Tables Test | AST Bearings

ANSI Standard 20	ISO 492	DIN 620
ABEC 1	Class Normal	P0
ABEC 3	Class 6	P6
ABEC 5	Class 5	P5
ABEC 7	Class 4	P4
ABEC 9	Class 2	P2

The following tables list the actual ABEC and RBEC tolerances per ABMA Standard 20. The tables list tolerances for both inner and outer rings, in both inch and metric units. These tables are useful in determining sizes and tolerance for components, such as shafts and housings. The designer should always do a tolerance stack up study at both maximum and least material conditions when sizing components, particularly when designing for miniature ball bearings. Some tolerances have been omitted for clarity. Tolerances for tapered roller bearings can be found in ABMA Standard 19.1 and are not included in these tables.

Table IA

Tolerance Class ABEC-1, RBEC-1

(ISO Class Normal)

Inner Ring

EnglishTolerance values in 0.0001 inch

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-3	4	0	-16	-
2.5	10	0.0984	0.3937	0	-3	4	0	-47	-98
10	18	0.3937	0.7087	0	-3	4	0	-47	-98
18	30	0.7087	1.1811	0	-4	5	0	-47	-98
30	50	1.1811	1.9685	0	-4.5	6	0	-47	-98
50	80	1.9685	3.1496	0	-6	8	0	-59	-150
80	120	3.1496	4.7244	0	-8	10	0	-79	-150
120	180	4.7244	7.0866	0	-10	12	0	-98	-197
180	250	7.0866	9.8425	0	-12	16	0	-118	-197
250	315	9.8425	12.4016	0	-14	20	0	-138	-197
315	400	12.4016	15.7480	0	-16	24	0	-157	-248

MetricTolerance values in micrometers

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-8	10	0	-40	-
2.5	10	0.0984	0.3937	0	-8	10	0	-120	-250
10	18	0.3937	0.7087	0	-8	10	0	-120	-250
18	30	0.7087	1.1811	0	-10	13	0	-120	-250
30	50	1.1811	1.9685	0	-12	15	0	-120	-250
50	80	1.9685	3.1496	0	-15	20	0	-150	-380
80	120	3.1496	4.7244	0	-20	25	0	-200	-380
120	180	4.7244	7.0866	0	-25	30	0	-250	-500
180	250	7.0866	9.8425	0	-30	40	0	-300	-500
250	315	9.8425	12.4016	0	-35	50	0	-350	-500
315	400	12.4016	15.7480	0	-40	60	0	-400	-630

Table IB

Tolerance Class ABEC-1, RBEC-1
(ISO Class Normal)
Outer Ring

EnglishTolerance values in 0.0001 inch

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-3	6	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-3	6
18	30	0.7087	1.1811	0	-3.5	6
30	50	1.1811	1.9685	0	-4.5	8
50	80	1.9685	3.1496	0	-5	10
80	120	3.1496	4.7244	0	-6	14
120	150	4.7244	5.9055	0	-7	16
150	180	5.9055	7.0866	0	-10	18
180	250	7.0866	9.8425	0	-12	20
250	315	9.8425	12.4016	0	-14	24
315	400	12.4016	15.7480	0	-16	28
400	500	15.7480	19.6850	0	-18	31
500	630	19.6850	24.8031	0	-20	39
630	800	24.8031	31.4961	0	-30	47
800	1000	31.4961	39.3701	0	-39	55

MetricTolerance values in micrometers

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-8	15	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-8	15
18	30	0.7087	1.1811	0	-9	15
30	50	1.1811	1.9685	0	-11	20
50	80	1.9685	3.1496	0	-13	25
80	120	3.1496	4.7244	0	-15	35
120	150	4.7244	5.9055	0	-18	40
150	180	5.9055	7.0866	0	-25	45
180	250	7.0866	9.8425	0	-30	50
250	315	9.8425	12.4016	0	-35	60
315	400	12.4016	15.7480	0	-40	70
400	500	15.7480	19.6850	0	-45	80
500	630	19.6850	24.8031	0	-50	100
630	800	24.8031	31.4961	0	-75	120
800	1000	31.4961	39.3701	0	-100	140

