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440 - Precision - Technical

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

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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 ISO P5A Abec 5 Abec 5P ISO P4 ISO P4A Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean bore Deviation
Deltadmp
0 to -8 0 to -7.5 0 to -7 0 to -5 0 to -5 0 to -5 0 to -5 0 to -5 0 to -4 0 to -5 0 to -4 0 to -5 0 to -2.5 0 to -2.5 0 to -2.5
Absolute Limit of bore Deviation
Vdp
10 10 8 7.5 5 3 5 2.5 4 2.5 4 2.5 2.5 2.5 1.25
Width Deviation
DeltaBs
0 to -40 - 0 to -40 0 to -125 0 to -40 0 to -25 0 to -40 0 to -25 0 to -40 0 to -25 0 to -40 0 to -25 0 to -25 0 to -40 0 to -25
Maximum Deviation from Parallel Sides
VBs
12 - 12 - 5 5 5 5 2.5 2.5 2.5 2.5 1.5 1.25 1.25
Track Parallelism with Side
Sia
- - - - 7.5 7.5 7.5 7.5 3 3 2.5 2.5 1.5 1.25 1.25
Bore Square with Side
Sd
- - - - 7.5 7.5 7.5 7.5 3 3 2.5 2.5 1.5 1.25 1.25
Eccentricity of Tracks
Kia
10 7.5 5 5 4 3.5 3.5 3.5 2.5 2.5 2.5 2.5 1.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 ISO P5A Abec 5 Abec 5P ISO P4 ISO P4A Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean bore Deviation
Deltadmp
0 to -8 0 to -7.5 0 to -7 0 to -5 0 to -5 0 to -5 0 to -5 0 to -5 0 to -4 0 to -5 0 to -4 0 to -5 0 to -2.5 0 to -2.5 0 to -2.5
Absolute Limit of bore Deviation
Vdp
10 10 8 7.5 5 3 5 2.5 4 2.5 4 2.5 2.5 2.5 1.25
Width Deviation
DeltaBs
0 to -120 0 to -125 0 to -120 0 to -125 0 to -40 0 to -25 0 to -40 0 to -25 0 to -40 0 to -25 0 to -40 0 to -25 0 to -40 0 to -40 0 TO -25
Maximum Deviation from Parallel Sides
VBs
15 - 15 - 5 5 5 5 2.5 2.5 2.5 2.5 1.5 1.25 1.25
Track Parallelism with Side
Sia
- - - - 7.5 7.5 7.5 7.5 3 3 2.5 2.5 1.5 1.25 1.25
Bore Square with Side
Sd
- - - - 7.5 7.5 7.5 7.5 3 3 2.5 2.5 1.5 1.25 1.25
Eccentricity of Tracks
Kia
10 7.5 6 5 4 3.5 3.5 3.5 2.5 2.5 2.5 2.5 1.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 ISO P5A Abec 5 Abec 5P ISO P4 ISO P4A Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean bore Deviation
Deltadmp
0 to -8 0 to -7.5 0 to -7 0 to -5 0 to -5 0 to -5 0 to -5 0 to -5 0 to -4 0 to -5 0 to -4 0 to -5 0 to -2.5 0 to -2.5 0 to -2.5
Absolute Limit of bore Deviation
Vdp
10 10 8 7.5 5 3 5 2.5 4 2.5 4 2.5 2.5 2.5 1.25
Width Deviation
DeltaBs
0 to -120 0 TO -125 0 to -120 0 to -125 0 to -80 0 to -25 0 to -80 0 to -25 0 to -80 0 to -25 0 to -80 0 to -25 0 to -80 0 to -80 0 to -25
Maximum Deviation from Parallel Sides
VBs
20 - 20 - 5 5 5 5 2.5 2.5 2.5 2.5 1.5 1.25 1.25
Track Parallelism with Side
Sia
- - - - 7.5 7.5 7.5 7.5 3 3 2.5 2.5 1.5 1.25 1.25
Bore Square with Side
Sd
- - - - 7.5 7.5 7.5 7.5 3 3 2.5 2.5 1.5 1.25 1.25
Eccentricity of Tracks
Kia
10 11 7 5 4 3.5 3.5 3.5 2.5 2.5 2.5 2.5 1.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 Abec 5 Abec 5P ISO P4 Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean bore Deviation
