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R Series Bearings

The R series, single row, radial, inch dimension bearings are available from 5/64" bore through 1 1/2" bore size. The conrad construction of the R Series enables these bearings to take thrust as well as radial load. The ball complement design and selection of retainers permits use of this series in high speed motor applications. R Series bearings are produced open, shielded (ZZ), sealed (2RS), stainless (S) or flanged (F). Shielded and sealed bearings are slightly wider as noted in the dimensional table.

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Item # Bore
MM
Bore
Inches
O.D.
MM
O.D.
Inches
Width
MM
Width
Inches
SR1-4 1.9844 0.0781 6.35 0.25 2.38 0.0937
SR1-4ZZ 1.9844 0.0781 6.35 0.25 3.57 0.1406
SR133 2.380 0.0937 4.762 0.1875 1.588 0.0625
SFR133-ZZ 2.380 0.0937 4.762 0.1875 2.380 0.0937
SR133-ZZ 2.38 0.0937 4.762 0.1875 2.38 0.0937
SFR144-ZZ 3.175 0.125 6.35 0.25 2.78 0.1094
SR144-ZZ 3.175 0.125 6.35 0.25 2.78 0.1094
SFR2-5ZZ 3.175 0.125 7.937 0.3125 3.57 0.1406
SR2-5ZZ 3.175 0.125 7.938 0.3125 3.57 0.1406
R2-2RS (99-R2) 3.175 0.125 9.525 0.375 3.96748 0.1562
R2-ZZ (77-R2) 3.175 0.125 9.525 0.375 3.96748 0.1562
SR2-ZZ 3.175 0.125 9.525 0.375 3.9674 0.1562
SR2A-ZZ 3.175 0.125 12.7 0.5 4.366 0.1719
SFR166-ZZ 4.7625 0.1875 9.525 0.375 3.175 0.125
SR166-ZZ 4.7625 0.1875 9.525 0.375 3.175 0.125
R3 4.7625 0.1875 12.7 0.5 3.96748 0.1562
SR3 4.7625 0.1875 12.7 0.5 3.9674 0.1562
FR3-ZZ 4.7625 0.1875 12.7 0.5 4.9784 0.196
R3-2RS (99-R3) 4.7625 0.1875 12.7 0.5 4.9784 0.196
R3-ZZ (77-R3) 4.7625 0.1875 12.7 0.5 4.9784 0.196
SR3-ZZ 4.7625 0.1875 12.7 0.5 4.9784 0.196
SR168-ZZEE 6.350 0.25 9.525 0.375 3.175 0.125
SFR168-ZZ 6.350 0.25 9.525 0.375 3.175 0.125
SR168-ZZ 6.350 0.25 9.525 0.375 3.175 0.125
FR4-2RS 6.35 0.25 15.875 0.625 4.9784 0.196
FR4-ZZ 6.35 0.25 15.875 0.625 4.9784 0.196
R4-2RS (99-R4) 6.35 0.25 15.875 0.625 4.9784 0.196
R4-ZZ (77-R4) 6.35 0.25 15.875 0.625 4.9784 0.196
SFR4-ZZ 6.35 0.25 15.875 0.625 4.9784 0.196
SR4-ZZ 6.35 0.25 15.875 0.625 4.9784 0.196
SR-254 6.35 0.25 17.4625 0.6875 6.35 0.25
R4A-2RS (99-R4A) 6.35 0.25 19.05 0.75 7.14248 0.2812
R4A-ZZ (77-R4A) 6.35 0.25 19.05 0.75 7.14248 0.2812
SR1810-ZZ 7.938 0.3125 12.7 0.5 3.967 0.1562
SR188-ZZ 9.525 0.375 12.7 0.5 4.7625 0.1875
SR1038-ZZ 9.525 0.375 15.875 0.625 3.9674 0.1562
R6 9.525 0.375 22.225 0.875 5.55498 0.2187
FR6-2RS 9.525 0.375 22.225 0.875 7.14248 0.2812
FR6-ZZ 9.525 0.375 22.225 0.875 7.14248 0.2812
R6-2RS (99-R6) 9.525 0.375 22.225 0.875 7.14248 0.2812
R6-ZZ (77-R6) 9.525 0.375 22.225 0.875 7.14248 0.2812
SFR6-ZZ 9.525 0.375 22.225 0.875 7.14248 0.2812
SR6-2RS 9.525 0.375 22.225 0.875 7.14248 0.2812
SR6-ZZ 9.525 0.375 22.225 0.875 7.1424 0.2812
SR6-5 12.7 0.5 22.225 0.875 5.557 0.2188
SR6-5-ZZ 12.7 0.5 22.225 0.875 7.1424 0.2812
R8 12.7 0.5 28.575 1.125 6.35 0.25
R8-2RS (99-R8) 12.7 0.5 28.575 1.125 7.9375 0.3125
FR8-2RS 12.7 0.5 28.575 1.125 7.9375 0.3125
FR8-ZZ 12.7 0.5 28.575 1.125 7.9375 0.3125
R8-ZZ (77-R8) 12.7 0.5 28.575 1.125 7.9375 0.3125
SFR8-2RS 12.7 0.5 28.575 1.125 7.9375 0.3125
SFR8-ZZ 12.7 0.5 28.575 1.125 7.9375 0.3125
SR8-2RS 12.7 0.5 28.575 1.125 7.9375 0.3125
SR8-ZZ 12.7 0.5 28.575 1.125 7.937 0.3125
R10-2RS (99-R10) 15.875 0.625 34.925 1.375 8.72998 0.3437
R10-ZZ (77-R10) 15.875 0.625 34.925 1.375 8.72998 0.3437
R12-2RS (99-R12) 19.05 0.75 41.275 1.625 11.1125 0.4375
R12-ZZ (77-R12) 19.0500 0.75 41.275 1.625 11.11250 0.4375
SR12-ZZ 19.05 0.75 41.275 1.625 11.1125 0.4375
R14-2RS (99-R14) 22.225 0.875 47.625 1.875 12.7 0.5
R14-ZZ (77-R14) 22.225 0.875 47.625 1.875 12.7 0.5
R16-2RS (99-R16) 25.4 1 50.8 2 12.7 0.5
R16-ZZ (77-R16) 25.4 1 50.8 2 12.7 0.5
SR16-2RS 25.4 1 50.800 2 12.700 0.5
R18-2RS (99-R18) 28.575 1.125 53.975 2.125 12.7 0.5
R18-ZZ (77-R18) 28.575 1.125 53.975 2.125 12.7 0.5
R20-2RS (99-R20) 31.75 1.25 57.15 2.25 12.7 0.5
R20-ZZ (77-R20) 31.75 1.25 57.15 2.25 12.7 0.5