Table II A

Tolerance Class ABEC-3, RBEC-3
(ISO Class 6)
Inner Ring

EnglishTolerance values in 0.0001 inch

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-3	2	0	-16	-
2.5	10	0.0984	0.3937	0	-3	2.5	0	-47	-98
10	18	0.3937	0.7087	0	-3	3	0	-47	-98
18	30	0.7087	1.1811	0	-3	3	0	-47	-98
30	50	1.1811	1.9685	0	-4	4	0	-47	-98
50	80	1.9685	3.1496	0	-4.5	4	0	-59	-150
80	120	3.1496	4.7244	0	-6	5	0	-79	-150
120	180	4.7244	7.0866	0	-7	7	0	-98	-197
180	250	7.0866	9.8425	0	-8.5	8	0	-118	-197
250	315	9.8425	12.4016	0	-10	10	0	-138	-197
315	400	12.4016	15.7480	0	-16	24	0	-157	-248

MetricTolerance values in micrometers

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-7	5	0	-40	-
2.5	10	0.0984	0.3937	0	-7	6	0	-120	-250
10	18	0.3937	0.7087	0	-7	7	0	-120	-250
18	30	0.7087	1.1811	0	-8	8	0	-120	-250
30	50	1.1811	1.9685	0	-10	10	0	-120	-250
50	80	1.9685	3.1496	0	-12	10	0	-150	-380
80	120	3.1496	4.7244	0	-15	13	0	-200	-380
120	180	4.7244	7.0866	0	-18	18	0	-250	-500
180	250	7.0866	9.8425	0	-22	20	0	-300	-500
250	315	9.8425	12.4016	0	-25	25	0	-350	-500
315	400	12.4016	15.7480	0	-30	30	0	-400	-630

Table II B

Tolerance Class ABEC-3, RBEC-3
(ISO Class 6)
Outer Ring

EnglishTolerance values in 0.0001 inch

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-3	3	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-3	3
18	30	0.7087	1.1811	0	-3	3.5
30	50	1.1811	1.9685	0	-3.5	4
50	80	1.9685	3.1496	0	-4.5	5
80	120	3.1496	4.7244	0	-5	7
120	150	4.7244	5.9055	0	-6	8
150	180	5.9055	7.0866	0	-7	9
180	250	7.0866	9.8425	0	-8	10
250	315	9.8425	12.4016	0	-10	12
315	400	12.4016	15.7480	0	-11	14
400	500	15.7480	19.6850	0	-13	16
500	630	19.6850	24.8031	0	-20	39
630	800	24.8031	31.4961	0	-18	24
800	1000	31.4961	39.3701	0	-24	30

MetricTolerance values in micrometers

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-7	8	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-7	8
18	30	0.7087	1.1811	0	-8	9
30	50	1.1811	1.9685	0	-9	10
50	80	1.9685	3.1496	0	-11	13
80	120	3.1496	4.7244	0	-13	18
120	150	4.7244	5.9055	0	-15	20
150	180	5.9055	7.0866	0	-18	23
180	250	7.0866	9.8425	0	-20	25
250	315	9.8425	12.4016	0	-25	30
315	400	12.4016	15.7480	0	-28	35
400	500	15.7480	19.6850	0	-33	40
500	630	19.6850	24.8031	0	-38	50
630	800	24.8031	31.4961	0	-45	60
800	1000	31.4961	39.3701	0	-60	75

Table III A

Tolerance Class ABEC-5, RBEC-5
(ISO Class 5)
Inner Ring

EnglishTolerance values in 0.0001 inch

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-2	1.5	0	-16	-98
2.5	10	0.0984	0.3937	0	-2	1.5	0	-16	-98
10	18	0.3937	0.7087	0	-2	1.5	0	-31	-98
18	30	0.7087	1.1811	0	-2.5	1.5	0	-47	-98
30	50	1.1811	1.9685	0	-3	2	0	-47	-98
50	80	1.9685	3.1496	0	-3.5	2	0	-59	-98
80	120	3.1496	4.7244	0	-4	2.55	0	-79	-150
120	180	4.7244	7.0866	0	-5	3	0	-98	-150
180	250	7.0866	9.8425	0	-6	4	0	-118	-197
250	315	9.8425	12.4016	0	-7	5	0	-138	-197
315	400	12.4016	15.7480	0	-9	6	0	-157	-248

