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440 - Precision - Technical
- from Bearing Shop Online

Precision - 440C Stainless and 52100 Chrome Steel

These tables cover ABEC and ISO tolerances for ball bearings.

Abec 1 or ISO P6 gradings apply to all precision bearings in our catalogue made from SAE52100 or 440C Stainless Steel unless otherwise specified.

The section of our bearing part number that specifies the grade is found near the end, preceded by the country of manufacture code. The following list shows most of our country/precision designations.

  • No designation: Abec 1
  • grP6: German made ISO P6 precision
  • jP6: Japanese made ISO P6 precision
  • uP6: US made ISO P6 precision
  • gr3: German made Abec 3 precision
  • j3: Japanese made Abec 3 precision
  • u3: US made ISO Abec 3 precision
  • grP5: German made ISO P5 precision
  • jP5: Japanese made ISO P5 precision
  • s5: Swiss made ISO P5 precision
  • uP5: US made ISO P5 precision
  • gr5: German made Abec 5 precision
  • j5: Japanese made Abec 5 precision
  • s5: Swiss made Abec 5 precision
  • u5: US made Abec 5 precision
  • gr7: German made Abec 7 Precision
  • s7: Swiss made Abec 7 Precision
  • u7: US made ISO Abec 7 Precision

No country of manufacture is specified in the part number of Abec 1 bearings since they are the most common bearings and supplies may be obtained from a number of different countries as required by demand and/or pricing. The majority of our Abec 1 bearings are Japanese manufactured. A manufacture code is printed on the label which can be used to determine the country of manufacture of a particular batch.

Each table covers either inner or outer ring tolerances for a defined size range as specified in the headers. Scroll down to see all tables...


Tolerances for Inner Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Inner Rings with a Bore >= 0.6 mm and <= 2.5 mm

Precision Grade Mean Bore Deviation Deltadmp Bore Deviation Limit
Vdp
Width Deviation
DeltaBs
Max Side Deviation from Parallel
DeltaVBs
Track Parallel with Side
Sia
Bore Square with Side
Sd
Eccentricity of Tracks
Kia
ISO P0
0 to -8 10 0 to -40 12 - - 10
Abec 1
0 to -7.5 10 - - - - 7.5
ISO P6
0 to -7 8 0 to -40 12 - - 5
Abec 3
0 to -5 7.5 0 to -125 - - - 5
ISO P5
0 to -5 5 0 to -40 5 7.5 7.5 4
ISO P5A
0 to -5 3 0 to -25 5 7.5 7.5 3.5
Abec 5
0 to -5 5 0 to -40 5 7.5 7.5 3.5
Abec 5P
0 to -5 2.5 0 to -25 5 7.5 7.5 3.5
ISO P4
0 to -4 4 0 to -40 2.5 3 3 2.5
ISO P4A
0 to -5 2.5 0 to -25 2.5 3 3 2.5
Abec 7
0 to -4 4 0 to -40 2.5 2.5 2.5 2.5
Abec 7P
0 to -5 2.5 0 to -25 2.5 2.5 2.5 2.5
ISO P2
0 to -2.5 2.5 0 to -25 1.5 1.5 1.5 1.5
Abec 9
0 to -2.5 2.5 0 to -40 1.25 1.25 1.25 1.25
Abec 9P
0 to -2.5 1.25 0 to -25 1.25 1.25 1.25 1.25

Tolerances for Inner Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Inner Rings with a Bore > 2.5 mm and <= 10 mm

