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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 EZO | 1.9844 | 0.0781 | 6.35 | 0.25 | 2.38 | 0.0937 |
| SR1-4ZZ EZO | 1.9844 | 0.0781 | 6.35 | 0.25 | 3.57 | 0.1406 |
| SR133 EZO | 2.380 | 0.0937 | 4.762 | 0.1875 | 1.588 | 0.0625 |
| SFR133-ZZ EZO | 2.380 | 0.0937 | 4.762 | 0.1875 | 2.380 | 0.0937 |
| SR133-ZZ EZO | 2.38 | 0.0937 | 4.762 | 0.1875 | 2.38 | 0.0937 |
| SFR144-ZZ EZO | 3.175 | 0.125 | 6.35 | 0.25 | 2.78 | 0.1094 |
| SR144-ZZ EZO | 3.175 | 0.125 | 6.35 | 0.25 | 2.78 | 0.1094 |
| 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 EZO | 3.175 | 0.125 | 9.525 | 0.375 | 3.9674 | 0.1562 |
| SR2A-ZZ EZO | 3.175 | 0.125 | 12.7 | 0.5 | 4.366 | 0.1719 |
| SFR166-ZZ EZO | 4.7625 | 0.1875 | 9.525 | 0.375 | 3.175 | 0.125 |
| SR166-ZZ EZO | 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 EZO | 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 EZO | 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 EZO | 6.350 | 0.25 | 9.525 | 0.375 | 3.175 | 0.125 |
| SR168-ZZ EZO | 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 EZO | 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 EZO | 7.938 | 0.3125 | 12.7 | 0.5 | 3.967 | 0.1562 |
| SR188-ZZ EZO | 9.525 | 0.375 | 12.7 | 0.5 | 4.7625 | 0.1875 |
| SR1038-ZZ EZO | 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 EZO | 9.525 | 0.375 | 22.225 | 0.875 | 7.1424 | 0.2812 |
| SR6-5 EZO | 12.7 | 0.5 | 22.225 | 0.875 | 5.557 | 0.2188 |
| SR6-5-ZZ EZO | 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 EZO | 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 |