Ball and Roller Bearings Table 6. ABEC-9 Tolerance Limits for Metric Ball and Roller Bearing ANSI/ABMA 20-1987 INNER RING Machinery's Handbook, 31st Edition
2458
Width
Ref. Face Runout
Axial Runout of Assembled Bearing with Inner Ring S ia d
Inner Ring Bore Basic Dia., d mm Over Incl. 2.5 10
with Bore S d max
Radial Runout K ia
V dp , a max
V Bs f
Δ dmp b
Δ ds c
Δ Bs e
max
High Low High Low max
max
High Low max
2.5 2.5 2.5 2.5
0 0 0 0 0 0 0 0 0 0
1.5 1.5 1.5 1.5 1.5 1.5 2.5 2.5
1.5 1.5 2.5 2.5 2.5 2.5 2.5 2.5
0 0 0 0 0 0 0 0 0 0
− 2.5 0 − 2.5 0 − 2.5 0 − 2.5 0
− 2.5 1.5 − 2.5 1.5 − 2.5 2.5 − 2.5 2.5
− 40 1.5 − 80 1.5 − 120 1.5 − 120 1.5 − 150 1.5 − 150 1.5 − 200 2.5 − 250 2.5 − 300 4 − 350 5
10 18 30 50 50
18 30 50 80 80
4 4 5 7 7 8
0 0 0 0 0 0
2.5 2.5 2.5 2.5
− 4 − 4 − 5 − 7 − 7 − 8
− 4 − 4 − 5 − 7 − 7 − 8
80 120 120 150 150 180 180 250
5 5
4 5
5 5
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 to the theoretical small end of the bore.) c Single bore diameter (∆
ds ) and outside diameter (∆ Ds ) deviation from basic.
d Applies to groove-type ball bearings only. e Single bore (∆
Bs ) and outer ring (∆ Cs ) width variation from basic.
f Inner ( V
Bs ) and outer ( V Cs ) ring width variation.
OUTER RING
Width
Outside Cylindrical Surface Runout with Outer Ring S D
Axial Runout of Assembled Bearing with Outer Ring S ea
Basic Outside Diameter, D mm
Radial Runout K ea
V Dp a
V Cs f
Δ Dmp b
Δ Ds c
Δ Cs e
Over Incl. max High Low High Low max
max
max
High Low max
1.5 1.5 1.5 1.5 1.5 1.5 2.5
6
18 2.5 0
1.5 1.5 1.5 1.5 2.5 2.5 2.5
1.5 2.5 2.5
− 2.5 0 − 4 0 − 4 0 − 4 0 − 5 0 − 5 0 − 7 0 − 8 0 − 8 0
− 2.5 1.5 − 4 2.5 − 4 2.5
18 30 30 50 50 80
4 4 4
0 0 0 0 0 0 0 0
Identical to Δ Bs of inner ring of same bearing
4 5 5 5 7 7
4 5 5 5 7 7
− 4 − 5 − 5 − 7 − 8 − 8
80 120 5 120 150 5 150 180 7 180 250 8 250 315 8
4 5
4 5
a No values have been established for capped bearings. All units are micrometers, unless otherwise indicated. For sizes beyond range of this table, see Standard. This table does not cover instrument bearings. Table 7. Tolerance Limits for Single Direction Ball Thrust Bearings— Inch Design ANSI/ABMA 24.2-1989 (R1999)
Single Plane Mean Bore Dia. Variation, d , Inch
Single Plane Mean O.D. Variation, D , Inch
Bore Diameter a d , Inches
Outside Diameter D , Inches
Over
Incl. 6.7500 20.0000
High +0.005 +0.010
Low
Over
Incl. 5.3125 17.3750 39.3701
High
Low
0
0 0
0
+0 +0 +0
− 0.002 − 0.003
6.7500
5.3125
… … 17.3750 − 0.004 a Bore tolerance limits: For bore diameters 0 to 1.8125 inches, inclusive, +0.005, −0.005; over 1.8125 to 12.000 inches, inclusive, +0.010,−0.010; over 12.000 to 20.000, inclusive, +0.0150, −0.0150. … …
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