Miniature Extended BearingsPart Interchange

Open

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.

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)
RW0 Open 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0625" | 1.588 mm 21 6 110
RW0zz Shielded 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0937" | 2.380 mm 21 6 110
RW1 Open 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.0781" | 1.984 mm 44 12 90
RW1zz Shielded 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.1094" | 2.779 mm 44 12 90
RW1-4 Open 0.0781" | 1.984 mm 0.25" | 6.350 mm 0.0937" | 2.380 mm 54 17 67
RW1-4zz Shielded 0.0781" | 1.984 mm 0.25" | 6.350 mm 0.1406" | 3.571 mm 54 17 67
RW133 Open 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0625" | 1.588 mm 28 10 80
RW133zz Shielded 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 28 10 80
RW1-5 Open 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 106 32 60
RW1-5zz Shielded 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 106 32 60
RW144 Open 0.125" | 3.175 mm 0.25" | 6.350 mm 0.0937" | 2.380 mm 54 17 67
RW144zz Shielded 0.125" | 3.175 mm 0.25" | 6.350 mm 0.1094" | 2.779 mm 54 17 67
RW2-5 Open 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 107 32 60
RW2-5zz Shielded 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 107 32 60
RW2-6 Open 0.125" | 3.175 mm 0.375" | 9.525 mm 0.1094" | 2.779 mm 122 41 53
RW2-6zz Shielded 0.125" | 3.175 mm 0.375" | 9.525 mm 0.1406" | 3.571 mm 122 41 53
RW2 Open 0.125" | 3.175 mm 0.375" | 9.525 mm 0.1562" | 3.967 mm 121 39 56
RW2zz Shielded 0.125" | 3.175 mm 0.375" | 9.525 mm 0.1562" | 3.967 mm 121 39 56
RW155 Open 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 69 27 53
RW155zz Shielded 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.125" | 3.175 mm 69 27 53
RW156 Open 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 69 27 53
RW156zz Shielded 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.125" | 3.175 mm 69 27 53
RW166 Open 0.1875" | 4.763 mm 0.375" | 9.525 mm 0.125" | 3.175 mm 136 49 50
RW166zz Shielded 0.1875" | 4.763 mm 0.375" | 9.525 mm 0.125" | 3.175 mm 136 49 50
RW3 Open 0.1875" | 4.763 mm 0.5" | 12.700 mm 0.1562" | 3.967 mm 249 88 43
RW3zz Shielded 0.1875" | 4.763 mm 0.5" | 12.700 mm 0.196" | 4.978 mm 249 88 43
RW168 Open 0.25" | 6.350 mm 0.375" | 9.525 mm 0.125" | 3.175 mm 71 31 48
RW168zz Shielded 0.25" | 6.350 mm 0.375" | 9.525 mm 0.125" | 3.175 mm 71 31 48
RW188 Open 0.25" | 6.350 mm 0.5" | 12.700 mm 0.125" | 3.175 mm 207 80 40
RW188zz Shielded 0.25" | 6.350 mm 0.5" | 12.700 mm 0.1875" | 4.763 mm 207 80 40
RW4 Open 0.25" | 6.350 mm 0.625" | 15.875 mm 0.196" | 4.978 mm 283 112 38
RW4zz Shielded 0.25" | 6.350 mm 0.625" | 15.875 mm 0.196" | 4.978 mm 283 112 38
RW1810 Open 0.3125" | 7.938 mm 0.5" | 12.700 mm 0.1562" | 3.967 mm 104 50 40
RW1810zz Shielded 0.3125" | 7.938 mm 0.5" | 12.700 mm 0.1562" | 3.967 mm 104 50 40

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