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

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