MetricTolerance values in micrometers

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-5	4	0	-40	-250
2.5	10	0.0984	0.3937	0	-5	4	0	-40	-250
10	18	0.3937	0.7087	0	-5	4	0	-80	-250
18	30	0.7087	1.1811	0	-6	4	0	-120	-250
30	50	1.1811	1.9685	0	-8	5	0	-120	-250
50	80	1.9685	3.1496	0	-9	5	0	-150	-250
80	120	3.1496	4.7244	0	-10	6	0	-200	-380
120	180	4.7244	7.0866	0	-13	8	0	-250	-380
180	250	7.0866	9.8425	0	-15	10	0	-300	-500
250	315	9.8425	12.4016	0	-18	13	0	-350	-500
315	400	12.4016	15.7480	0	-23	15	0	-400	-630

Table III B

Tolerance Class ABEC-5, RBEC-5
(ISO Class 5)
Outer Ring

EnglishTolerance values in 0.0001 inch

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-2	2	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-2	2
18	30	0.7087	1.1811	0	-2.5	2.5
30	50	1.1811	1.9685	0	-3	3
50	80	1.9685	3.1496	0	-3.5	3
80	120	3.1496	4.7244	0	-4	4
120	150	4.7244	5.9055	0	-4.5	4.5
150	180	5.9055	7.0866	0	-5	5
180	250	7.0866	9.8425	0	-6	6
250	315	9.8425	12.4016	0	-7	7
315	400	12.4016	15.7480	0	-8	8
400	500	15.7480	19.6850	0	-9	9
500	630	19.6850	24.8031	0	-11	10
630	800	24.8031	31.4961	0	-14	12

MetricTolerance values in micrometers

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-5	5	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-5	5
18	30	0.7087	1.1811	0	-6	6
30	50	1.1811	1.9685	0	-6	6
50	80	1.9685	3.1496	0	-9	8
80	120	3.1496	4.7244	0	-10	10
120	150	4.7244	5.9055	0	-11	11
150	180	5.9055	7.0866	0	-13	13
180	250	7.0866	9.8425	0	-15	15
250	315	9.8425	12.4016	0	-18	18
315	400	12.4016	15.7480	0	-20	20
400	500	15.7480	19.6850	0	-23	23
500	630	19.6850	24.8031	0	-28	25
630	800	24.8031	31.4961	0	-35	30

Table IV A

Tolerance Class ABEC-7, RBEC-7
(ISO Class 4)
Inner Ring

EnglishTolerance values in 0.0001 inch

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-1.5	1	0	-16	-98
2.5	10	0.0984	0.3937	0	-1.5	1	0	-16	-98
10	18	0.3937	0.7087	0	-1.5	1	0	-31	-98
18	30	0.7087	1.1811	0	-2	1	0	-47	-98
30	50	1.1811	1.9685	0	-2.5	1.5	0	-47	-98
50	80	1.9685	3.1496	0	-3	1.5	0	-59	-98
80	120	3.1496	4.7244	0	-3	2	0	-79	-150
120	180	4.7244	7.0866	0	-4	2.5	0	-98	-150
180	250	7.0866	9.8425	0	-4.5	3	0	-118	-197

MetricTolerance values in micrometers

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-4	2.5	0	-40	-250
2.5	10	0.0984	0.3937	0	-4	2.5	0	-40	-250
10	18	0.3937	0.7087	0	-4	2.5	0	-80	-250
18	30	0.7087	1.1811	0	-5	3	0	-120	-250
30	50	1.1811	1.9685	0	-6	4	0	-120	-250
50	80	1.9685	3.1496	0	-7	4	0	-150	-250
80	120	3.1496	4.7244	0	-8	5	0	-200	-380
120	180	4.7244	7.0866	0	-10	6	0	-250	-380
180	250	7.0866	9.8425	0	-12	8	0	-300	-500

Table IV B

Tolerance Class ABEC-7, RBEC-7
(ISO Class 4)
Outer Ring

EnglishTolerance values in 0.0001 inch

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-1.5	1	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-1.5	1
18	30	0.7087	1.1811	0	-2	1.5
30	50	1.1811	1.9685	0	-2.5	2
50	80	1.9685	3.1496	0	-3	2
80	120	3.1496	4.7244	0	-3	2.5
120	150	4.7244	5.9055	0	-3.5	3
150	180	5.9055	7.0866	0	-4	3
180	250	7.0866	9.8425	0	-4.5	4
250	315	9.8425	12.4016	0	-5	4.5
315	400	12.4016	15.7480	0	-6	5