Precision Grade Mean Bore Deviation Deltadmp Bore Deviation Limit
Vdp
Width Deviation
DeltaBs
Max Side Deviation from Parallel
DeltaVBs
Track Parallel with Side
Sia
Bore Square with Side
Sd
Eccentricity of Tracks
Kia
ISO P0
0 to -8 10 0 to -120 15 - - 10
Abec 1
0 to -7.5 10 0 to -125 - - - 7.5
ISO P6
0 to -7 8 0 to -120 15 - - 6
Abec 3
0 to -5 7.5 0 to -125 - - - 5
ISO P5
0 to -5 5 0 to -40 5 7.5 7.5 4
ISO P5A
0 to -5 3 0 to -25 5 7.5 7.5 3.5
Abec 5
0 to -5 5 0 to -40 5 7.5 7.5 3.5
Abec 5P
0 to -5 2.5 0 to -25 5 7.5 7.5 3.5
ISO P4
0 to -4 4 0 to -40 2.5 3 3 2.5
ISO P4A
0 to -5 2.5 0 to -25 2.5 3 3 2.5
Abec 7
0 to -4 4 0 to -40 2.5 2.5 2.5 2.5
Abec 7P
0 to -5 2.5 0 to -25 2.5 2.5 2.5 2.5
ISO P2
0 to -2.5 2.5 0 to -40 1.5 1.5 1.5 1.5
Abec 9
0 to -2.5 2.5 0 to -40 1.25 1.25 1.25 1.25
Abec 9P
0 to -2.5 1.25 0 to -25 1.25 1.25 1.25 1.25

Tolerances for Inner Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Inner Rings with a Bore > 10 mm and <= 18 mm

Precision Grade Mean Bore Deviation Deltadmp Bore Deviation Limit
Vdp
Width Deviation
DeltaBs
Max Side Deviation from Parallel
DeltaVBs
Track Parallel with Side
Sia
Bore Square with Side
Sd
Eccentricity of Tracks
Kia
ISO P0
0 to -8 10 0 to -120 20 - - 10
Abec 1
0 to -7.5 10 0 to -125 - - - 11
ISO P6
0 to -7 8 0 to -120 20 - - 7
Abec 3
0 to -5 7.5 0 to -125 - - - 5
ISO P5
0 to -5 5 0 to -80 5 7.5 7.5 4
ISO P5A
0 to -5 3 0 to -25 5 7.5 7.5 3.5
Abec 5
0 to -5 5 0 to -80 5 7.5 7.5 3.5
Abec 5P
0 to -5 2.5 0 to -25 5 7.5 7.5 3.5
ISO P4
0 to -4 4 0 to -80 2.5 3 3 2.5
ISO P4A
0 to -5 2.5 0 to -25 2.5 3 3 2.5
Abec 7
0 to -4 4 0 to -80 2.5 2.5 2.5 2.5
Abec 7P
0 to -5 2.5 0 to -25 2.5 2.5 2.5 2.5
ISO P2
0 to -2.5 2.5 0 to -80 1.5 1.5 1.5 1.5
Abec 9
0 to -2.5 2.5 0 to -80 1.25 1.25 1.25 1.25
Abec 9P
0 to -2.5 1.25 0 to -25 1.25 1.25 1.25 1.25

Tolerances for Inner Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Inner Rings with a Bore > 18 mm and <= 30 mm

Precision Grade Mean Bore Deviation Deltadmp Bore Deviation Limit
Vdp
Width Deviation
DeltaBs
Max Side Deviation from Parallel
DeltaVBs
Track Parallel with Side
Sia
Bore Square with Side
Sd
Eccentricity of Tracks
Kia
ISO P0
0 to -10 13 0 to -120 20 - - 13
Abec 1
0 to -11 13 0 to -120 20 - - 13
ISO P6
0 to -8 10 0 to -120 20 - - 8
Abec 3
0 to -8 10 0 to -120 20 - - 8
ISO P5
0 to -6 6 0 to -120 5 8 8 4
Abec 5
0 to -6 6 0 to -120 5 8 8 4
Abec 5P
0 to -5 2.5 0 to -25 5 8 8 4
ISO P4
0 to -5 5 0 to -120 2.5 4 4 2.5
Abec 7
0 to -5 5 0 to -120 2.5 4 4 2.5
Abec 7P
0 to -5 5 0 to -25 2.5 4 4 2.5
ISO P2
0 to -2.5 2.5 0 to -120 1.5 2.5 1.5 2.5
Abec 9
0 to -2.5 2.5 0 to -120 1.25 2.5 1.25 2.5
Abec 9P
0 to -2.5 1.25 0 to -25 1.25 1.25 1.25 2.5

