1 General Fundamentals

1.1 Rolling Bearing Types
1.2 Materials and heat Treatment
1.3 Boundary Dimensions
1.4 Tolerances and Methods of Checking
1.5 Bearing Clearance
1.6 Code Numbers of Rolling Bearings

1.1 Rolling bearing Types

Generally, rolling bearings consist of two rings with a set of rolling elements running in their tracks. Standard shapes of rolling elements include the ball, cylindrical roller, needle roller, tapered roller, symmetrical and unsymmetrical barrel roller.

As a rule, the rolling elements are guided in a cage that ensures uniform spacing and prevents
mutual contact. In needle roller bearings and lipless spherical roller bearings the cage must
additionally provide for the correct position of the rolling element axis. Bearing ring and rolling elements are produced predominantly from through hardenable chromium steel. Casehardening
steel is also used.

The many types of rolling bearings are classified according to their design features and uses.
The main load direction distinguished radial bearings from axial bearings, and the shape of the
rolling elements distinguishes ball bearings from roller bearings. Another important chacteristics
is the manner in which rolling bearings guide a shaft. Do they permit axial displacement, do they
guide the shaft in one or both axial directions or do they permit angular movement and therefore
misalignment ??

1.1.1 Radial ball bearings

Deep - groove ball bearings

Both rings posses deep grooves with a radius only slightly exceeding the ball radius. Due to this
curvature ratio the bearing can support high radial forces forces as well as axial forces.

 

Single-row deep-groove ball bearings.

Double-row deep-groove ball bearing