MetricTolerance values in micrometers

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-4	3	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-4	3
18	30	0.7087	1.1811	0	-5	4
30	50	1.1811	1.9685	0	-6	5
50	80	1.9685	3.1496	0	-7	5
80	120	3.1496	4.7244	0	-8	6
120	150	4.7244	5.9055	0	-9	7
150	180	5.9055	7.0866	0	-10	8
180	250	7.0866	9.8425	0	-11	10
250	315	9.8425	12.4016	0	-13	11
315	400	12.4016	15.7480	0	-15	13

Table V A

Tolerance Class ABEC-9, RBEC-9
(ISO Class 2)
Inner Ring

EnglishTolerance values in 0.0001 inch

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-1	0.5	0	-16	-98
2.5	10	0.0984	0.3937	0	-1	0.5	0	-16	-98
10	18	0.3937	0.7087	0	-1	0.5	0	-31	-98
18	30	0.7087	1.1811	0	-1	1	0	-47	-98
30	50	1.1811	1.9685	0	-1	1	0	-47	-98
50	80	1.9685	3.1496	0	-1.5	1	0	-59	-98
80	120	3.1496	4.7244	0	-2	1	0	-79	-150
120	150	4.7244	5.9055	0	-3	1	0	-98	-150
150	180	5.9055	7.0866	0	-3	2	0	-98	-150
180	250	7.0866	9.8425	0	-3	2	0	-118	-197

MetricTolerance values in micrometers

Bore Diameter (d)				Bore Tolerance (Δdmp)		Radial Runout (Kia)	Width Tolerance (ΔBS)
mm		inch		Bore Tolerance (Δdmp)		Radial Runout (Kia)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
0.6	2.5	0.0236	0.0984	0	-2.5	1.5	0	-40	-250
2.5	10	0.0984	0.3937	0	-2.5	1.5	0	-40	-250
10	18	0.3937	0.7087	0	-2.5	1.5	0	-80	-250
18	30	0.7087	1.1811	0	-2.5	2.5	0	-120	-250
30	50	1.1811	1.9685	0	-2.5	2.5	0	-120	-250
50	80	1.9685	3.1496	0	-4	2.5	0	-150	-250
80	120	3.1496	4.7244	0	-5	2.5	0	-200	-380
120	150	4.7244	5.9055	0	-7	2.5	0	-250	-380
150	180	5.9055	7.0866	0	-7	5	0	-250	-380
180	250	7.0866	9.8425	0	-8	5	0	-300	-500

Table V B

Tolerance Class ABEC-9, RBEC-9
(ISO Class 2)
Outer Ring

EnglishTolerance values in 0.0001 inch

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-1	0.5	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-1	0.5
18	30	0.7087	1.1811	0	-1	0.5
30	50	1.1811	1.9685	0	-1.5	1
50	80	1.9685	3.1496	0	-1.5	1.5
80	120	3.1496	4.7244	0	-2	2
120	150	4.7244	5.9055	0	-2	2
150	180	5.9055	7.0866	0	-3	2
180	250	7.0866	9.8425	0	-3	3
250	315	9.8425	12.4016	0	-3	3
315	400	12.4016	15.7480	0	-4	3

MetricTolerance values in micrometers

Outer Diameter (D)				Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	Width Tolerance (ΔBS)
mm		inch		Outer Dia. Tolerance (Δdmp)		Radial Runout (Kea)	all	single bearing	paired bearings
over	incl.	over	incl.	high	low	max.	high	low
2.5	6	0.0984	0.2362	0	-2.5	1.5	Identical to Width Tolerance (ΔBS) of Inner Ring of the same Bearing
6	18	0.2362	0.7087	0	-2.5	1.5
18	30	0.7087	1.1811	0	-4	2.5
30	50	1.1811	1.9685	0	-4	2.5
50	80	1.9685	3.1496	0	-4	4
80	120	3.1496	4.7244	0	-5	5
120	150	4.7244	5.9055	0	-5	5
150	180	5.9055	7.0866	0	-7	5
180	250	7.0866	9.8425	0	-8	7
250	315	9.8425	12.4016	0	-8	7
315	400	12.4016	15.7480	0	-10	8