Ball Bearings
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| R4 Open |
R4 Z 1 Shield |
R4 ZZ 2 Shields |
R4 RS 1 Contact Seal |
R4 2RS 2 Contact Seals |
R4 NR Retain. Ring, Groove on OD |
R SERIES
Extra Light Inch Ball Bearings
The R-Series bearings are single row, inch series bearings available from 1/8 through 1-1/2 inch bore sizes. The Conrad construction of these bearings enables them to accept thrust as well as radial load. Their ball complement and selection of retainers also allows them to work well in high-speed applications. R series bearings are available in open, sealed and shielded configurations. Sealed and shielded bearings may be slightly wider as shown in the table. This series is also available in stainless steel.
| R SERIES BALL BEARINGS | EXTRA LIGHT INCH | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NPB Part No. |
Bore | Outside Diameter | Width | Max. Fillet Radius |
Balls | Static Load Lbs. |
Dynamic Load Lbs. |
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| Frac. | Inch | Tol. | Frac. | Inch | Tol. | Tol. | +.0000 -.0050 |
No. | Diam. | ||||
| Open | Seal/Shield | ||||||||||||
| R2 | 1/8 | .1250 | -.0003 | 3/8 | .3750 | -.0004 | .1562 | .1562 | .012 | 7 | 1/16 | 49 | 113 |
| R3 | 3/16 | .1875 | -.0003 | 1/2 | .5000 | -.0004 | .1562 | .1960 | .012 | 7 | 3/32 | 70 | 145 |
| R4 | 1/4 | .2500 | -.0003 | 5/8 | .6250 | -.0004 | .1960 | .1960 | .012 | 7 | 1/8 | 195 | 385 |
| R4A | 1/4 | .2500 | -.0003 | 3/4 | .7500 | -.0004 | .2188 | .2812 | .016 | 6 | 9/54 | 150 | 320 |
| R6 | 3/8 | .3750 | -.0003 | 7/8 | .8750 | -.0004 | .2188 | .2812 | .016 | 7 | 5/32 | 305 | 570 |
| R8 | 1/2 | .5000 | -.0003 | 1 1/8 | 1.1250 | -.0004 | .2500 | .3125 | .016 | 8 | 3/16 | 500 | 885 |
| R10 | 5/8 | .6250 | -.0003 | 1 3/8 | 1.3750 | -.0005 | .2812 | .3438 | .031 | 9 | 3/16 | 565 | 970 |
| R12 | 3/4 | .7500 | -.0004 | 1 5/8 | 1.6250 | -.0005 | .3125 | .4375 | .031 | 10 | 7/32 | 850 | 1265 |
| R14 | 7/8 | .8750 | -.0004 | 1 7/8 | 1.8750 | -.0005 | .3750 | .5000 | .031 | 10 | 1/4 | 1110 | 1735 |
| R16 | 1 | 1.0000 | -.0004 | 2 | 2.0000 | -.0005 | .3750 | .5000 | .031 | 10 | 1/4 | 1110 | 1735 |
| R18 | 1 1/8 | 1.1250 | -.0004 | 2 1/8 | 2.1250 | -.0005 | .3750 | .5000 | .031 | 11 | 1/4 | 1225 | 1840 |
| R20 | 1 1/4 | 1.2500 | -.0005 | 2 1/4 | 2.2500 | -.0005 | .3750 | .5000 | .031 | 12 | 1/4 | 1335 | 1920 |
Material: Standard SAE 52100
Stainless steel, bronze, plastic/polymer and ceramic bearings available upon request.
Stainless steel, bronze, plastic/polymer and ceramic bearings available upon request.
