• NSK R Series Inch Miniature Ball Bearings (Open, ZZ, ZZS)
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NSK R Series Inch Miniature Ball Bearings (Open, ZZ, ZZS)

NSK R Series Inch Miniature Ball Bearings (Open, ZZ, ZZS)

NSK R series inch miniature ball bearings, bore 1.016-9.525 mm, in open and shielded (ZZ, ZZS) versions as listed per size.

Key features

  • Inch boundary dimensions for equipment designed to inch standards
  • Single-row deep groove design for instruments and small motors
  • Shielded rows use the shielded-type width where printed
  • Dimensions shown in millimetres as printed

Specifications

Bearing type Inch miniature ball bearing
Bore range 1.016-9.525 mm
Dimension system Inch (values in mm)
Load ratings Basic dynamic Cr / static C0r
Speed basis Grease lubrication limit
Source NSK Rolling Bearings Catalogue (Korean ed.), p. B42-B43
R09 d: 1.016 mm | D: 3.175 mm | B: 1.191 mm | Cr: 0.096 kN | C0r: 0.025 kN | Grease speed: 130000 rpm
R0 d: 1.191 mm | D: 3.967 mm | B: 1.588 mm | Cr: 0.138 kN | C0r: 0.035 kN | Grease speed: 110000 rpm
R0ZZS d: 1.191 mm | D: 3.967 mm | B: 2.38 mm | Cr: 0.138 kN | C0r: 0.035 kN | Grease speed: 110000 rpm
R1 d: 1.397 mm | D: 4.762 mm | B: 1.984 mm | Cr: 0.231 kN | C0r: 0.066 kN | Grease speed: 90000 rpm
R1ZZS d: 1.397 mm | D: 4.762 mm | B: 2.779 mm | Cr: 0.231 kN | C0r: 0.066 kN | Grease speed: 90000 rpm
R1-4 d: 1.984 mm | D: 6.35 mm | B: 2.38 mm | Cr: 0.31 kN | C0r: 0.108 kN | Grease speed: 67000 rpm
R1-4ZZS d: 1.984 mm | D: 6.35 mm | B: 3.571 mm | Cr: 0.31 kN | C0r: 0.108 kN | Grease speed: 67000 rpm
R133 d: 2.38 mm | D: 4.762 mm | B: 1.588 mm | Cr: 0.188 kN | C0r: 0.06 kN | Grease speed: 80000 rpm
R133ZZS d: 2.38 mm | D: 4.762 mm | B: 2.38 mm | Cr: 0.188 kN | C0r: 0.06 kN | Grease speed: 80000 rpm
R1-5 d: 2.38 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.55 kN | C0r: 0.175 kN | Grease speed: 60000 rpm
R1-5ZZS d: 2.38 mm | D: 7.938 mm | B: 3.571 mm | Cr: 0.55 kN | C0r: 0.175 kN | Grease speed: 60000 rpm
R144 d: 3.175 mm | D: 6.35 mm | B: 2.38 mm | Cr: 0.283 kN | C0r: 0.095 kN | Grease speed: 67000 rpm
R144ZZ d: 3.175 mm | D: 6.35 mm | B: 2.779 mm | Cr: 0.283 kN | C0r: 0.095 kN | Grease speed: 67000 rpm
R2-5 d: 3.175 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.56 kN | C0r: 0.179 kN | Grease speed: 60000 rpm
R2-5ZZ d: 3.175 mm | D: 7.938 mm | B: 3.571 mm | Cr: 0.56 kN | C0r: 0.179 kN | Grease speed: 60000 rpm
R2-6 d: 3.175 mm | D: 9.525 mm | B: 2.779 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R2-6ZZS d: 3.175 mm | D: 9.525 mm | B: 3.571 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R2 d: 3.175 mm | D: 9.525 mm | B: 3.967 mm | Cr: 0.63 kN | C0r: 0.218 kN | Grease speed: 56000 rpm
