Standard allowable tolerance grades
GBT307.1	PO	P6	P5	P4	P2
ISO 492	Normal Class	Class6	Class5	Class4	Class2
JIS B 1514	JIS 0 Grade	JIS 6 Grade	JIS 5 Grade	JIS 4 Grade	JIS 2 Grade
AFBMA STD.20	ABEC 1	ABEC 3	ABEC 5	ABEC7	ABEC9

DEEP GROOVE BALL BEARING TOLERANCE CLASS ABEC-1 (P0)

INNER RING

Tolerance in μm.

d mm		Δdmp		Vdp2)			Vdmp	Kia	ΔBs		VBs
				Diameter Series
				9	0,1	2,3,4
over	incl.	high	low	max.			max.	max.	high	low	max.
1)0.6	2.5	0	-8	10	8	6	6	10	0	-40	12
2.5	10	0	-8	10	8	6	6	10	0	-120	15
10	18	0	-8	10	8	6	6	10	0	-120	20
18	30	0	-10	13	10	8	8	13	0	-120	20
30	50	0	-12	15	12	9	9	15	0	-120	20
50	80	0	-15	19	19	11	11	20	0	-150	25
80	120	0	-20	25	25	12	12	25	0	-200	25
120	180	0	-25	31	31	19	19	30	0	-250	30

Notes:
1) 0.6 is included.
2) No values for diameter series 7,8.

OUTER RING

Tolerance in μm.

D mm		ΔDmp		VDp2)4)				VDmp4)	Kea	ΔCs		VCs
				Open		Capped
				Bearings		Bearings2)3)
				Diameter Series
				9	0,1	2,3,4	2,3,4
over	incl.	high	low	max.				max.	max.	high	low	max.
1)2.5	6	0	-8	10	8	6	10	6	15	ldentical to ΔBs and VBs of inner ring of same bearing
6	18	0	-8	10	8	6	10	6	15
18	30	0	-9	12	9	6	12	7	15
30	50	0	-11	14	11	8	16	8	20
50	80	0	-13	16	13	9	20	10	25
80	120	0	-15	19	19	11	26	11	35
120	150	0	-18	23	23	14	30	14	40
150	180	0	-25	31	31	19	38	19	45
180	250	0	-30	38	38	23	-	23	50

Notes:
1) 2.5 is included.
2) No values for diameter series 7,8.
3) No values for diameter series 9,0,1.
4) Fit for before assembling and after disestablishing of snap rings.

Inch-dimension equivalent formula	1 inch = 25.4 mm
	1 mm = 0.0393700787 inch

DEEP GROOVE BALL BEARING TOLERANCE CLASS ABEC-3 (P6)

INNER RING

Tolerance in μm.

d mm		Δdmp		Vdp2)			Vdmp	Kia	ΔBs		VBs
				Diameter Series
				9	0,1	2,3,4
over	incl.	high	low	max.			max.	max.	high	low	max.
1)0.6	2.5	0	-7	9	7	5	5	5	0	-40	12
2.5	10	0	-7	9	7	5	5	6	0	-120	15
10	18	0	-7	9	7	5	5	7	0	-120	20
18	30	0	-8	10	8	6	6	8	0	-120	20
30	50	0	-10	13	10	8	8	10	0	-120	20
50	80	0	-12	15	15	9	9	10	0	-150	25
80	120	0	-15	19	19	11	11	13	0	-200	25
120	180	0	-18	23	23	14	14	18	0	-250	30

Notes:
1) 0.6 is included.
2) No values for diameter series 7,8.

OUTER RING

Tolerance in μm.

D mm		ΔDmp		VDp2)4)				VDmp4)	Kea	ΔCs		VCs
				Open		Capped
				Bearings		Bearings3)
				Diameter Series
				9	0,1	2,3,4	0,1,2,3,4
over	incl.	high	low	max.				max.	max.	high	low	max.
1)2.5	6	0	-7	9	7	5	9	5	8	ldentical to ΔBs and VBs of inner ring of same bearing
6	18	0	-7	9	7	5	9	5	8
18	30	0	-8	10	8	6	10	6	9
30	50	0	-9	11	8	7	13	7	10
50	80	0	-11	14	11	8	16	8	13
80	120	0	-13	16	16	10	20	10	18
120	150	0	-15	19	19	11	25	11	20
150	180	0	-18	23	23	14	30	14	23
180	250	0	-20	25	25	15	-	15	25

Notes:
1) 2.5 is included.
2) No values for diameter series 7,8.
3) No values for diameter series 9.
4) Fit for before assembling and after disestablishing of snap rings. 

