearings is given below:

deep groove ball bearings with pressed steel cages
doublerow selfaligning ball bearings with pressed steel cages
singlerow and multiplerow radial roller bearings with massive brass cages with rivets
doublerow selfaligning roller bearings with massive brass cages
radial roller bearings with spiral wound and needle rollers with steel cages
angularcontact ball bearings with pressed steel cages
taper roller bearings with pressed steel cages
thrust ball bearings with pressed steel cages
thrust roller bearings with massive brass cages

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