Needle Roller Bearings specifications
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Bore |
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The bearing industry uses a standard numbering system for bearings with metric-diameter bores. If the bore is hexagonal, enter the dimension across the flats. If the bore is tapered, enter the smaller diameter. For bore sizes 04 and up, multiply the bore size by 5 to identify the bore diameter in millimeters (mm). Refer to the table below. |
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Search Logic: |
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. |
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Outside Diameter |
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Enter the outside diameter of the bearing. For housed bearings, include the housing. For flanged bearings, exclude the flange. |
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Search Logic: |
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. |
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Tables: |
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Bore Size (does not list all possible sizes) |
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Bore Size
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Dimension (mm)
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00
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10mm
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01
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12mm
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02
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15mm
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03
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17mm
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04
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20mm
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05
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25mm
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06
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30mm
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07
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35mm
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08
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40mm
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09
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45mm
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10
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50mm
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11
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55mm
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12
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60mm
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13
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65mm
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14
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70mm
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15
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75mm
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16
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80mm
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17
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85mm
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18
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90mm
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19
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95mm
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20
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100mm
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Bearing Design
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Bearing Design: |
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Your choices are... |
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Needle Roller Without Inner
 Courtesy of CCTY Bearing
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Needle roller bearings are cylindrical roller bearings where the rolling element is long and thin relative to its diameter. These bearings have low cross sections but high radial load carrying capacity. This type has an outer ring, needle rollers, and a cage, but no inner ring. |
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Needle Roller With Inner
 Courtesy of GlobalSpec, Inc.
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Needle roller bearings are cylindrical roller bearings where the rolling element is long and thin relative to its diameter. These bearings have low cross sections but high radial load carrying capacity. This type has an outer ring, needle rollers, a cage and an inner ring. |
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Needle Roller and Cage Assembly |
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These bearings consist of needle rollers and a cage. They have no integral inner or outer rings. They can be used with a hardened shaft and housing, or separate, hardened inner and outer rings. |
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Drawn Cup Caged Needle |
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Drawn cup needle bearings consist of needle rollers in a housing drawn from a single sheet of steel. |
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Full Complement Drawn Cup Needle |
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Full-complement drawn cup needle bearings consist of a full complement (no cage) of needle rollers in a housing drawn from a single sheet of steel. |
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Needle Roller Thrust
 Courtesy of CCTY Bearing
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Needle roller thrust bearings consist of a needle roller and cage assembly. They can be assembled against hardened flat surfaces or with hardened thrust washers. |
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Combined Needle Roller |
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These bearings combine needle roller radial bearings with a ball or roller thrust bearing. These bearings can be used for combined radial and axial loading applications. |
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Other |
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Unlisted, unspecified, or proprietary configuration. |
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Search Logic: |
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. |
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Additional Specifications
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Rated Speed (Oil) |
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The rated speed for a bearing with grease lubrication is lower than that of a bearing with oil lubrication. |
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Search Logic: |
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. |
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Seals: |
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Seals provide protection from contamination and as a retainer for lubricant. |
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Your choices are... |
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None (Open Bearing) |
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Bearing is open; it has no seals or shields. Open bearings offer no protection from contamination or lubricant containment, but have higher maximum speed capabilities than bearings with seals or shields. |
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Single Seal |
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Bearing has one seal to prevent the ingress of dirt. |
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Double Seal |
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Bearing has two seals to prevent the ingress of dirt. |
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Search Logic: |
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. |
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Self-aligning |
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Bearing outer ring is spherically shaped and matched to the bore of a housing to compensate for some misalignment. |
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Search Logic: |
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"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. |
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Tables: |
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Equivalent Standard of Ball Bearing Tolerances
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AFBMA (ABEC, RBEC)
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1
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3
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5
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7
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9
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ISO
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0
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6
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5
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4
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2
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JIS
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0
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6
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5
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4
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2
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DIN
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P 0
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P 6
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P 5
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P 4
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P 2
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AFBMA- Anti-Friction Bearing Manufacturers Association (ABEC-Ball Bearings, RBEC-Roller Bearings) ISO- International Organization for Standardization JIS- Japanese Industrial Standards DIN- Deutsch Industrie Norm
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Standard ABEC Tolerances Inner Rings (all tolerances in micrometers)
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Bearing Bore (mm)
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Bore Diameter* +.00mm to
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Width Variation
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Radial Runout
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Side Runout with Bore
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Raceway Runout with Side
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Width Inner & Outer Rings
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ABEC Rating
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1
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3
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5
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7
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9
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3
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5
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7
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9
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1
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3
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5
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7
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9
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3
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5
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7
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9
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3
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5
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7
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9
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1-3-5-7
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9
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0 - 10
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-3
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-2
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-2
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-1.5
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-1
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3
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2
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1
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.5
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3
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2
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1.5
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1
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.5
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3
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3
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1
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.5
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6
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3
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1
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.5
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-50
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-10
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10 - 18
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-3
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-2
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-2
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-1.5
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-1
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4
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2
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1
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.5
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4
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3
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1.5
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1
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.5
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4
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3
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1
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.5
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6
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3
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1
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.5
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-50
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-20
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Standard ABEC Tolerances Outer Rings (all tolerances in micrometers)
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Bearing O.D. (mm)
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Outside Diameter* +.00mm to
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Width Variation
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Radial Runout
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Raceway Runout with Side
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Outside Diameter Runout with Side
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ABEC Rating
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1
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3
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5
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7
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9
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3
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5
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7
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9
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1
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3
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5
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7
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9
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3
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5
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7
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9
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3
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5
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7
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9
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0 - 18
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-4
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-3
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-2
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-2
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-1
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4
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2
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1
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.5
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6
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4
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2
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1.5
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.5
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8
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3
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2
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.5
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4
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3
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1.5
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.5
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18 - 30
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-4
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-3
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-2
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-2
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-1.5
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4
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2
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1
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.5
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6
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4
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2
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1.5
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1
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8
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3
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2
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1
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4
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3
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1.5
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.5
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