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Recommended Bearing Shaft and Housing Sizes and Tolerances || Dynaroll

TECHNICAL INFORMATION

MOUNTING AND FITTING

RECOMMENDED FITS

The following table shows recommended shaft and housing sizes and tolerances for different applications. It is assumed that bearings used are ABEC 5 tolerance (+0 -.0002 inch) for bore and O.D. If a different grade of bearing is used, this will affect recommended dimensions of mating components.

ROTATING RING
INNER RING
OUTER RING
APPLICATION
DESIRED FIT TYPE
DESIRED FIT
(inches)
USE SHAFT DIAMETER
USE HOUSING DIAMETER
Preloaded assemblies (see pgs 31-36)
Bonding (no adhesive grooves)
.0004L to .0008L
d - .0006
d - .0008
D + .0004
D + .0006
Low speed, or spring preload.
Loose
.0001L to .0005L
d - .0003
d - .0005
D + .0001
D + .0003
Medium speed
Transition
.0002L to .0002T
d - .0000
d - .0002
D - .0000
D - .0002
High speed
Light press*
.0000 to .0004T
d +.0002
d - .0000
D - .0002
D - .0004
High speed, high load
Tight press*
.0002T to .0006T
d - .0002
d - .0004
D - .0004
D - .0006

STATIONARY RING
INNER RING
OUTER RING
Most applications
(see pgs 31 & 36)
Line - line to loose
.0000 to .0004L
d - .0002
d - .0004
D - .0000
D +.0002

L = Loose fit
T = Tight fit
d = Bearing bore from table
D = Bearing O.D. from table
*Notes for press fits:
1. Interference factor may affect final radial play
2. Allow for relative thermal expansion
3. MC5 radial play bearing (.0005 to .0008 in) recommended for tight press
4. Tight press not recommended for bearing with ring thickness <.030 in.