Miniature Inch BearingsPart Interchange

Open

Sealed

Shielded

Open bearings dissipate heat more efficiently than shielded and sealed bearings.

Shielded bearings block out dust and other contaminants, but do not dissipate heat as efficiently as open bearings.

Sealed bearings block out dust and other contaminants better than open and shielded bearings, but retain the most heat.

Product
Number
Seal
Type
Bore Dia (d) Outer Dia (D) Width (B) Dynamic
Load
Rating
(Cr) (N)
Static
Load
Rating
(Cor) (N)
MAX
SPEED
(GREASE)
(X1000
RPM)
R09 Open 0.04" | 1.016 mm 0.1250" | 3.175 mm 0.0469" | 1.191 mm 88.98 22.25 130
R0 Open 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0625" | 1.588 mm 93.43 26.70 110
R0zz Shielded 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0937" | 2.380 mm 93.43 26.70 110
R1 Open 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.0781" | 1.984 mm 195.76 53.39 90
R1zz Shielded 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.1094" | 2.779 mm 195.76 53.39 90
R1-4 Open 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.0937" | 2.380 mm 240.26 75.64 67
R1-4 2rs Sealed 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.1406" | 3.571 mm 240.26 75.64 67
R1-4zz Shielded 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.1406" | 3.571 mm 240.26 75.64 67
R1-5 Open 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 471.62 142.37 60
R1-5 2rs Sealed 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 471.62 142.37 60
R1-5zz Shielded 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 471.62 142.37 60
R133 Open 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0625" | 1.588 mm 160.17 48.94 80
R133 2rs Sealed 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 124.58 44.49 80
R133zz Shielded 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 124.58 44.49 80
R144 Open 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.0937" | 2.380 mm 240.26 75.64 67
R144 2rs Sealed 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.1094" | 2.779 mm 240.26 75.64 67
R144zz Shielded 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.1094" | 2.779 mm 240.26 75.64 67
R2 Open 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 538.35 173.52 56
R2 2rs Sealed 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 538.35 173.52 56
R2zz Shielded 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 538.35 173.52 56
R2-5 Open 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 476.06 142.37 60
R2-5 2rs Sealed 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 476.06 142.37 60
R2-5zz Shielded 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 476.06 142.37 60
R2-6 Open 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1094" | 2.779 mm 542.80 182.42 53
R2-6 2rs Sealed 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1406" | 3.571 mm 542.80 182.42 53
R2-6zz Shielded 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1406" | 3.571 mm 542.80 182.42 53
R2A Open 0.125" | 3.175 mm 0.5000" | 12.700 mm 0.1719" | 4.366 mm 542.80 182.42 53
R2A 2rs Sealed 0.125" | 3.175 mm 0.5000" | 12.700 mm 0.1719" | 4.366 mm 542.80 182.42 53
R2Azz Shielded 0.125" | 3.175 mm 0.5000" | 12.700 mm 0.1719" | 4.366 mm 542.80 182.42 53
R155 Open 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 306.99 120.13 53
R155 2rs Sealed 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
R155zz Shielded 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
R156 Open 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 306.99 120.13 53
R156 2rs Sealed 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
R156zz Shielded 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
R166 Open 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 605.09 218.01 50
R166 2rs Sealed 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 605.09 218.01 50
R166zz Shielded 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 605.09 218.01 50
R3 Open 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 1107.85 391.53 43
R3 2rs Sealed 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1960" | 4.978 mm 1107.85 391.53 43
R3zz Shielded 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1960" | 4.978 mm 1107.85 391.53 43
R3A 2rs Sealed 0.1875" | 4.763 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
R3Azz Shielded 0.1875" | 4.763 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
R3A Open 0.1875" | 4.763 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
R168 Open 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 315.89 137.93 48
R168 2rs Sealed 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 315.89 137.93 48
R168zz Shielded 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 315.89 137.93 48
R188 Open 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1250" | 3.175 mm 920.98 355.94 40
R188 2rs Sealed 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1875" | 4.763 mm 920.98 355.94 40
R188zz Shielded 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1875" | 4.763 mm 920.98 355.94 40
R4 Open 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
R4 2rs Sealed 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
R4zz Shielded 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
R4A Open 0.25" | 6.350 mm 0.7500" | 19.050 mm 0.2188" | 5.558 mm 1984.34 716.32 36
R4A 2rs Sealed 0.25" | 6.350 mm 0.7500" | 19.050 mm 0.2812" | 7.142 mm 1984.34 716.32 36
R4Azz Shielded 0.25" | 6.350 mm 0.7500" | 19.050 mm 0.2812" | 7.142 mm 1984.34 716.32 36
R1810 Open 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 462.72 222.46 40
R1810 2rs Sealed 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 462.72 222.46 40
R1810zz Shielded 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 462.72 222.46 40
R6 Open 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2188" | 5.558 mm 2834.14 1139.00 32
R6 2rs Sealed 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2812" | 7.142 mm 2834.14 1139.00 32
R6zz Shielded 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2812" | 7.142 mm 2834.14 1139.00 32

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