Timken Super Precision Bearings for Machine Tool Applications

ENGINEERING
A
TOLERANCES – continued
BALL BEARINGS
Outer, Inner Rings ABEC 5, 7, 9 – ISO P5, P4, P2
Values of tolerances for super precision ball bearings are shown below.
All Timken sizes in this catalog are manufactured to MM and MMV levels.
Bearing bore
Δ dmp
Bore diameter (1)
+0.000 mm, +0.0000 in.
Standard ABEC/ISO tolerances – inner ring
All tolerances in number of millimeters (mm) and inches (in.)
V Bs
Width
variation
K ia
Raceway
radial runout
S ia
Raceway
axial runout
S d
Face runout
with bore
Δ Bs
Width
inner rings
+0.000 mm,
+0.0000 in.
ABEC/ISO ABEC/ISO ABEC/ISO ABEC/ISO ABEC/ISO ABEC/ISO
Over Incl. 5/P5 7/P4 9/P2 5/P5 7/P4 9/P2 5/P5 7/P4 9/P2 5/P5 7/P4 9/P2 5/P5 7/P4 9/P2
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
2.500 10.000 -0.005 -0.004 -0.0025 0.005 0.0025 0.0015 0.004 0.0025 0.0015 0.007 0.003 0.0015 0.007 0.003 0.0015 -0.040
0.0984 0.3937 -0.0002 -0.0002 -0.0001 0.0002 0.0001 0.0001 0.0002 0.0001 0.0001 0.0003 0.0001 0.00005 0.0003 0.0001 0.00005 -0.0015
10.000 18.000 -0.005 -0.004 -0.0025 0.005 0.0025 0.0015 0.004 0.0025 0.0015 0.007 0.003 0.0015 0.007 0.003 0.0015 -0.080
0.3937 0.7087 -0.0002 -0.0002 -0.0001 0.0002 0.0001 0.0001 0.0002 0.0001 0.0001 0.0003 0.0001 0.00005 0.0003 0.0001 0.00005 -0.0030
18.000 30.000 -0.006 -0.005 -0.0025 0.005 0.0025 0.0015 0.004 0.003 0.0025 0.008 0.004 0.0025 0.008 0.004 0.0015 -0.120
0.7087 1.1811 -0.0002 -0.0002 -0.0001 0.0002 0.0001 0.0001 0.0002 0.0001 0.0001 0.0003 0.0002 0.0001 0.0003 0.0002 0.00005 -0.0050
30.000 50.000 -0.008 -0.006 -0.004 0.005 0.003 0.0015 0.005 0.004 0.0025 0.008 0.004 0.0025 0.008 0.004 0.0015 -0.120
1.1811 1.9685 -0.0003 -0.0002 -0.00015 0.0002 0.0001 0.0001 0.0002 0.00015 0.0001 0.0003 0.0002 0.0001 0.0003 0.0002 0.00005 -0.0050
50.000 80.000 -0.009 -0.007 -0.0025 0.006 0.004 0.0015 0.005 0.004 0.0025 0.008 0.005 0.0025 0.008 0.005 0.0015 -0.150
1.9685 3.1496 -0.0004 -0.0003 -0.0001 0.0002 0.00015 0.0001 0.0002 0.00015 0.0001 0.0003 0.0002 0.0001 0.0003 0.0002 0.00005 -0.0060
80.000 120.000 -0.010 -0.008 -0.005 0.007 0.004 0.0025 0.006 0.005 0.0025 0.009 0.005 0.0025 0.009 0.005 0.0025 -0.200
3.1496 4.7244 -0.0004 -0.0003 -0.0002 0.0003 0.00015 0.0001 0.0002 0.0002 0.0001 0.00035 0.0002 0.0001 0.00035 0.0002 0.0001 -0.0080
120.000 150.000 -0.013 -0.010 -0.007 0.008 0.005 0.0025 0.008 0.006 0.0025 0.010 0.007 0.0025 0.010 0.006 0.0025 -0.250
4.7244 5.9055 -0.0005 -0.0004 -0.0003 0.0003 0.0002 0.0001 0.0003 0.00025 0.0001 0.0004 0.0003 0.0001 0.0004 0.00025 0.0001 -0.0100
150.000 180.000 -0.013 -0.010 -0.008 0.008 0.005 0.004 0.008 0.006 0.005 0.010 0.007 0.005 0.010 0.006 0.004 -0.250
5.9055 7.0866 -0.0005 -0.0004 -0.0003 0.0003 0.0002 0.00015 0.0003 0.00025 0.0002 0.0004 0.0003 0.0002 0.0004 0.00025 0.00015 -0.0100
180.000 250.000 -0.015 -0.012 -0.008 0.010 0.006 0.005 0.010 0.008 0.005 0.013 0.008 0.005 0.011 0.007 0.005 -0.300
7.0866 9.8425 -0.0006 -0.0004 -0.0003 0.0004 0.00025 0.0002 0.0004 0.0003 0.0002 0.0005 0.0003 0.0002 0.00045 0.0003 0.0002 -0.0120
The tolerances in this table are in conformance with ANSI ABMA Standard 20 - 1996.
(1) d min (the smallest single diameter of a bore) and d max (the largest single diameter of a bore) may fall outside limits shown. dmin + dmax must be within bore diameter tabulated.
2
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
in.
5/P5, 7/P4,
9/P2
mm
in.
ABMA ⁄ ISO Symbols - Inner Ring
dmp Single plane mean bore diameter deviation from basic bore
diameter, e.g., bore tolerance for a basically tapered bore,
dmp refers only to the theoretical small bore end of the bore
K ia Radial runout of assembled bearing inner ring, e.g., radial
runout of raceway
V Bs Inner ring width variation, e.g., parallelism
S d Inner ring reference face runout with bore, e.g.,
squareness - bore to face
S ia Axial runout of assembled bearing inner ring, e.g., lateral
(axial) runout of raceway
Bs Inner ring width deviation from basic, e.g., width tolerance
78 TIMKEN MACHINE TOOL CATALOG