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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 93.43 26.70 110
FR0zz Shielded 0.0469" | 1.191 mm 0.1562" | 3.967 mm 0.0937" | 2.380 mm 93.43 26.70 110
FR1 Open 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.0781" | 1.984 mm 195.76 53.39 90
FR1zz Shielded 0.055" | 1.397 mm 0.1875" | 4.763 mm 0.1094" | 2.779 mm 195.76 53.39 90
FR1-4 Open 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.0937" | 2.380 mm 240.26 75.64 67
FR1-4 2rs Sealed 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.1406" | 3.571 mm 240.26 75.64 67
FR1-4zz Shielded 0.0781" | 1.984 mm 0.2500" | 6.350 mm 0.1406" | 3.571 mm 240.26 75.64 67
FR1-5 Open 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 471.62 142.37 60
FR1-5 2rs Sealed 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 471.62 142.37 60
FR1-5zz Shielded 0.0937" | 2.380 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 471.62 142.37 60
FR133 Open 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0625" | 1.588 mm 160.17 48.94 80
FR133 2rs Sealed 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 124.58 44.49 80
FR133zz Shielded 0.0937" | 2.380 mm 0.1875" | 4.763 mm 0.0937" | 2.380 mm 124.58 44.49 80
FR144 Open 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.0937" | 2.380 mm 240.26 75.64 67
FR144 2rs Sealed 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.1094" | 2.779 mm 240.26 75.64 67
FR144zz Shielded 0.125" | 3.175 mm 0.2500" | 6.350 mm 0.1094" | 2.779 mm 240.26 75.64 67
FR2 Open 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 538.35 173.52 56
FR2 2rs Sealed 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 538.35 173.52 56
FR2zz Shielded 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1562" | 3.967 mm 538.35 173.52 56
FR2-5 Open 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 476.06 142.37 60
FR2-5 2rs Sealed 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 476.06 142.37 60
FR2-5zz Shielded 0.125" | 3.175 mm 0.3125" | 7.938 mm 0.1406" | 3.571 mm 476.06 142.37 60
FR2-6 Open 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1094" | 2.779 mm 542.80 182.42 53
FR2-6 2rs Sealed 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1406" | 3.571 mm 542.80 182.42 53
FR2-6zz Shielded 0.125" | 3.175 mm 0.3750" | 9.525 mm 0.1406" | 3.571 mm 542.80 182.42 53
FR155 Open 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 306.99 120.13 53
FR155 2rs Sealed 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
FR155zz Shielded 0.1562" | 3.967 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
FR156 Open 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1094" | 2.779 mm 306.99 120.13 53
FR156 2rs Sealed 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
FR156zz Shielded 0.1875" | 4.763 mm 0.3125" | 7.938 mm 0.1250" | 3.175 mm 306.99 120.13 53
FR166 Open 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 605.09 218.01 50
FR166 2rs Sealed 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 605.09 218.01 50
FR166zz Shielded 0.1875" | 4.763 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 605.09 218.01 50
FR3 Open 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1906" | 4.841 mm 1107.85 391.53 43
FR3 2rs Sealed 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1906" | 4.841 mm 1107.85 391.53 43
FR3zz Shielded 0.1875" | 4.763 mm 0.5000" | 12.700 mm 0.1906" | 4.841 mm 1107.85 391.53 43
FR168 Open 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 315.89 137.93 48
FR168 2rs Sealed 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 315.89 137.93 48
FR168zz Shielded 0.25" | 6.350 mm 0.3750" | 9.525 mm 0.1250" | 3.175 mm 315.89 137.93 48
FR188 Open 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1250" | 3.175 mm 1530.52 355.94 40
FR188 2rs Sealed 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1875" | 4.763 mm 1530.52 355.94 40
FR188zz Shielded 0.25" | 6.350 mm 0.5000" | 12.700 mm 0.1875" | 4.763 mm 1530.52 355.94 40
FR4 Open 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
FR4 2rs Sealed 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
FR4zz Shielded 0.25" | 6.350 mm 0.6250" | 15.875 mm 0.1960" | 4.978 mm 1259.12 498.31 38
FR1810 Open 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 462.72 222.46 40
FR1810 2rs Sealed 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 462.72 222.46 40
FR1810zz Shielded 0.3125" | 7.938 mm 0.5000" | 12.700 mm 0.1562" | 3.967 mm 462.72 222.46 40
FR6 Open 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2188" | 5.558 mm 2834.14 1139.00 32
FR6 2rs Sealed 0.375" | 9.525 mm 0.8750" | 22.225 mm 0.2812" | 7.142 mm 2834.14 1139.00 32
FR6zz 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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