Deltadmp
0 to -10 0 to -11 0 to -8 0 to -8 0 to -6 0 to -6 0 to -5 0 to -5 0 to -5 0 to -5 0 to -2.5 0 to -2.5 0 to -2.5
Absolute Limit of bore Deviation
Vdp
13 13 10 10 6 6 2.5 5 5 5 2.5 2.5 1.25
Width Deviation
DeltaBs
0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -25 0 to -120 0 to -120 0 to -25 0 to -120 0 to -120 0 to -25
Maximum Deviation from Parallel Sides
VBs
20 20 20 20 5 5 5 2.5 2.5 2.5 1.5 1.25 1.25
Track Parallelism with Side
Sia
- - - - 8 8 8 4 4 4 2.5 2.5 1.25
Bore Square with Side
Sd
- - - - 8 8 8 4 4 4 1.5 1.25 1.25
Eccentricity of Tracks
Kia
13 13 8 8 4 4 4 2.5 2.5 2.5 2.5 2.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 Abec 5 ISO P4 Abec 7 ISO P2 Abec 9
Mean bore Deviation
Deltadmp
0 to -12 0 to -12 0 to -10 0 to -10 0 to -8 0 to -8 0 to -6 0 to -6 0 to -2.5 0 to -2.5
Absolute Limit of bore Deviation
Vdp
15 15 13 13 8 8 6 6 2.5 2.5
Width Deviation
DeltaBs
0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -120 0 to -120
Maximum Deviation from Parallel Sides
VBs
20 20 20 20 8 8 6 6 1.5 1.5
Track Parallelism with Side
Sia
- - - - 8 8 4 4 2.5 2.5
Bore Square with Side
Sd
- - - - 8 8 4 4 1.5 1.5
Eccentricity of Tracks
Kia
15 15 10 10 5 5 4 4 2.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 Abec 5 ISO P4 Abec 7 ISO P2 Abec 9
Mean bore Deviation
Deltadmp
0 to -12 0 to -12 0 to -12 0 to -12 0 to -9 0 to -9 0 to -7.5 0 to -7.5 0 to -4 0 to -4
Absolute Limit of bore Deviation
Vdp
19 19 15 15 9 9 7.5 7.5 4 4
Width Deviation
DeltaBs
0 to -150 0 to -150 0 to -150 0 to -150 0 to -150 0 to -150 0 to -150 0 to -150 0 to -150 0 to -150
Maximum Deviation from Parallel Sides
VBs
25 25 25 25 6 6 4 4 1.5 1.5
Track Parallelism with Side
Sia
- - - - 8 8 5 5 2.5 2.5
Bore Square with Side
Sd
- - - - 8 8 5 5 1.5 1.5
Eccentricity of Tracks
Kia
20 20 10 10 5 5 4 4 2.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 ISO P5A Abec 5 Abec 5P ISO P4 ISO P4A Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean Outer Dia Deviation
Deltadmp
0 to -8 0 to -7.5 0 to -7 0 to -7.5 0 to -5 0 to -5 0 to -5 0 to -5 0 to -4 0 to -4 0 to -5 0 to -5 0 to -2.5 0 to -2.5 0 to -2.5
Absolute Limit of Outside Diameter Deviation
Vdp
10 10 9 9 5 3 5 5 4 2.5 4 5 2.5 2.5 0.5
Width Deviation
DeltaCs
Based on bore size
Maximum Deviation from Parallel Sides
VCs
Based on bore size
Track Parallelism with Side
Sea
- - - - 8 8 7.5 7.5 5 5 5 4 1.5 1.25 1.25
OD Square with Side
Sd
- - - - 8 8 7.5 7.5 4 4 4 4 1.5 1.25 1.25
Eccentricity of Tracks
Kea
15 15 8 7.5 5 5 5 5 3 3.5 4 4 1.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 ISO P5A Abec 5 Abec 5P ISO P4 ISO P4A Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean Outer Dia Deviation
Deltadmp
0 to -9 0 to -10 0 to -8 0 to -7.5 0 to -6 0 to -6 0 to -5 0 to -5 0 to -5 0 to -5 0 to -5 0 to -5 0 to -4 0 to -4 0 to -4
Absolute Limit of Outside Diameter Deviation
