Ball and Roller Bearings Machinery's Handbook, 31st Edition
2449
Table 1e. Types of Rolling Element Bearings and Their Symbols SELF-ALIGNING ROLLER BEARINGS, DOUBLE ROW
Symbol
Description
Symbol
Description
Raceway of outer ring spherical Rollers guided by the cage Two integral ribs on inner ring
Three integral ribs on inner ring Raceway of outer ring spherical Raceway of outer ring spherical Rollers guided by separate center guide ring in outer ring
SD
SL
SELF-ALIGNING ROLLER BEARINGS SINGLE ROW
SE
Symbol
Description
Inner ring with ribs Raceway of outer ring spherical Radial contact Raceway of outer ring spherical Angular contact Raceway of inner ring spherical Angular contact
SW Raceway of inner ring spherical
SR
Raceway of outer ring spherical Rollers guided by separate axially floating guide ring on inner ring
SA
SC
SB
THRUST BALL BEARINGS
Symbol
Description
Symbol
Description
Single direction, grooved raceways, flat seats
TA TB a
Double direction, washers with grooved raceways, flat seats
TDA
Single direction, flat washers, flat seats
TBF a
THRUST ROLLER BEARINGS
Symbol
Description
Symbol
Description
Single direction, flat seats, flat races, outside band, cylindrical rollers Single direction, flat races, aligning seat with aligning washer, cylindrical rollers
Single direction, aligning flat seats, spherical rollers
TPC a
TS
Single direction, flat seats, cylindrical rollers
TR a
TP
a Inch dimensioned only. Spherical Roller Thrust: This type is similar in design to the radial spherical roller bear ing except that it has a much larger contact angle. The rollers are barrel shaped with one end smaller than the other. This type of bearing has a very high thrust load carrying capac- ity and can also carry radial loads. Tapered Roller Thrust: In this type the rollers are tapered and several different arrange ments of housing and shaft are used. Roller Thrust: In this type the rollers are straight and several different arrangements of housing and shaft are used. Types of Needle Bearings.— Needle bearings are characterized by their relatively small size rollers, usually not above 1 ⁄ 4 inch (6.35 mm) in diameter, and a relatively high ratio of length to diameter, usually ranging from about 3 to 1 and 10 to 1. Another feature that
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online