Tolerance, Class, Chamfer Dimension of Bearings(ISO)

Tolerance of Inner Ring(ISO)

d(mm) Δdmp Δds Vdp Vdmp
P0   P6 P5 P4 P4 P0 P6 P5 P4 P0 P6 P5 P4
diameter series diameter series diameter series diameter series diameter series
0,2,3 7,8,9  0  2,3 7,8,9  0  2,3 7,8,9 0,2,3 7,8,9 0,2,3
over incl. upper lower lower lower lower upper lower max. max. max. max. max. max. max. max.
0.6 2.5 0 -8 -7 -5 -4 0 -4 10 8 6 9 7 5 5 4 4 3 6 5 3 2
2.5 10 0 -8 -7 -5 -4 0 -4 10 8 6 9 7 5 5 4 4 3 6 5 3 2
10 18 0 -8 -7 -5 -4 0 -4 10 8 6 9 7 5 5 4 4 3 6 5 3 2
18 30 0 -10 -8 -6 -5 0 -5 13 10 8 10 8 6 6 5 5 4 8 6 3 2.5
30 50 0 -12 -10 -8 -6 0 -6 15 12 9 13 10 8 8 6 6 5 9 8 4 3

Remark 1: The upper value of bore diameter in this table is not applicable when the distance from the bearing ing face is less than 1.2 times the chamfer dimension rsmax
Remark 2: According to the revision of ANSI/ABMA Std.20-1996, the class ABEC-1(P0), ABEC-3(P6), ABEC-5(P5), ABEC-7(P4) are equivalent to CLASS0, CLASS6,CLASS5,CLASS4.

ΔBs/ΔCs VBs/VCs Kia Sd Sia d(mm)
single bearing inner/outer ring inner/outer ring P0 P6 P5 P4 P5 P4 P5 P4
  P0
P6		 P5
P4		 P0 P6 P5 P4
upper lower lower max. max. max. max. max. max. max. max. max. max. max. max. Over Incl
0 -40 -40 12 12 5 2.5 10 5 4 2.5 7 3 7 3 0.6 2.5
0 -120 -40 15 15 5 2.5 10 6 4 2.5 7 3 7 3 2.5 10
0 -120 -80 20 20 5 2.5 10 7 4 2.5 7 3 7 3 10 18
0 -120 -120 20 20 5 2.5 13 8 4 3 8 4 8 4 18 30
0 -120 -120 20 20 5 3 15 10 5 4 8 4 8 4 30 50

Note(1):0.6mm is included in this classification.
Note(2):The inner ring width variation is same for the outer ring of the same bearing size. CLASS5 AND CLASS4 referring to outer ring only.

Tolerance of Outer Ring(ISO)

D(mm)

 ΔDmp ΔDs VDp VDmp
  P0 P6 P5 P4 P4 P0 P6 P5 P4 P0 P6 P5 P4
open

seal
shield

 open seal
shield		 open open
diameter series diameter series diameter series diameter series diameter series
0,2,3 7,8,9  0  2,3 2,3 7,8,9 0 2,3 2,3 7,8,9 0,2,3 7,8,9 0,2,3
over incl. upper lower lower lower lower upper lower max. max. max. max. max. max. max. max.
2.5 6 0 -8 -7 -5 -4 0 -4 10 8 6 10 9 7 5 9 5 4 4 3 6 5 3 2
6 18 0 -8 -7 -5 -4 0 -4 10 8 6 10 9 7 5 9 5 4 4 3 6 5 3 2
18 30 0 -9 -8 -6 -5 0 -5 12 9 7 12 10 8 6 10 6 5 5 4 7 6 3 2.5
30 50 0 -11 -9 -7 -6 0 -6 14 11 8 16 11 9 7 13 7 5 6 5 8 7 4 3
50 80 0 -13 -11 -9 -7 0 -7 16 13 10 20 14 11 8 16 9 7 7 5 10 8 5 3.5

Remark 1: The upper value of bore diameter in this table is not applicable when the distance from the bearing ing face is less than 1.2 times the chamfer dimension rsmax Remark 2: According to the revision of ANSI/ABMA Std.20-1996, the class ABEC-1(P0), ABEC-3(P6), ABEC-5(P5), ABEC-7(P4) are equivalent to CLASS0, CLASS6,CLASS5,CLASS4.

