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PRECISION TOLERANCES & RECOMMENDED FITS

• TYPE C - Precision Class 1 (Ref. ABEC 1F)
• TYPE A & X - Precision Class 1 (Ref. ABEC 1F)
• TYPE A,C & X - Precision Class 3 (Ref. ABEC 3F)
• TYPE A,C & X - Precision Class 5 (Ref. ABEC 5F)
TYPE C - PRECISION CLASS 1 (Ref. ABEC 1F)
Bearing
Size
(All sizes)		 Bearing
Diameters		 Radial & Axial
Runout		 Rotating Shaft
or Duplex DF Mounting		 Stationery Shaft
or Duplex DF Mounting		 Bearing
Diametral
Clearance*
Bearing
Bore
Nominal
+.0000		 Bearing
OD
Nominal
+.0000		 Inner
Race		 Outer
Race		 Shaft
Diameter		 Housing
Bore		 Shaft
Diameter		 Housing
Bore
Nominal
+.0000		 Nominal
+.0000		 Nominal Nominal Before
Installation
10 –.0004 –.0005 .0005 .0008 +.0004 +.0005 –.0004 –.0008 –.0005 –.0010 .0010 .0016
15 –.0005 –.0005 .0006 .0008 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0012 .0018
17 –.0006 –.0005 .0008 .0010 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0024
020 –.0006 –.0005 .0008 .0010 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0024
025 –.0006 –.0005 .0008 .0010 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0024
030 –.0006 –.0006 .0008 .0010 +.0006 +.0006 –.0006 –.0012 –.0006 –.0012 .0012 .0024
035 –.0008 –.0006 .0010 .0012 +.0008 +.0006 –.0008 –.0016 –.0006 –.0012 .0016 .0028
040 –.0008 –.0006 .0010 .0012 +.0008 +.0006 –.0008 –.0016 –.0006 –.0012 .0016 .0028
042 –.0008 –.0008 .0010 .0014 +.0008 +.0008 –.0008 –.0016 –.0008 –.0016 .0016 .0028
045 –.0008 –.0008 .0010 .0014 +.0008 +.0008 –.0008 –.0016 –.0008 –.0016 .0016 .0028
047 –.0010 –.0008 .0008 .0014 +.0010 +.0008 –.0010 –.0020 –.0008 –.0016 .0020 .0034
050 –.0010 –.0008 .0012 .0014 +.0010 +.0008 –.0010 –.0020 –.0008 –.0016 .0020 .0034
055 –.0010 –.0010 .0012 .0016 +.0010 +.0010 –.0010 –.0020 –.0010 –.0020 .0020 .0034
060 –.0010 –.0010 .0012 .0016 +.0010 +.0010 –.0010 –.0020 –.0010 –.0020 .0020 .0034
065 –.0010 –.0010 .0012 .0016 +.0010 +.0010 –.0010 –.0020 –.0010 –.0020 .0020 .0034
070 –.0010 –.0012 .0012 .0016 +.0010 +.0012 –.0010 –.0020 –.0012 –.0024 .0020 .0034
075 –.0012 –.0012 .0016 .0018 +.0012 +.0012 –.0012 –.0024 –.0012 –.0024 .0024 .0042
080 –.0012 –.0012 .0016 .0018 +.0012 +.0012 –.0012 –.0024 –.0012 –.0024 .0024 .0042
090 –.0012 –.0012 .0016 .0018 +.0012 +.0012 –.0012 –.0024 –.0012 –.0024 .0024 .0042
100 –.0014 –.0014 .0018 .0020 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0048
110 –.0014 –.0014 .0018 .0020 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0048
120 –.0014 –.0014 .0018 .0020 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0048
140 –.0016 –.0016 .0018 .0020 +.0016 +.0016–.0016 –.0032 –.0016 –.0032 .0032 .0052
160 –.0018 –.0018 .0018 .0020 +.0018 +.0018 –.0018 –.0036 –.0018 –.0036 .0036 .0056
180 –.0018 –.0018 .0020 .0020 +.0018 +.0018–.0018 –.0036 –.0018 –.0036 .0036 .0056
200 –.0020 –.0020 .0020 .0020 +.0020 +.0020 –.0020 –.0040 –.0020 –.0040 .0040 .0060
250 –.0030 –.0030 .0020 .0020 +.0030 +.0030–.0030 –.0060 –.0030 –.0060 .0060 .0080
300 –.0030 –.0030 .0020 .0020 +.0030 +.0030 –.0030 –.0060 –.0030 –.0060 .0060 .0080
350 –.0040 –.0040 .0020 .0020 +.0040 +.0040–.0040 –.0080 –.0040 –.0080 .0080 .0100

*Dimetral clearance after installation could vary significantly if bearing, housing, and shaft tolerances are at either end of their range. Shaft and housing diameters are for steel under normal conditions.