Inch-dimension equivalent formula	1 inch = 25.4 mm
	1 mm = 0.0393700787 inch

DEEP GROOVE BALL BEARING TOLERANCE CLASS ABEC-5 (P5)

INNER RING

Tolerance in μm.

d mm		Δdmp		Vdp2)		Vdmp	Kia	Sd	Sia3)	ΔBs		VBs
				Diameter
				Series
				9	0,1,2,3,4
over	incl.	high	low	max.		max.	max.	max.	max.	high	low	max.
1)0.6	2.5	0	-5	5	4	3	4	7	7	0	-40	5
2.5	10	0	-5	5	4	3	4	7	7	0	-40	5
10	18	0	-5	5	4	3	4	7	7	0	-80	5
18	30	0	-6	6	5	3	4	8	8	0	-120	5
30	50	0	-8	8	6	4	5	8	8	0	-120	5
50	80	0	-9	9	7	5	5	8	8	0	-150	6
80	120	0	-10	10	8	5	6	9	9	0	-200	7
120	180	0	-13	13	10	7	8	10	10	0	-250	8

Notes:
1) 0.6 is included.
3) Fit for groove ball bearing only.
2) No values for diameter series 7,8.

OUTER RING

Tolerance in μm.

D mm		ΔDmp		VDp2)3)		VDmp	Kea	SD4)	Sea4)5)	ΔCs		VCs
				Diameter Series
				9	0,1,2,3,4
over	incl.	high	low	max.		max.	max.	max.	max.	high	low	max.
1)2.5	6	0	-5	5	4	3	5	8	8	ldentical to ΔBs of inner ring of same bearing		5
6	18	0	-5	5	4	3	5	8	8			5
18	30	0	-6	6	5	3	6	8	8			5
30	50	0	-7	7	5	4	7	8	8			5
50	80	0	-9	9	7	5	8	8	10			6
80	120	0	-10	10	8	5	10	9	11			8
120	150	0	-11	11	8	6	11	10	13			8
150	180	0	-13	13	10	7	13	10	14			8
180	250	0	-15	15	11	8	15	11	15			10

Notes:
1) 2.5 is included.
2) No values for diameter series 7,8.
3) No values for diameter series 9.
4) No values for shielded and sealed bearings.
5) No values for flanged bearings. 

Inch-dimension equivalent formula	1 inch = 25.4 mm
	1 mm = 0.0393700787 inch

DEEP GROOVE BALL BEARING TOLERANCE CLASS ABEC-7 (P4)

INNER RING

Tolerance in μm.

d mm		Δdmp		Δds		Vdp2)		Vdmp	Kia	Sd	Sia	ΔBs		VBs
						Diameter
						Series
						9,8,9	1,7,2,3,4
over	incl.	high	low	high	low	max.		max.	max.	max.	max.	high	low	max.
1)0.6	2.5	0	-4	0	-4	4	3	2	2.5	3	3	0	-40	2.5
2.5	10	0	-4	0	-4	4	3	2	2.5	3	3	0	-40	2.5
10	18	0	-4	0	-4	4	3	2	2.5	3	3	0	-80	2.5
18	30	0	-5	0	-5	5	4	2.5	3	4	4	0	-120	2.5
30	50	0	-6	0	-6	6	5	3	4	4	4	0	-120	3
50	80	0	-7	0	-7	7	5	3.5	4	5	5	0	-150	4
80	120	0	-8	0	-8	8	6	4	5	5	5	0	-200	4
120	180	0	-10	0	-10	10	8	5	6	6	7	0	-250	5

Notes:
1) 0.6 is included. 
2) Diameter Series 7 refers to those defined by GB273.3 as the miniature bearing series 7.

OUTER RING

Tolerance in μm.

D mm		ΔDmp		ΔDs		VDp2)		VDmp	KCa	SD	Sea	ΔCs	VCs
						Diameter Series
						7,8,9	1,7,2,3,4
over	incl.	high	low	high	low	max.	max.	max.	max.	max.	high	low	max.
1)2.5	6	0	-4	0	-4	4	3	2	3	4	5	ldentical to ΔBs of inner ring of same bearing	2.5
6	18	0	-4	0	-4	4	3	2	3	4	5		2.5
18	30	0	-5	0	-5	5	4	2.5	4	4	5		2.5
30	50	0	-6	0	-6	6	5	3	5	4	5		2.5
50	80	0	-7	0	-7	7	5	3.5	5	4	5		3
80	120	0	-8	0	-8	8	6	4	6	5	6		4
120	150	0	-9	0	-9	9	7	5	7	5	7		5
150	180	0	-10	0	-10	10	8	5	8	5	8		5
180	250	0	-11	0	-11	11	8	6	10	7	10		7

Notes:
1) 2.5 is included.
2) Not applicable for closed type bearings.
3) These windage is applicable for diameter series 1.7.2.3. and 4.
4) Diameter Series 7 refers to those defined by GB273.3 as the miniature bearing series 7. 

Inch-dimension equivalent formula	1 inch = 25.4 mm
	1 mm = 0.0393700787 inch