Kea SD Sea VCs D(mm Flanged type d(mm) Flanged type
P0 P6 P5 P4 P5 P4 P5 P4 P5 P4 ΔDfs ΔCfs
P0, P6 P5, P4 P0, P6 P5, P4
Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Over Incl. upper lower upper lower Over Incl. upper lower upper lower
15 8 5 3 8 4 8 5 5 2.5 - 10 +220 -36 0 -36 0.6 2.5 0 -40 0 -40
15 8 5 3 8 4 8 5 5 2.5 10 18 +270 -43 0 -43 2.5 10 0 -120 0 -40
15 9 6 4 8 4 8 5 5 2.5 18 30 +330 -52 0 -52 10 18 0 -120 0 -80
20 10 7 5 8 4 8 5 5 2.5 30 50 +390 -62 0 -62 18 30 0 -120 0 -120
25 13 8 5 8 4 10 5 6 3 50 80 +460 -74 0 -74 30 50 0 -120 0 -120

Note: 1. Size 2.5mm is included in this classification.
          2. Applicable without locating snap ring.
          3. The outer ring width variations for CLASS0 and CLASS6 are same as for the inner ring of the same bearing size.

Tolerance of Inner Ring and Outer Ring Width(ABMA)

d(mm) Δdmp Δds Vdp Vdmp ΔBs/ΔCs VBs Kia Sia Sd
ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 single bearing ABEC5P ABEC7P ABEC5P ABEC7P ABEC5P ABEC7P ABEC5P ABEC7P
ABEC5P
ABEC7P
Over Incl. upper lower upper lower Max. Max. upper lower Max. Max. Max. Max. Max. Max. Max. Max.
- 10 0 -5 0 -5 2.5 2.5 0 -25 5 2.5 3.5 2.5 7 3 7 3
10 18 0 -5 0 -5 2.5 2.5 0 25 5 2.5 3.5 2.5 7 3 7 3
18 30 0 -5 0 -5 2.5 2.5 0 25 5 2.5 3.5 2.5 7 3 7 3

Remark: ABEC5P and ABEC7P are the tolerance classes for high precision bearings.

D(mm) ΔDmp ΔDs VDp/VDmp
Open seal, Shield open seal,shield
ABEC5P
ABEC7P		 ABEC5P ABEC7P ABEC5P
ABEC7P		 ABEC5P ABEC7P ABEC5P
ABEC7P		 ABEC5P ABEC7P ABEC5P
ABEC7P		 ABEC5P
ABEC7P
Over Incl. upper lower lower upper   lower upper lower lower Max. Max.
- 18 0 -5 -5 0 -5 -5 +1 -6 -6 2.5 5
18 30 0 -6 -5 0 -6 -5 +1 -7 -6 2.5 5
30 50 0 -6 -5 0 -6 -5 +1 -7 -6 2.5 5

ΔBs/ΔCs VCs SD Kea Sea Flanged type D(mm)
single bearing ABEC5P ABEC7P ABEC5P ABEC7P ABEC5P ABEC7P ABEC5P ABEC7P ΔDfs ΔCfs Seal
ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P ABEC7P
upper lower Max. Max. Max. Max. Max. Max. Max. Max. upper lower upper lower Max. Max. Over Incl.
0 -25 5 2.5 8 4 5 3.5 8 4 0 -25 0 -51 7.5 5 - 18
0 -25 5 2.5 8 4 6 4 8 4 0 -25 0 -51 7.5 5 18 30
0 -25 5 2.5 8 4 6 4 8 4 0 -25 0 -51 7.5 5 30 50

Note:1. Applies to flange width variation of flanged bearing.    2. Applies to flange back face.

Limit Tolerance Values(Metric) of Chamfer Dimensions of Radial Bearings

rsmin d(mm) rsmax ramax Bearings Chamfer
rs min=smallest permissible single chamfer dimension (minimum limit) rs max=largest permissible single chamfer dimension (maximum limit) ra min=largest permissible single shaft and housing fillet radius
Over Incl. Radial Axial
0.05 - - 0.10 0.20 0.05
0.08 - - 0.16 0.30 0.08
0.10 - - 0.20 0.40 0.10
0.15 - - 0.30 0.60 0.15
0.20 - - 0.50 0.80 0.20
0.30 - 40 0.60 1.00 0.30
0.30 40 - 0.80 1.00 0.30
0.60 - 40 1.00 2.00 0.60
0.60 40 - 1.30 2.00 0.60
1.00 - 50 1.50 3.00 1.00
1.00 50 - 1.90 3.00 1.00
1.10 - 120 2.00 3.50 1.00
1.10 120 - 2.50 4.00 1.00
1.50 - 120 2.30 4.00 1.50
1.50 120 - 3.00 5.00 1.50

NOTE: 1.The exact shape of the chamfer surface is not specified, but its contour in an axial plane shall not be allowed to project beyond the imaginary circular arc, of radius rsmin , tangential to the ring face and the bore or outside cylindrical surface of the ring

More… please see,
Bearing Tolerance(ABEC Grade) definitions and Tolerance Class exchange and Tolerance symbol

Bearing Material - Bearing Closures - Lubricants - Noise - Internal Clearance - Retainer(cage) - Tolerance

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