Tolerances for Inner Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Inner Rings with a Bore > 30 mm and <= 50 mm

Precision Grade Mean Bore Deviation Deltadmp Bore Deviation Limit
Vdp
Width Deviation
DeltaBs
Max Side Deviation from Parallel
DeltaVBs
Track Parallel with Side
Sia
Bore Square with Side
Sd
Eccentricity of Tracks
Kia
ISO P0
0 to -12 15 0 to -120 20 - - 15
Abec 1
0 to -12 15 0 to -120 20 - - 15
ISO P6
0 to -10 13 0 to -120 20 - - 10
Abec 3
0 to -10 13 0 to -120 20 - - 10
ISO P5
0 to -8 8 0 to -120 8 8 8 5
Abec 5
0 to -8 8 0 to -120 8 8 8 5
ISO P4
0 to -6 6 0 to -120 6 4 4 4
Abec 7
0 to -6 6 0 to -120 6 4 4 4
ISO P2
0 to -2.5 2.5 0 to -120 1.5 2.5 1.5 2.5
Abec 9
0 to -2.5 2.5 0 to -120 1.5 2.5 1.5 2.5

Tolerances for Inner Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Inner Rings with a Bore > 50 mm and <= 80 mm

Precision Grade Mean Bore Deviation Deltadmp Bore Deviation Limit
Vdp
Width Deviation
DeltaBs
Max Side Deviation from Parallel
DeltaVBs
Track Parallel with Side
Sia
Bore Square with Side
Sd
Eccentricity of Tracks
Kia
ISO P0
0 to -12 19 0 to -150 25 - - 20
Abec 1
0 to -12 19 0 to -150 25 - - 20
ISO P6
0 to -12 15 0 to -150 25 - - 10
Abec 3
0 to -12 15 0 to -150 25 - - 10
ISO P5
0 to -9 9 0 to -150 6 8 8 5
Abec 5
0 to -9 9 0 to -150 6 8 8 5
ISO P4
0 to -7.5 7.5 0 to -150 4 5 5 4
Abec 7
0 to -7.5 7.5 0 to -150 4 5 5 4
ISO P2
0 to -4 4 0 to -150 1.5 2.5 1.5 2.5
Abec 9
0 to -4 4 0 to -150 1.5 2.5 1.5 2.5

Tolerances for Outer Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Outer Rings with an OD > 2.5 mm and <= 18 mm

Precision Grade Mean Outer Deviation Deltadmp Absolute Limit of Outside Diameter Deviation
Vdp
Width Deviation
DeltaCs
Max Side Deviation from Parallel
DeltaVCs
Track Parallel with Side
Sea
OD Square with Side
Sd
Eccentricity of Tracks
Kea
ISO P0
0 to -8 10 Based on Bore Size Tables Based on Bore Size Tables - - 15
Abec 1
0 to -7.5 10 - - 15
ISO P6
0 to -7 9 - - 8
Abec 3
0 to -7.5 9 - - 7.5
ISO P5
0 to -5 5 8 8 5
ISO P5A
0 to -5 3 8 8 5
Abec 5
0 to -5 5 7.5 7.5 5
Abec 5P
0 to -5 5 7.5 7.5 5
ISO P4
0 to -4 4 5 4 3
ISO P4A
0 to -4 2.5 5 4 3.5
Abec 7
0 to -5 4 5 4 4
Abec 7P
0 to -5 5 4 4 4
ISO P2
0 to -2.5 2.5 1.5 1.5 1.5
Abec 9
0 to -2.5 2.5 1.25 1.25 1.25
Abec 9P
0 to -2.5 0.5 1.25 1.25 1.25

Tolerances for Outer Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Outer Rings with an OD > 18 mm and <= 30 mm

