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Technical Date
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Technical Date
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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

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