TYPE A & X - PRECISION CLASS 1 (Ref. ABEC 1F)
Bearing
Size
(All sizes)		 Bearing
Diameters		 Radial & Axial
Runout		 Rotating Shaft
or Duplex DF Mounting		 Stationery Shaft
or Duplex DF Mounting		 Bearing
Diametral
Clearance*
Type X only
Bearing
Bore
Nominal
+.0000		 Bearing
OD
Nominal
+.0000		 Inner
Race		 Outer
Race		 Shaft
Diameter		 Housing
Bore		 Shaft
Diameter		 Housing
Bore
Nominal
+.0000		 Nominal
+.0000		 Nominal Nominal Before
Installation
10 –.0004 –.0005 .0003 .0004 +.0004 +.0005 –.0004 –.0008 –.0005 –.0010 .0010 .0015
15 –.0005 –.0005 .0004 .0004 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0012 .0017
17 –.0006 –.0005 .0005 .0005 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0022
020 –.0006 –.0005 .0005 .0005 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0022
025 –.0006 –.0005 .0005 .0005 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0022
030 –.0006 –.0006 .0006 .0006 +.0006 +.0006 –.0006 –.0012 –.0006 –.0012 .0012 .0022
035 –.0008 –.0006 .0006 .0006 +.0008 +.0006 –.0008 –.0016 –.0006 –.0012 .0016 .0026
040 –.0008 –.0006 .0006 .0006 +.0008 +.0006 –.0008 –.0016 –.0006 –.0012 .0016 .0026
042 –.0008 –.0008 .0008 .0008 +.0008 +.0008 –.0008 –.0016 –.0008 –.0016 .0016 .0026
045 –.0008 –.0008 .0008 .0008 +.0008 +.0008 –.0008 –.0016 –.0008 –.0016 .0016 .0026
047 –.0010 –.0008 .0008 .0008 +.0010 +.0008 –.0010 –.0020 –.0008 –.0016 .0020 .0030
050 –.0010 –.0008 .0008 .0008 +.0010 +.0008 –.0010 –.0020 –.0008 –.0016 .0020 .0030
055 –.0010 –.0010 .0010 .0010 +.0010 +.0010 –.0010 –.0020 –.0010 –.0020 .0020 .0030
060 –.0010 –.0010 .0010 .0010 +.0010 +.0010 –.0010 –.0020 –.0010 –.0020 .0020 .0030
065 –.0010 –.0010 .0010 .0010 +.0010 +.0010 –.0010 –.0020 –.0010 –.0020 .0020 .0030
070 –.0010 –.0012 .0010 .0010 +.0010 +.0012 –.0010 –.0020 –.0012 –.0024 .0020 .0030
075 –.0012 –.0012 .0012 .0012 +.0012 +.0012 –.0012 –.0024 –.0012 –.0024 .0024 .0034
080 –.0012 –.0012 .0012 .0012 +.0012 +.0012 –.0012 –.0024 –.0012 –.0024 .0024 .0034
090 –.0012 –.0012 .0012 .0012 +.0012 +.0012 –.0012 –.0024 –.0012 –.0024 .0024 .0034
100 –.0014 –.0014 .0014 .0014 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0038
110 –.0014 –.0014 .0014 .0014 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0038
120 –.0014 –.0014 .0014 .0014 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0038
140 –.0014 –.0014 .0014 .0014 +.0014 +.0014 –.0014 –.0028 –.0014 –.0028 .0028 .0038
160 –.0016 –.0016 .0016 .0016 +.0016 +.0016 –.0016 –.0032 –.0016 –.0032 .0032 .0042
180 –.0016 –.0016 .0016 .0016 +.0016 +.0016 –.0016 –.0032 –.0016 –.0032 .0032 .0042
200 –.0018 –.0018 .0018 .0018 +.0018 +.0018 –.0018 –.0036 –.0018 –.0036 .0036 .0046
220 –.0018 –.0018 .0018 .0018 +.0018 +.0018 –.0018 –.0036 –.0018 –.0036 .0036 .0046
250 –.0018 –.0018 .0018 .0018 +.0018 +.0018 –.0018 –.0036 –.0018 –.0036 .0036 .0046
300 –.0018 –.0018 .0018 .0018 +.0018 +.0018 –.0018 –.0036 –.0018 –.0036 .0036 .0046
350 –.0020 –.0020 .0020 .0020 +.0020 +.0020 –.0020 –.0040 –.0020 –.0040 .0040 .0050

*Dimetral clearance after installation could vary significantly if bearing, housing, and shaft tolerances are at either end of their range. Shaft and housing diameters are for steel under normal conditions.