Precision Grade Mean Outer Deviation Deltadmp Absolute Limit of Outside Diameter Deviation
Vdp
Width Deviation
DeltaCs
Max Side Deviation from Parallel
DeltaVCs
Track Parallel with Side
Sea
OD Square with Side
Sd
Eccentricity of Tracks
Kea
ISO P0
0 to -9 12 Based on Bore Size Tables Based on Bore Size Tables - - 15
Abec 1
0 to -10 11 - - 15
ISO P6
0 to -8 10 - - 9
Abec 3
0 to -7.5 10 - - 9
ISO P5
0 to -6 6 8 8 6
ISO P5A
0 to -6 3 8 8 6
Abec 5
0 to -5 6 7.5 7.5 5
Abec 5P
0 to -5 5 7.5 7.5 5
ISO P4
0 to -5 5 5 4 4
ISO P4A
0 to -5 2.5 5 4 4
Abec 7
0 to -5 5 5 4 4
Abec 7P
0 to -5 5 5 4 4
ISO P2
0 to -4 4 2.5 1.5 2.5
Abec 9
0 to -4 4 2.5 1.25 2.5
Abec 9P
0 to -4 0.8 2.5 1.25 2.5

Tolerances for Outer Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Outer Rings with an OD > 30 mm and <= 50 mm

Precision Grade Mean Outer Deviation Deltadmp Absolute Limit of Outside Diameter Deviation
Vdp
Width Deviation
DeltaCs
Max Side Deviation from Parallel
DeltaVCs
Track Parallel with Side
Sea
OD Square with Side
Sd
Eccentricity of Tracks
Kea
ISO P0
0 to -11 14 Based on Bore Size Tables Based on Bore Size Tables - - 20
Abec 1
0 to -11 14 - - 20
ISO P6
0 to -9 14 - - 10
Abec 3
0 to -9 14 - - 10
ISO P5
0 to -7 7 8 8 7
Abec 5
0 to -7.5 7.5 7.5 7.5 7.5
Abec 5P
0 to -5 5 7.5 7.5 5
ISO P4
0 to -6 6 5 4 5
Abec 7
0 to -6 6 5 4 5
Abec 7P
0 to -5 5 5 4 4
ISO P2
0 to -4 4 2.5 1.5 2.5
Abec 9
0 to -4 4 2.5 1.25 2.5
Abec 9P
0 to -4 - 2.5 1.25 2.5

Tolerances for Outer Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Outer Rings with an OD > 50 mm and <= 80 mm

Precision Grade Mean Outer Deviation Deltadmp Absolute Limit of Outside Diameter Deviation
Vdp
Width Deviation
DeltaCs
Max Side Deviation from Parallel
DeltaVCs
Track Parallel with Side
Sea
OD Square with Side
Sd
Eccentricity of Tracks
Kea
ISO P0
0 to -13 16 Based on Bore Size Tables Based on Bore Size Tables - - 25
Abec 1
0 to -13 17 - - 25
ISO P6
0 to -11 16 - - 13
Abec 3
0 to -11 16 - - 13
ISO P5
0 to -9 9 10 8 8
Abec 5
0 to -9 9 10 7.5 7.5
ISO P4
0 to -7 7 5 4 5
Abec 7
0 to -7.5 7.5 5 4 5
ISO P2
0 to -4 4 4 1.5 4
Abec 9
0 to -4 4 4 1.25 4

Tolerances for Outer Rings
Dimensions are in 0.001 mm (thousandths of a mm)

Outer Rings with an OD > 80 mm and <= 120 mm

Precision Grade Mean Outer Deviation Deltadmp Absolute Limit of Outside Diameter Deviation
Vdp
Width Deviation
DeltaCs
Max Side Deviation from Parallel
DeltaVCs
Track Parallel with Side
Sea
OD Square with Side
Sd
Eccentricity of Tracks
Kea
ISO P0
0 to -15 19 Based on Bore Size Tables Based on Bore Size Tables - - 35
Abec 1
0 to -16 19 - - 35
ISO P6
0 to -13 17 - - 18
Abec 3
0 to -13 17 - - 18
ISO P5
0 to -10 10 11 9 10
Abec 5
0 to -10 10 11 9 10
ISO P4
0 to -8 8 6 5 6
Abec 7
0 to -7.5 7.5 6 5 6
ISO P2
0 to -5 5 5 2.5 5
Abec 9
0 to -5 5 5 2.5 5

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