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1.TYPES AND FEATURES OF ROLLING BEARINGS

1.1 Design and Classification (2) With the advancement of worldwide standardization,
rolling bearings are internationally available and
Rolling bearings generally consist of two rings, rolling interchangeable.
elements, and a cage, and they are classified into radial
bearings or thrust bearings depending on the direction (3) Maintenance, replacement, and inspection are easy
of the main load. In addition, depending on the type of because the structure surrounding rolling bearings
rolling elements, they are classified into ball bearings is simple.
or roller bearings, and they are further segregated by
differences in their design or specific purpose. (4) Many rolling bearings are capable of taking
The most common bearing types and nomenclature both radial and axial loads simultaneously or
of bearing parts are shown in Fig.1.1, and a general independently.
classification of rolling bearings is shown in Fig. 1.2.
(5) Rolling bearings can be used under a wide range of
1.2 Characteristics of Rolling Bearings temperatures.

Compared with plain bearings, rolling bearings have (6) Rolling bearings can be preloaded to produce a
the following major advantages: negative clearance and achieve greater rigidity.
(1) Their starting torque or friction is low and the
Furthermore, different types of rolling bearings have
difference between the starting torque and running their own individual advantages. The features of the
torque is small. most common rolling bearings are described on Pages
A10 to A12 and in Table 1.1 (Pages A14 and A15).

Width Contact Angle

Snap Ring Bore Dia. Outer Ring Outer Ring Outer Ring Inner Ring Outer Ring Rib
Cage Pitch Diameter Inner Ring Front Face Back Face Rib
Rivet L-Shaped
Ball Outside Dia. Inner Ring Inner Ring Roller Thrust Collar
Back Face Front Face Inscribed
Circle Dia.
Inner Ring Effective
Raceway Side Face Load Center Cylindrical
Shield Roller
Outer Ring Cross-Face Width
Raceway Chamfer Dimension Cylindrical Roller Bearing

Single-Row Deep Groove Ball Bearing Single-Row Angular Contact Ball Bearing

Bearing Width Adapter
Stand out RaAdliiugsning Seat

Tapered Roller Cone Front Face Rib Lock Aligning Seat Bore Dia.
Washer Center Height
Cone Back Shaft Washer
Face Rib Nut
Contact Tapered Bore Height Ball
Effective Load Angle Sleeve Housing Washer
Center
Housing

Cone Back Cone Front Face Inner Ring Washer Aligning
Face Bore Dia. Seat
Cup Back Face Spherical Roller Washer
Cup Front Outer Ring Outside Dia.
Face Aligning Seat
Washer O.D.

Tapered Roller Bearing Spherical Roller Bearing Single-Direction Thrust Ball Bearing

Fig. 1.1 Nomenclature for Bearing Parts

A6 A7