TYPE A,C & X - PRECISION CLASS 3 (Ref. ABEC 3F)
Bearing
Size
(All sizes)		 Bearing
Diameters		 Radial & Axial
Runout		 Rotating Shaft
or Duplex DF Mounting		 Stationery Shaft
or Duplex DF Mounting		 Standard
Bearing
Diametral
Clearance*
Type X & C Only
Bearing
Bore
Nominal
+.0000		 Bearing
OD
Nominal
+.0000		 Inner
Race		 Outer
Race		 Shaft
Diameter		 Housing
Bore		 Shaft
Diameter		 Housing
Bore
Nominal
+.0000		 Nominal
+.0000		 Nominal Nominal Before
Installation
10 –.0002 –.0003 .0003 .0004 +.0002 +.0003 –.0002 –.0004 –.0003 –.0004 .0007 .0011
15 –.0003 –.0003 .0004 .0004 +.0003 +.0003 –.0003 –.0006 –.0003 –.0006 .0008 .0012
17 –.0004 –.0004 .0004 .0005 +.0004 +.0004 –.0004 –.0008 –.0004 –.0008 .0008 .0018
020 –.0004 –.0004 .0004 .0005 +.0004 +.0004 –.0004 –.0008 –.0004 –.0008 .0008 .0018
025 –.0004 –.0004 .0004 .0005 +.0004 +.0004 –.0004 –.0008 –.0004 –.0008 .0008 .0018
030 –.0004 –.0004 .0004 .0006 +.0004 +.0004 –.0004 –.0008 –.0004 –.0008 .0008 .0018
035 –.0005 –.0004 .0005 .0006 +.0005 +.0004 –.0005 –.0010 –.0004 –.0008 .0010 .0020
040 –.0005 –.0004 .0005 .0006 +.0005 +.0004 –.0005 –.0010 –.0004 –.0008 .0010 .0020
042 –.0005 –.0005 .0005 .0008 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0020
045 –.0005 –.0005 .0005 .0008 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0020
047 –.0006 –.0005 .0006 .0008 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0022
050 –.0006 –.0005 .0006 .0008 +.0006 +.0005 –.0006 –.0012 –.0005 –.0010 .0012 .0022
055 –.0006 –.0006 .0006 .0009 +.0006 +.0006 –.0006 –.0012 –.0006 –.0012 .0012 .0022
060 –.0006 –.0006 .0006 .0009 +.0006 +.0006 –.0006 –.0012 –.0006 –.0012 .0012 .0022
065 –.0006 –.0006 .0006 .0009 +.0006 +.0006 –.0006 –.0012 –.0006 –.0012 .0012 .0022
070 –.0006 –.0007 .0006 .0010 +.0006 +.0007 –.0006 –.0012 –.0007 –.0014 .0014 .0024
075 –.0007 –.0007 .0008 .0010 +.0007 +.0007 –.0007 –.0014 –.0007 –.0014 .0014 .0024
080 –.0007 –.0007 .0008 .0010 +.0007 +.0007 –.0007 –.0014 –.0007 –.0014 .0014 .0024
090 –.0007 –.0007 .0008 .0010 +.0007 +.0007 –.0007 –.0014 –.0007 –.0014 .0014 .0024
100 –.0008 –.0008 .0010 .0012 +.0008 +.0008 –.0008 –.0016 –.0008 –.0016 .0016 .0026
110 –.0008 –.0008 .0010 .0012 +.0008 +.0008 –.0008 –.0016 –.0008 –.0016 .0016 .0026
120 –.0008 –.0009 .0010 .0014 +.0008 +.0009 –.0008 –.0016 –.0009 –.0018 .0018 .0028
140 –.0008 –.0009 .0012 .0014 +.0008 +.0009 –.0008 –.0016 –.0009 –.0018 .0018 .0028
160 –.0009 –.0010 .0014 .0016 +.0009 +.0010 –.0009 –.0018 –.0010 –.0020 .0020 .0030
180 –.0009 –.0010 .0014 .0016 +.0009 +.0010 –.0009 –.0018 –.0010 –.0020 .0020 .0030
200 –.0010 –.0012 .0016 .0018 +.0010 +.0012 –.0010 –.0020 –.0012 –.0024 .0024 .0034

*Dimetral clearance after installation could vary significantly if bearing, housing, and shaft tolerances are at either end of their range. Shaft and housing diameters are for steel under normal conditions.

