Home Technology Ball Bearing Technical Information Ball Bearing Tolerance, Class, Chamfer Dimension

Ball Bearing Tolerance, Class, Chamfer Dimension

Tolerances of inner ring and outer ring width of radial ball bearings
Unit μm
Nominal bore diameter
d(mm)		 Single plane mean bore diameter deviation
Δdmp 		Deviation of a single bore diameter
Δds 		Bore diameter variation in single plane
Vdsp 		Mean bore diameter variation
Vdmp
P0 P6 P5 P4 P4 P0 P6 P5 P4 P0 P6 P5 P4
Diameter series Diameter series Diameter series Diameter series Diameter series
0,1,2,3 7,8,9 0,1 2,3 7,8,9 0,1 2,3 7,8,9 0,1,2,3 7,8,9 0,1,2,3
Over or less Upper Lower Lower Lower Lower Upper Lower Max. Max. Max. Max. Max. Max. Max. Max.
0.6（1） 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
50 80 0 -15 -12 -9 -7 0 -7 19 19 11 15 15 9 9 7 7 5 11 9 5 3.5
80 120 0 -20 -15 -10 -8 0 -8 25 25 15 19 19 11 10 8 8 6 15 11 5 4
120 180 0 -25 -18 -13 -10 0 -10 31 31 19 23 23 14 13 10 10 8 19 14 7 5
Unit μm
Nominal bore diameter
d(mm)		 Deviation of a single inner ring
(or outer ring) width (2)
ΔBs(orΔCs)

Inner ring (or outer ring) width variation (2)
and variation of outer ring flange width (2)
VBs (or VCs) and VCls

Radial runout of assembled bearing inner ring
Kia		 Inner ring reference face (back face, where applicable) runout with bore
Sd 		Assembled bearing inner ring face (back face) runout with raceway
Sia
Single bearing Duplex bearing Inner ring
(or outer ring)		 Inner ring P0 P6 P5 P4 P5 P4 P5 P4
P0 P5 P0 P5 P0　 P6　 P5　 P4　
P6 P4 P6 P4
{:lang('Over or less Upper Lower Lower Upper Lower Lower Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max.
0.6(1) 2.5 0 -40 -40 - - - 12 12 5 2.5 10 5 4 2.5 7 3 7 3
2.5 10 0 -120 -40 0 -250 -250 15 15 5 2.5 10 6 4 2.5 7 3 7 3
10 18 0 -120 -80 0 -250 -250 20 20 5 2.5 10 7 4 2.5 7 3 7 3
18 30 0 -120 -120 0 -250 -250 20 20 5 2.5 13 8 4 3 8 4 8 4
30 50 0 -120 -120 0 -250 -250 20 20 5 3 15 10 5 4 8 4 8 4
50 80 0 -150 -150 0 -380 -250 25 25 6 4 20 10 5 4 8 5 8 5
80 120 0 -200 -200 0 -380 -380 25 25 7 4 25 13 6 5 9 5 9 5
120 180 0 -250 -250 0 -500 -380 30 30 8 5 30 18 8 6 10 6 10 7
  • Notes
  • (1) 0.6 mm is included in this dimension classification.
  • (2) The deviation and variation of the outer ring width are determined based on the inner ring values of the same bearing. The variation of the outer ring width of P5 and P4 is obtained from the table "Tolerance of outer ring of radial ball bearings" below.
  • Remarks
  • The upper tolerance of the bearing bore diameter defined in this table is not applicable to the distance within 1.2 times the chamfer dimension
  • ABEC1, ABEC3, ABEC5 and ABEC7 of the inch series is equivalent to P0, P6, P5 and P4 of the metric series, respectively.
  • Please contact our company when the tolerance class is P2 or the tolerance is not indicated in the above table.
Tolerances of outer ring of radial ball bearings
Unit μm
Nominal bore diameter
d(mm)		 Single plane mean bore diameter deviation
Δdmp 		Deviation of a single bore diameter
Δds 		Bore diameter variation in single plane
Vdsp 		Mean bore diameter variation
Vdmp
P0 P6 P5 P4 P4 P0 P6 P5 P4 P0 P6 P5 P4
Diameter series Diameter series Diameter series Diameter series Diameter series
0,1,2,3 7,8,9 0,1 2,3 7,8,9 0,1 2,3 7,8,9 0,1,2,3 7,8,9 0,1,2,3
Over or less Upper Lower Lower Lower Lower Upper Lower Max. Max. Max. Max. Max. Max. Max. Max.
0.6（1） 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
50 80 0 -15 -12 -9 -7 0 -7 19 19 11 15 15 9 9 7 7 5 11 9 5 3.5
80 120 0 -20 -15 -10 -8 0 -8 25 25 15 19 19 11 10 8 8 6 15 11 5 4
120 180 0 -25 -18 -13 -10 0 -10 31 31 19 23 23 14 13 10 10 8 19 14 7 5
Unit μm
Nominal outside diameter
D(mm)		 Radial runout of assembled bearing outer ring
Kea		 Variation of bearing outside surface generatrix inclination with outer ring reference face (back face)
SD		 Assembled bearing outer ring face (back face) runout with raceway
Sea		 Axial runout of outer ring flange back face of assembled bearing
Seal		 Outer ring width variation (3) and variation of outer ring flange width (3)
VCs VCls
P0 P6 P5 P4 P5 P4 P5 P4 P5 P4 P5 P4
Over or less Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max.
2.5(1) 6 15 8 5 3 8 4 8 5 11 7 5 2.5
6 18 15 8 5 3 8 4 8 5 11 7 5 2.5
18 30 15 9 6 4 8 4 8 5 11 7 5 2.5
30 50 20 10 7 5 8 4 8 5 11 7 5 2.5
50 80 25 13 8 5 8 4 10 5 14 7 6 3
80 120 35 18 10 6 9 5 11 6 16 8 8 4
120 150 40 20 11 7 10 5 13 7 18 10 8 5
150 180 45 23 13 8 10 5 14 8 20 11 8 5
Unit μm
Nominal flange outside diameter
D1(mm)		 Deviation of a single outside diameter of outer ring flange ΔDls
P0
P6		 P5
P4
Over or less Upper Lower Upper Lower
2.5(1) 6 125 -50 0 -25
6 18 125 -50 0 -25
18 30 125 -50 0 -52
30 50 125 -50 0 -62
50 80 460 -74 0 -74
80 120 540 -87 0 -87
120 150 630 -100 0 -100
150 180 630 -100 0 -100
Unit μm
Nominal bore diameter
d(mm)		 Deviation of a single outer ring flange width ΔCls
P0　P5
P6　P4
Over or less Upper Lower
0.6(1) 2.5 0 -50
2.5 10 0 -50
10 18 0 -50
18 30 0 -50
30 50 0 -120
50 80 0 -150
80 120 0 -200
120 150 0 -250