Vdp
12 11 10 10 6 3 6 5 5 2.5 5 5 4 4 0.8
Width Deviation
DeltaCs
Based on bore size
Maximum Deviation from Parallel Sides
VCs
Based on bore size
Track Parallelism with Side
Sea
- - - - 8 8 7.5 7.5 5 5 5 5 2.5 2.5 2.5
OD Square with Side
Sd
- - - - 8 8 7.5 7.5 4 4 4 4 1.5 1.25 1.25
Eccentricity of Tracks
Kea
15 15 9 9 6 6 5 5 4 4 4 4 2.5 2.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 Abec 5 Abec 5P ISO P4 Abec 7 Abec 7P ISO P2 Abec 9 Abec 9P
Mean Outer Dia Deviation
Deltadmp
0 to -11 0 to -11 0 to -9 0 to -9 0 to -7 0 to -7.5 0 to -5 0 to -6 0 to -6 0 to -5 0 to -4 0 to -4 0 to -4
Absolute Limit of Outside Diameter Deviation
Vdp
14 14 14 14 7 7.5 5 6 6 5 4 4 -
Width Deviation
DeltaCs
Based on bore size
Maximum Deviation from Parallel Sides
VCs
Based on bore size
Track Parallelism with Side
Sea
- - - - 8 7.5 7.5 5 5 5 2.5 2.5 2.5
OD Square with Side
Sd
- - - - 8 7.5 7.5 4 4 4 1.5 1.25 1.25
Eccentricity of Tracks
Kea
20 20 10 10 7 7.5 5 5 5 4 2.5 2.5 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 Abec 5 ISO P4 Abec 7 ISO P2 Abec 9
Mean Outer Dia Deviation
Deltadmp
0 to -13 0 to -13 0 to -11 0 to -11 0 to -9 0 to -9 0 to -7 0 to -7.5 0 to -4 0 to -4
Absolute Limit of Outside Diameter Deviation
Vdp
16 17 16 16 9 9 7 7.5 4 4
Width Deviation
DeltaCs
Based on bore size
Maximum Deviation from Parallel Sides
VCs
Based on bore size
Track Parallelism with Side
Sea
- - - - 10 10 5 5 4 4
OD Square with Side
Sd
- - - - 8 7.5 4 4 1.5 1.25
Eccentricity of Tracks
Kea
25 25 13 13 8 7.5 5 5 4 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 ISO P0 Abec 1 ISO P6 Abec 3 ISO P5 Abec 5 ISO P4 Abec 7 ISO P2 Abec 9
Mean Outer Dia Deviation
Deltadmp
0 to -15 0 to -16 0 to -13 0 to -13 0 to -10 0 to -10 0 to -8 0 to -7.5 0 to -5 0 to -5
Absolute Limit of Outside Diameter Deviation
Vdp
19 19 17 17 10 10 8 7.5 5 5
Width Deviation
DeltaCs
Based on bore size
Maximum Deviation from Parallel Sides
VCs
Based on bore size
Track Parallelism with Side
Sea
- - - - 11 11 6 6 5 5
OD Square with Side
Sd
- - - - 9 9 5 5 2.5 2.5
Eccentricity of Tracks
Kea
35 35 18 18 10 10 6 6 5 5

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All care has been taken in the compilation of this page, however errors may occur. Please do not use the information contained herein for critical applications without first re-checking the information with an independent source. No responsibility will be accepted by Miniature Bearings Australia Pty Ltd or the Directors of said company for any loss of any kind that may be incurred in any way whatsoever from use of the information provided in these pages.

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Tables and information on this web site should be read as a general guide only.
All relevant standards should be consulted to ensure the accuracy of information presented.


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