Page 473 - Rollingbearings
P. 473
Designation system
Designation system
Group 1 Group 2 Group 3 / Group 4
4 1 4 2 4 3 4 4 4 5 4.6
Preixes
Basic designation
Listed in table 4, page 30
BA . Thrust ball bearing, bore diameter d < 10 mm
The one-digit number after BA identiies the
bore diameter.
Sufixes
5
Group 1: Internal design
Group 2: External design (seals, snap ring groove, etc.)
Group 3: Cage design
F Machined steel cage, ball centred
M Machined brass cage, ball centred
Group 4.1: Materials, heat treatment
Group 4.3: Bearing sets, matched bearings
Group 4.2: Accuracy, clearance, preload, quiet running
P5 Dimensional and geometrical tolerances to class P5
P6 Dimensional and geometrical tolerances to class P6
Group 4.4: Stabilization
Group 4.5: Lubrication
Group 4.6: Other variants
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