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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 |
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| 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) |
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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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
- 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.
- 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 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 |
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| 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 |
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| 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 |
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| 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 |
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| ABEC5P ABEC7P |
ABEC5P ABEC7P |
ABEC5P ABEC7P |
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| 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
- ABEC5P and ABEC7P is the tolerance and class of high-precision instrument ball bearings.
- 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 |
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| 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 |