Note:

(1) 2.5 mm is included in this dimension classification.
(2) This is applicable when the snap ring is not mounted.
(3) The width variation of the outer ring of P0 and P6 is based on the tolerance of the inner ring.

Remarks
  1. The lower tolerance of the bearing outside diameter defined in this table is not applicable to the distance within 1.2 times the chamfer dimension rsmaxfrom the the ring face.
  2. ABEC1, ABEC3, ABEC5 and ABEC7 of the inch series is equivalent to P0, P6, P5 and P4 of the metric series, respectively.
  3. Please contact our company when the tolerance class is P2 or the tolerance is not indicated in the above table.
Tolerances of inner ring and outer ring width of radial ball bearings (high-precision instrument ball bearings)
Unit μm
Nominal bore diameter
d(mm)		 Single plane mean bore diameter deviation
Δdmp		 Deviation of a single bore diameter
Δds 		Bore diameter variation in single plane
Vdsp		 Mean bore diameter variation
Vdmp		 Deviation of a single inner ring width
ΔBs		 Inner ring width variation
ΔBs		 Radial runout of assembled bearing inner ring
Kia		 Assembled bearing inner ring face (back face) runout with raceway
Sia		 Inner ring reference face (back face, where applicable) runout with bore
Sd
ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC
5P		 ABEC
7P		 ABEC
5P		 ABEC
7P		 ABEC
5P		 ABEC
7P		 ABEC
5P		 ABEC
7P
Over or less Upper Lower Upper Lower Max. Max. Upper Lower Max. Max. Max. Max.
- 10 0 -5.1 0 -5.1 2.5 2.5 0 -25.4 5.1 2.5 3.8 2.5 7.6 2.5 7.6 2.5
10 18 0 -5.1 0 -5.1 2.5 2.5 0 -25.4 5.1 2.5 3.8 2.5 7.6 2.5 7.6 2.5
18 30 0 -5.1 0 -5.1 2.5 2.5 0 -25.4 5.1 2.5 3.8 3.8 7.6 3.8 7.6 3.8
Tolerances of outer ring of radial ball bearings (high-precision instrument ball bearings)
Unit μm
Nominal outer diameter
D(mm)		 Single plane mean bore diameter deviation
ΔDmp		 Deviation of a single outside diameter
ΔDs		 Outside diameter variation in a single radial plane (2)
VDsp		 Mean outside diameter variation
VDmp		 Deviation of a single outer ring width
ΔCs		 Outer ring width variation (1)
VCs		 Variation of bearing outside surface generatrix inclination with outer ring reference face (back face)
SD		 Radial runout of assembled bearing outer ring
Kea		 Assembled bearing outer ring face (back face) runout with raceway
Sea
Open type Sealed type ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC
5P		 ABEC
7P		 ABEC
5P		 ABEC
7P		 ABEC
5P		 ABEC
7P		 ABEC
5P		 ABEC
7P
ABEC5P
ABEC7P		 ABEC5P
ABEC7P		 ABEC5P
ABEC7P
Open type Sealed type Open type Sealed type
Over or less Upper Lower Upper Lower Upper Lower Max. Max. Max. Max. Upper Lower Max. Max. Max. Max. Max. Max. Max. Max.
