R Series (Inch) Deep Groove Ball Bearings
Material: Chrome Steel (Gcr15) / Stainless Steel (440C)
Structure: Single Row / Deep Groove / Inch (Imperial)
Precision: ABEC-1, ABEC-3, ABEC-5, ABEC-7
Sealing: Open / ZZ / 2RS
Cage: Pressed Steel / Polyamide
Clearance: C2, C0, C3
Bore Range: 0.125" – 1.500"
Application: US market small motors, hobby equipment, hobby grade RC cars, model engineering, inch-standard mechanisms
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The R Series inch-size deep groove ball bearings conform to imperial bore dimensions for North American and legacy equipment applications. Available in open, shielded, and sealed configurations with ABEC precision grades (1 through 7). The inch-standard envelope ensures compatibility with US-market small motors, hobby-grade equipment, radio-controlled car transmissions, model engineering projects, and inch-measurement mechanisms.
Technical Specifications
| Bearing No. | Bore (d) mm | Outer Dia. (D) mm | Width (B) mm | Dyn. Load Cr (kN) | Stat. Load Cor (kN) | Ref. Speed (rpm) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| R2 | 3.175 | 9.525 | 3.175 | 0.49 | 0.19 | 38000 | 0.002 |
| R3 | 4.762 | 12.700 | 3.968 | 0.98 | 0.37 | 32000 | 0.005 |
| R4 | 6.350 | 15.875 | 4.961 | 1.38 | 0.60 | 27000 | 0.009 |
| R6 | 9.525 | 22.225 | 5.555 | 2.38 | 1.06 | 20000 | 0.023 |
| R8 | 12.700 | 28.575 | 6.350 | 3.63 | 1.85 | 16000 | 0.043 |
| R10 | 15.875 | 34.925 | 7.142 | 5.12 | 2.67 | 13000 | 0.070 |
| R12 | 19.050 | 41.275 | 7.938 | 6.67 | 3.63 | 11000 | 0.113 |
| R14 | 22.225 | 47.625 | 8.730 | 8.45 | 4.80 | 9500 | 0.172 |
| R16 | 25.400 | 50.800 | 9.525 | 9.79 | 5.34 | 8500 | 0.209 |
| R18 | 28.575 | 57.150 | 11.113 | 12.01 | 6.67 | 7500 | 0.281 |
| R20 | 31.750 | 63.500 | 12.700 | 14.90 | 8.59 | 7000 | 0.417 |
| R22 | 34.925 | 69.850 | 12.700 | 17.57 | 10.14 | 6500 | 0.522 |
| R24 | 38.100 | 76.200 | 12.700 | 20.46 | 12.01 | 6000 | 0.635 |