R2ZZ d: 3.175 mm | D: 9.525 mm | B: 3.967 mm | Cr: 0.63 kN | C0r: 0.218 kN | Grease speed: 56000 rpm
R2A d: 3.175 mm | D: 12.7 mm | B: 4.366 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R2AZZ d: 3.175 mm | D: 12.7 mm | B: 4.366 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R155 d: 3.967 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R155ZZS d: 3.967 mm | D: 7.938 mm | B: 3.175 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R156 d: 4.762 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R156ZZS d: 4.762 mm | D: 7.938 mm | B: 3.175 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R166 d: 4.762 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.71 kN | C0r: 0.27 kN | Grease speed: 50000 rpm
R166ZZ d: 4.762 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.71 kN | C0r: 0.27 kN | Grease speed: 50000 rpm
R3 d: 4.762 mm | D: 12.7 mm | B: 3.967 mm | Cr: 1.3 kN | C0r: 0.485 kN | Grease speed: 43000 rpm
R3ZZ d: 4.762 mm | D: 12.7 mm | B: 4.978 mm | Cr: 1.3 kN | C0r: 0.485 kN | Grease speed: 43000 rpm
R168 d: 6.35 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.375 kN | C0r: 0.173 kN | Grease speed: 48000 rpm
R168ZZ d: 6.35 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.375 kN | C0r: 0.173 kN | Grease speed: 48000 rpm
R188 d: 6.35 mm | D: 12.7 mm | B: 3.175 mm | Cr: 1.08 kN | C0r: 0.44 kN | Grease speed: 40000 rpm
R188ZZ d: 6.35 mm | D: 12.7 mm | B: 4.762 mm | Cr: 1.08 kN | C0r: 0.44 kN | Grease speed: 40000 rpm
R4B d: 6.35 mm | D: 15.875 mm | B: 4.978 mm | Cr: 1.61 kN | C0r: 0.66 kN | Grease speed: 38000 rpm
R4BZZ d: 6.35 mm | D: 15.875 mm | B: 4.978 mm | Cr: 1.61 kN | C0r: 0.66 kN | Grease speed: 38000 rpm
R4A d: 6.35 mm | D: 19.05 mm | B: 5.558 mm | Cr: 2.34 kN | C0r: 0.885 kN | Grease speed: 36000 rpm
R4AZZ d: 6.35 mm | D: 19.05 mm | B: 7.142 mm | Cr: 2.34 kN | C0r: 0.885 kN | Grease speed: 36000 rpm
R1810 d: 7.938 mm | D: 12.7 mm | B: 3.967 mm | Cr: 0.54 kN | C0r: 0.276 kN | Grease speed: 40000 rpm
R1810ZZ d: 7.938 mm | D: 12.7 mm | B: 3.967 mm | Cr: 0.54 kN | C0r: 0.276 kN | Grease speed: 40000 rpm
R6 d: 9.525 mm | D: 22.225 mm | B: 5.558 mm | Cr: 3.35 kN | C0r: 1.41 kN | Grease speed: 32000 rpm
R6ZZ d: 9.525 mm | D: 22.225 mm | B: 7.142 mm | Cr: 3.35 kN | C0r: 1.41 kN | Grease speed: 32000 rpm
Miniature BearingsNSK
41 product codes available in this family
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NSK R Series Inch Miniature Ball Bearings (Open, ZZ, ZZS)

