Inch Miniature Flanged 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)
FR0 Open 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0625" | 1.588 mm 21 6 110
FR0zz Shielded 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0937" | 2.380 mm 21 6 110
FR1 Open 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.0781" | 1.984 mm 44 12 90
FR1zz Shielded 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.1094" | 2.779 mm 44 12 90
FR1-4 Open 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.0937" | 2.380 mm 54 17 67
FR1-4 2rs Sealed 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.1406" | 3.571 mm 54 17 67
FR1-4zz Shielded 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.1406" | 3.571 mm 54 17 67
FR1-5 Open 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 106 32 60
FR1-5 2rs Sealed 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 106 32 60
FR1-5zz Shielded 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 106 32 60
FR133 Open 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0625" | 1.588 mm 36 11 80
FR133 2rs Sealed 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 28 10 80
FR133zz Shielded 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 28 10 80
FR144 Open 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.0937" | 2.380 mm 54 17 67
FR144 2rs Sealed 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.1094" | 2.779 mm 54 17 67
FR144zz Shielded 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.1094" | 2.779 mm 54 17 67
FR2 Open 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 121 39 56
FR2 2rs Sealed 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 121 39 56
FR2zz Shielded 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 121 39 56
FR2-5 Open 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 107 32 60
FR2-5 2rs Sealed 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 107 32 60
FR2-5zz Shielded 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 107 32 60
FR2-6 Open 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1094" | 2.779 mm 122 41 53
FR2-6 2rs Sealed 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1406" | 3.571 mm 122 41 53
FR2-6zz Shielded 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1406" | 3.571 mm 122 41 53
FR155 Open 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 69 27 53
FR155 2rs Sealed 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 69 27 53
FR155zz Shielded 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 69 27 53
FR156 Open 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 69 27 53
FR156 2rs Sealed 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 69 27 53
FR156zz Shielded 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 69 27 53
FR166 Open 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 136 49 50
FR166 2rs Sealed 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 136 49 50
FR166zz Shielded 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 136 49 50
FR3 Open 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1906" | 4.841 mm 249 88 43
FR3 2rs Sealed 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1906" | 4.841 mm 249 88 43
FR3zz Shielded 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1906" | 4.841 mm 249 88 43
FR168 Open 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 71 31 48
FR168 2rs Sealed 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 71 31 48
FR168zz Shielded 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 71 31 48
FR188 Open 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1250" | 3.175 mm 344 80 40
FR188 2rs Sealed 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1875" | 4.763 mm 344 80 40
FR188zz Shielded 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1875" | 4.763 mm 344 80 40
FR4 Open 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 283 112 38
FR4 2rs Sealed 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 283 112 38
FR4zz Shielded 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 283 112 38
FR1810 Open 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 104 50 40
FR1810 2rs Sealed 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 104 50 40
FR1810zz Shielded 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 104 50 40
FR6 Open 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2188" | 5.558 mm 637 256 32
FR6 2rs Sealed 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2812" | 7.142 mm 637 256 32
FR6zz Shielded 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2812" | 7.142 mm 637 256 32

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