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Technical Data


Abec Tolerances



PRECISION CLASSES AND TOLERANCES

ISO 492 DIN 620 ANSI/AFBMA
Std. 20
Class Normal = P0 = ABEC 1
Class 6 = P6 = ABEC 3
Class 5 = P5 = ABEC 5
Class 4 = P4 = ABEC 7
Class 2 = P2 = ABEC 9


INNER RING TOLERANCE — ABEC 3-ABEC 1, VALUES ARE IN .0001"

BORE DIAMETER BORE TOLERANCE
+0
RADIAL RUNOUT WIDTH TOLERANCES
+0
MM INCH ABEC
3
ABEC
1
ABEC
3
ABEC
1
ABEC
3
ABEC
1
OVER INCL. OVER INCL.
0.6 2.5 .0236 .0984 -3 -3 2 4 -16 -16
2.5 10 .0984 .3937 -3 -3 2.5 4 -47 -47
10 18 0.3937 0.7087 -3 -3 3 4 -47 -47
18 30 0.7087 1.1811 -3 -4 3 5 -47 -47
30 50 1.1811 1.9685 -4 -4.5 4 6 -47 -47
50 80 1.9685 3.1496 -4.5 -6 4 8 -59 -59
80 120 3.1496 4.7244 -6 -8 5 10 -79 -79

INNER RING TOLERANCE — ABEC 7P — ABEC 5P, VALUES ARE IN .0001"

BORE DIAMETER BORE
TOLERANCE
+0
RADIAL
RUNOUT
(MAX.)
WIDTH
VARIATION
(MAX.)
REFERENCE
RUNOUT WITH
BORE (MAX.)
MM
OVER
MM
INCL.
INCH
OVER
INCH
INCL.
APEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
0 10 0 0.3937 -1.5 -2 1 1.5 1 2 1 3
10 18 0.3937 0.7087 -1.5 -2 1 1.5 1 2 1 3
18 30 0.7087 1.1811 -1.5 -2 1.5 1.5 1 2 1.5 3
30 50 1.1811 1.9685 -2 -2 1.5 2 1 2 1.5 3
50 80 1.9865 3.1496 -2 -3 1.5 2 1.5 2 2 3
80 120 3.1496 4.7244 -2.5 -3 2 2.5 1.5 3 2 3

INNER RING TOLERANCES — ABEC 5P AND ABEC 7P

GROOVE RUNOUT
WIDTH REFERENCE
SIDE (MAX.)
WIDTH
TOLERANCES
+0
BORE 2-POINT
OUT-OF-ROUND
(MAX.)
BORE
TAPER
(MAX.)
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
1 3 -10 -10 1 1 1 1
1 3 -10 -10 1 1 1 1
1.5 3 -10 -10 1 1 1 1
1.5 3 -10 -10        
1.5 3 -10 -15        
2 4 -15 -15        


OUTER RING TOLERANCE — ABEC 3 — ABEC 1 VALUES ARE IN .0001"

OUTER DIAMETER OUTER
DIAMETER
TOLERANCE
LIMIT +0
RADIAL
RUNOUT
WIDTH
TOLERANCES
+0
FLANGE
WIDTH
TOLERANCE
LIMITS
+0
FLANGE
DIAMETER
TOLERANCE
LIMITS
+50
MM INCH ABEC
3
ABEC
1
ABEC
3
ABEC
1
ABEC
3
ABEC
1
ABEC
3
ABEC
1
ABEC
3
ABEC
1
OVER INCL. OVER INCL.
0 18 0 0.7087 -3 -3 3 6 -47 -47 0 -47(2) +106(1) -17(1)
18 30 0.7087 1.1811 -3 -3.5 4 6 -47 -47 0 -47 +130 -20
30 50 1.1811 1.9685 -3.5 -4.5 4 8 -47 -47 0 -47 +154 -24
50 80 1.9685 3.1496 -4.5 -5 5 10 -47 -47 0 -47 +181 -29
80 120 3.1496 4.7244 -5 -6 7 14 -59 -59 0 -47 +213 -34
120 150 4.7244 5.9055 -6 -7 8 16 -79 -79        

(1) 0-10mm bore, High=+87, Low=-14    (2) 0-10mm, Low=-16


OUTER RING TOLERANCE — ABEC 7P — ABEC 5P, VALUES ARE IN .0001"

OUTER DIAMETER OUTER
DIAMETER
TOLERANCE
+0
RADIAL
RUNOUT
(MAX.)
WIDTH
VARIATION
(MAX.)
OUTSIDE
CYLINDRICAL
SURFACE RUNOUT
WITH REFERENCE
SIDE (MAX.)
MM
OVER
MM
INCL.
INCH
OVER
INCH
INCL.
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
0 18 0 0.7087 -2 -2 1.5 2 1 2 1.5 3
18 30 0.7087 1.1811 -2 -2 1.5 2 1 2 1.5 3
30 50 1.1811 1.9685 -2 -2 2 2 1 2 1.5 3
50 80 1.9685 3.1496 -2 -3 2 3 1 2 1.5 3
80 120 3.1496 4.7244 -3 -3 2 4 2 3 2 3
120 150 4.7244 5.9055 -4 -4 3 4 3 3 2 4

OUTER RING TOLERANCES — ABEC 5P AND ABEC 7P

GROOVE RUNOUT
WIDTH REFERENCE
SIDE (MAX.)
WIDTH
TOLERANCES
+0
FLANGE WIDTH
TOLERANCE
LIMITS
+0
FLANGE
DIAMETER
TOLERANCE
LIMITS +0
OUTER DIAMETER
2 POINT
OUT-OF-ROUND
(MAX.)
OUTER DIAMETER
TAPER
(MAX.)
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
2 3 -10 -10 -20 -20 -10 -10 1 1 1 1
2 3 -10 -10 -20 -20 -10 -10 1 1 1 1
2 3 -10 -10 -20 -20 -10 -10 1 1 1 1
2 4 -10 -15                
2 5 -15 -15                
3 5 -15 -15                

ABEC 9 specification available upon request.
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