Brand NSK·Miniature Bearings

Available part numbers (41)

R09, R0, R0ZZS, R1, R1ZZS, R1-4, R1-4ZZS, R133, R133ZZS, R1-5 + 31 more — see full table ↓

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Product codes & specifications
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Product codeSpec
R09d: 1.016 mm | D: 3.175 mm | B: 1.191 mm | Cr: 0.096 kN | C0r: 0.025 kN | Grease speed: 130000 rpm
R0d: 1.191 mm | D: 3.967 mm | B: 1.588 mm | Cr: 0.138 kN | C0r: 0.035 kN | Grease speed: 110000 rpm
R0ZZSd: 1.191 mm | D: 3.967 mm | B: 2.38 mm | Cr: 0.138 kN | C0r: 0.035 kN | Grease speed: 110000 rpm
R1d: 1.397 mm | D: 4.762 mm | B: 1.984 mm | Cr: 0.231 kN | C0r: 0.066 kN | Grease speed: 90000 rpm
R1ZZSd: 1.397 mm | D: 4.762 mm | B: 2.779 mm | Cr: 0.231 kN | C0r: 0.066 kN | Grease speed: 90000 rpm
R1-4d: 1.984 mm | D: 6.35 mm | B: 2.38 mm | Cr: 0.31 kN | C0r: 0.108 kN | Grease speed: 67000 rpm
R1-4ZZSd: 1.984 mm | D: 6.35 mm | B: 3.571 mm | Cr: 0.31 kN | C0r: 0.108 kN | Grease speed: 67000 rpm
R133d: 2.38 mm | D: 4.762 mm | B: 1.588 mm | Cr: 0.188 kN | C0r: 0.06 kN | Grease speed: 80000 rpm
R133ZZSd: 2.38 mm | D: 4.762 mm | B: 2.38 mm | Cr: 0.188 kN | C0r: 0.06 kN | Grease speed: 80000 rpm
R1-5d: 2.38 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.55 kN | C0r: 0.175 kN | Grease speed: 60000 rpm
R1-5ZZSd: 2.38 mm | D: 7.938 mm | B: 3.571 mm | Cr: 0.55 kN | C0r: 0.175 kN | Grease speed: 60000 rpm
R144d: 3.175 mm | D: 6.35 mm | B: 2.38 mm | Cr: 0.283 kN | C0r: 0.095 kN | Grease speed: 67000 rpm
R144ZZd: 3.175 mm | D: 6.35 mm | B: 2.779 mm | Cr: 0.283 kN | C0r: 0.095 kN | Grease speed: 67000 rpm
R2-5d: 3.175 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.56 kN | C0r: 0.179 kN | Grease speed: 60000 rpm
R2-5ZZd: 3.175 mm | D: 7.938 mm | B: 3.571 mm | Cr: 0.56 kN | C0r: 0.179 kN | Grease speed: 60000 rpm
R2-6d: 3.175 mm | D: 9.525 mm | B: 2.779 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R2-6ZZSd: 3.175 mm | D: 9.525 mm | B: 3.571 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R2d: 3.175 mm | D: 9.525 mm | B: 3.967 mm | Cr: 0.63 kN | C0r: 0.218 kN | Grease speed: 56000 rpm
R2ZZd: 3.175 mm | D: 9.525 mm | B: 3.967 mm | Cr: 0.63 kN | C0r: 0.218 kN | Grease speed: 56000 rpm
R2Ad: 3.175 mm | D: 12.7 mm | B: 4.366 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R2AZZd: 3.175 mm | D: 12.7 mm | B: 4.366 mm | Cr: 0.64 kN | C0r: 0.225 kN | Grease speed: 53000 rpm
R155d: 3.967 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R155ZZSd: 3.967 mm | D: 7.938 mm | B: 3.175 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R156d: 4.762 mm | D: 7.938 mm | B: 2.779 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R156ZZSd: 4.762 mm | D: 7.938 mm | B: 3.175 mm | Cr: 0.36 kN | C0r: 0.149 kN | Grease speed: 53000 rpm
R166d: 4.762 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.71 kN | C0r: 0.27 kN | Grease speed: 50000 rpm
R166ZZd: 4.762 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.71 kN | C0r: 0.27 kN | Grease speed: 50000 rpm
R3d: 4.762 mm | D: 12.7 mm | B: 3.967 mm | Cr: 1.3 kN | C0r: 0.485 kN | Grease speed: 43000 rpm
R3ZZd: 4.762 mm | D: 12.7 mm | B: 4.978 mm | Cr: 1.3 kN | C0r: 0.485 kN | Grease speed: 43000 rpm
R168d: 6.35 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.375 kN | C0r: 0.173 kN | Grease speed: 48000 rpm
R168ZZd: 6.35 mm | D: 9.525 mm | B: 3.175 mm | Cr: 0.375 kN | C0r: 0.173 kN | Grease speed: 48000 rpm
R188d: 6.35 mm | D: 12.7 mm | B: 3.175 mm | Cr: 1.08 kN | C0r: 0.44 kN | Grease speed: 40000 rpm
R188ZZd: 6.35 mm | D: 12.7 mm | B: 4.762 mm | Cr: 1.08 kN | C0r: 0.44 kN | Grease speed: 40000 rpm
R4Bd: 6.35 mm | D: 15.875 mm | B: 4.978 mm | Cr: 1.61 kN | C0r: 0.66 kN | Grease speed: 38000 rpm
R4BZZd: 6.35 mm | D: 15.875 mm | B: 4.978 mm | Cr: 1.61 kN | C0r: 0.66 kN | Grease speed: 38000 rpm
R4Ad: 6.35 mm | D: 19.05 mm | B: 5.558 mm | Cr: 2.34 kN | C0r: 0.885 kN | Grease speed: 36000 rpm
R4AZZd: 6.35 mm | D: 19.05 mm | B: 7.142 mm | Cr: 2.34 kN | C0r: 0.885 kN | Grease speed: 36000 rpm
R1810d: 7.938 mm | D: 12.7 mm | B: 3.967 mm | Cr: 0.54 kN | C0r: 0.276 kN | Grease speed: 40000 rpm
R1810ZZd: 7.938 mm | D: 12.7 mm | B: 3.967 mm | Cr: 0.54 kN | C0r: 0.276 kN | Grease speed: 40000 rpm
R6d: 9.525 mm | D: 22.225 mm | B: 5.558 mm | Cr: 3.35 kN | C0r: 1.41 kN | Grease speed: 32000 rpm
R6ZZd: 9.525 mm | D: 22.225 mm | B: 7.142 mm | Cr: 3.35 kN | C0r: 1.41 kN | Grease speed: 32000 rpm

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