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HobbyParts 440 - Precision - Technical Information
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 dmp |
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 DeviationBs |
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 Deviationdmp |
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 DeviationBs |
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 Deviationdmp |
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 DeviationBs |
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 Deviationdmp |
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 DeviationBs |
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 Deviationdmp |
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 DeviationBs |
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 Deviationdmp |
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 DeviationBs |
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 Deviationdmp |
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 DeviationCs |
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 Deviationdmp |
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 DeviationCs |
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 Deviationdmp |
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 DeviationCs |
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 Deviationdmp |
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 DeviationCs |
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 Deviationdmp |
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 DeviationCs |
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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Tables and information on this web site should be read as a general guide only. The relevant standards should be consulted to ensure the accuracy of information presented.
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H.E. Supplies (Hobby Engineering Supplies) offers thousands of products including remote controlled cars, planes, boats, and helicopters. We stock spare parts for remote controlled models. Our range includes the popular Solarbotics solar model kits and spares. We also distribute the full range of miniature engineering products from Miniature Bearings Australia. This range includes small bearings, timing pulleys, timing belts, seals, o-rings, gears and more. Also available from our store in Mansfield Queensland are a full range of lubricants, adhesives, kites, balsa wood and plastic rod and sheet materials. See our Online Catalogue for more information. Our main business is handled from our sales counter and showroom at 186 Wecker Road Mansfield, Queensland, Australia, but we also sell by phone, fax, online and mail order. We offer all of our hobby parts through our online store and some of the more popular MBA items. If you would like to purchase other MBA items online, Small Parts and Bearings offer the full range in their online catalogue.Using the links at the top of this page you will find extensive information including catalogues (Products and Store link), technical data, and other product specific information.
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