- 18 0 -5.1 0 -5.1 +1.0 -6.1 2.5 5.1 2.5 5.1 0 -25.4 5.1 2.5 7.6 3.8 5.1 3.8 7.6 5.1
18 30 0 -5.1 0 -5.1 +1.0 -6.1 2.5 5.1 2.5 5.1 0 -25.4 5.1 2.5 7.6 3.8 5.1 3.8 7.6 5.1
30 50 0 -5.1 0 -5.1 +1.0 -6.1 2.5 5.1 2.5 5.1 0 -25.4 5.1 2.5 7.6 3.8 5.1 5.1 7.6 5.1
Unit μm
Nominal outer diameter D(mm) Deviation of a single outside diameter of outer ring flangeΔDls Deviation of a single outer ring flange widthΔCls Variation of outer ring flange widthVCls Axial runout of outer ring flange back face of assembled bearingSeal
ABEC5P ABEC7P ABEC5P ABEC7P ABEC5P ABEC7P ABEC5P ABEC7P
Over or less Upper Lower Upper Lower Max. Max. Max.
- 18 0 -25.4 0 -50.8 5.1 2.5 7.6
18 30 0 -25.4 0 -50.8 5.1 2.5 7.6
30 50 0 -25.4 0 -50.8 5.1 2.5 7.6
Notes

(1) This is also applicable to the flange width variation of a flanged bearing.

Remarks
  1. ABEC5P and ABEC7P is the tolerance and class of high-precision instrument ball bearings.
  2. Please contact our company when the tolerance class is ABEC9P or the tolerance is not indicated in the above table.
Selection Criteria of Tolerance
Required Function Application Examples Tolerance Class
General precision Small-size motors, gear mechanisms, cam mechanisms, generators, stepper motor, pinch rollers, printers, copy mechanisms and measuring instruments P0、P6、ABEC1、ABEC3
Low torque and slight torque fluctuation High frequency spindles, servomotors, potentiometers, gyroscope gimbals P4、ABEC7P
High-speed operation Turbochargers, centrifugal separators, dental drill spindles, high frequency spindles, tension reels P5、P4、ABEC5P、ABEC7P
High rotational accuracy Hard disk motors, encoders, polygon mirror motors, synchronous motors, machine tool spindles P5、P4、ABEC5P、ABEC7P
Corrosion resistance Dental drill spindles, surgery assist robots, in vitro fertilization device, peristalsis pumps P5、P4、ABEC5P、ABEC7P
Food processors, food and beverage filling machines, electric adjustable beds, robot suits for nursing care P0、P6、ABEC1、ABEC3
Chamfer Dimensions Limits for Radial Bearings
Permissible chamfer dimensions of inner/outer rings
rsmin		 Nominal bore diameter
d(mm)		 Permissible chamfer dimensions of inner/outer rings
rsmax		 (Reference) Radius of rounded corners of shafts or housings
ramax
Over or less Radial direction Axial direction
0.05 - - 0.1 0.2 0.05
0.08 - - 0.16 0.3 0.08
0.1 - - 0.2 0.4 0.1
0.15 - - 0.3 0.6 0.15
0.2 - - 0.5 0.8 0.2
0.25 - - 0.55 0.9 0.25
0.3 - 40 0.6 1 0.3
0.3 - 40 0.6 1 0.3
0.4 - - 0.7 1.1 0.4
0.5 - - 0.9 1.2 0.5
0.6 - 40 1 2 0.6
0.6 - 40 1 2 0.6
0.8 - - 1.2 2.2 0.8
1 - 50 1.5 3 1
1 - 50 1.5 3 1
1.1 - 120 2 3.5 1
1.5 - 120 2.3 4 1.5
1.5 - 120 2.3 4 1.5