Ball and Roller Bearings Machinery's Handbook, 31st Edition
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Table 5. ABEC-7 Tolerance Limits for Metric Ball and Roller Bearings ANSI/ABMA 20-1987 INNER RING
Width
Inner Ring Bore Basic Diameter, d mm
Ref. Face Runout with Bore S d
Axial Runout S ia d
Radial Runout K ia
V dp , a max Diameter Series
V Bs f
Δ dmp b
Δ ds c
Δ Bs e
0, 1, 2, 3, 4 High Low High Low max
Nor- mal − 40 − 80
Mod- ified g max − 250 2.5 − 250 2.5
Over Incl. 7, 8, 9
max
max All
2.5 10 10 18 18 30 30 50 50 80 80 120
4 4 5 6 7 8
3 3 4 5 5 6 8 9
0 0 0 0 0 0 0 0
3 3 4 4 5 5 6 7
3 3 4 4 5 5 7 8
0 0 0 0 0 0 0 0
− 4 0 − 4 0 − 5 0 − 6 0 − 7 0 − 8 0 − 10 0 − 12 0
− 4 2.5 − 4 2.5
3 4 4 5
− 5 − 6 − 7 − 8
− 120 − 250 2.5 − 120 − 250 3 − 150 − 250 4 − 200 − 380 4 − 250 − 380 5 − 300 − 500 6
120 180 10 180 250 12
− 10 6 − 12 8
a Bore ( V
dp ) and outside diameter ( V Dp ) variation in a single radial plane.
b Single plane mean bore (∆
dmp ) and outside diameter (∆ Dmp ) deviation from basic. (For a basi-
cally tapered bore, ∆ dmp refers only to the theoretical small end of the bore.) c Single bore (∆
ds ) and outside diameter (∆ Ds ) deviations from basic. These deviations apply to
diameter series 0, 1, 2, 3, and 4 only. d Axial run out of assembled bearing with inner ring S
ia . Applies to groove-type ball bearings
only.
e Single bore (∆
Bs ) and outer ring (∆ Cs ) width deviation from basic.
f Inner ( V Bs ) and outer ( V Cs ) ring width variation. g Applies to the rings of single bearings made for paired or stack mounting. OUTER RING Basic Outer Ring Outside Dia., D mm V Dp , a, b max Diameter Series Δ Dmp b Δ Ds c Radial Runout K ea Surface Runout S D d
Width
Axial Runout S ea f
V Cs h
Δ Cs g
Over
Incl. 7, 8, 9 0, 1, 2, 3, 4 High Low High Low max
max
max
High Low max
2.5 2.5 2.5
6
18 30 50 80
4 5 6 7 8 9
3 4 5 5 6 7 8 8
0 0 0 0 0 0 0 0
3 4 5 5 6 7
4 4 4 4 5 5 5 7
5 5 5 5 6 7 8
− 4 0 − 5 0 − 6 0 − 7 0 − 8 0 − 9 0 − 10 0 − 11 0
− 4 − 5 − 6 − 7 − 8 − 9
18 30 50
Identical to Δ Bs of inner ring of same bearing
3 4 5 5 7
80 120 120 150
150 180 10 180 250 11
− 10 8 − 11 19
10
a Bore ( V dp ) and outside diameter ( V Dp ) variation in a single radial plane. b No values have been established for capped bearings. c Single plane mean bore (∆ cally tapered bore, ∆ dmp refers only to the theoretical small end of the bore.) d Single bore (∆ diameter series 0, 1, 2, 3, and 4 only. e Outside cylindrical surface runout outer ring reference face S D f Axial run out of assembled bearing with outer ring S
dmp ) and outside diameter (∆ Dmp ) deviation from basic. (For a basi-
ds ) and outside diameter (∆ Ds ) deviations from basic. These deviations apply to
ia . Applies to groove-type ball bearings
only.
g Single bore (∆
Bs ) and outer ring (∆ Cs ) width deviation from basic.
h Inner ( V Bs ) and outer ( V Cs ) ring width variation. All units are micrometers, unless otherwise indicated. For sizes beyond range of this table, see Standard. This table does not cover instrument bearings.
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