TYPE A,C & X - PRECISION CLASS 5 (Ref. ABEC 5F)
Bearing
Size
(All sizes)		 Bearing
Diameters		 Radial & Axial
Runout		 Rotating Shaft
or Duplex DF Mounting		 Stationery Shaft
or Duplex DF Mounting		 Standard
Bearing
Diametral
Clearance*Type X & C Only
Bearing
Bore
Nominal
+.0000		 Bearing
OD
Nominal
+.0000		 Inner
Race		 Outer
Race		 Shaft
Diameter		 Housing
Bore		 Shaft
Diameter		 Housing
Bore
Radial Axial Radial Axial Nominal
+.0000		 Nominal
+.0000		 Nominal Nominal Before
Installation
10 –.0002 –.0002 .0002, .0003 .0002, .0003 +.0002 +.0002 –.0002 –.0004 –.0002 –.0004 .0005 .0009
15 –.0003 –.0002 .0002, .0003 .0002, .0003 +.0002 +.0002 –.0002 –.0004 –.0002 –.0004 .0005 .0009
17 –.0003 –.0003 .0002, .0003 .0003, .0004 +.0003 +.0003 –.0003 –.0006 –.0003 –.0006 .0006 .0012
020 –.0003 –.0003 .0002, .0003 .0003, .0004 +.0003 +.0003 –.0003 –.0006 –.0003 –.0006 .0006 .0012
025 –.0003 –.0003 .0002, .0003 .0003, .0004 +.0003 +.0003 –.0003 –.0006 –.0003 –.0006 .0006 .0012
030 –.0003 –.0003 .0002, .0003 .0004, .0005 +.0003 +.0003 –.0003 –.0006 –.0003 –.0006 .0006 .0012
035 –.0003 –.0003 .0003, .0004 .0004, .0005 +.0003 +.0003 –.0003 –.0006 –.0003 –.0006 .0006 .0012
040 –.0003 –.0003 .0003, .0004 .0004, .0005 +.0003 +.0003 –.0003 –.0016 –.0003 –.0006 .0006 .0012
042 –.0003 –.0004 .0003, .0004 .0004, .0005 +.0003 +.0004 –.0003 –.0006 –.0004 –.0008 .0008 .0014
045 –.0003 –.0004 .0003, .0004 .0004, .0005 +.0004 +.0004 –.0003 –.0006 –.0004 –.0008 .0008 .0014
047 –.0004 –.0004 .0003, .0004 .0004, .0005 +.0004 +.0004 –.0004 –.0008 –.0004 –.0008 .0008 .0014
050 –.0004 –.0004 .0003, .0004 .0004, .0005 +.0004 +.0004 –.0004 –.0008 –.0004 –.0008 .0008 .0014
055 –.0004 –.0005 .0003, .0004 .0005, .0006 +.0004 +.0005 –.0004 –.0008 –.0005 –.0010 .0010 .0016
060 –.0004 –.0005 .0003, .0004 .0005, .0006 +.0004 +.0005 –.0004 –.0008 –.0005 –.0010 .0010 .0016
065 –.0004 –.0005 .0003, .0004 .0005, .0006 +.0004 +.0005 –.0004 –.0008 –.0005 –.0010 .0010 .0016
070 –.0004 –.0005 .0003, .0004 .0005, .0006 +.0004 +.0005 –.0004 –.0008 –.0005 –.0010 .0010 .0016
075 –.0005 –.0005 .0004, .0005 .0005, .0006 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0016
080 –.0005 –.0005 .0004, .0005 .0005, .0006 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0016
090 –.0005 –.0005 .0004, .0005 .0005, .0006 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0016
100 –.0005 –.0005 .0006, .0006 .0006, .0007 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0016
110 –.0005 –.0005 .0006, .0006 .0006, .0008 +.0005 +.0005 –.0005 –.0010 –.0005 –.0010 .0010 .0016
120 –.0005 –.0006 .0006, .0006 .0007, .0008 +.0005 +.0006 –.0005 –.0010 –.0006 –.0012 .0012 .0018
140 –.0006 –.0006 .0006, .0007 .0007, .0008 +.0006 +.0006 –.0006 –.0012 –.0006 –.0012 .0012 .0018
160 –.0006 –.0007 .0007, .0008 .0008, .0009 +.0006 +.0007 –.0006 –.0012 –.0007 –.0014 .0014 .0020
180 –.0006 –.0007 .0007, .0008 .0008, .0009 +.0006 +.0007 –.0006 –.0012 –.0007 –.0014 .0014 .0020
200 –.0007 –.0008 .0008, .0009 .0009, .0010 +.0007 +.0008 –.0006 –.0014 –.0007 –.0016 .0014 .0022

*Dimetral clearance after installation could vary significantly if bearing, housing, and shaft tolerances are at either end of their range. Shaft and housing diameters are for steel under normal conditions.


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