912-309 Crossed Taper Roller Bearings-XR-JXR
The 912-309 bearing is a High Precision Crossed Roller Bearing with an inner diameter of 370 mm , an outer diameter of 495 mm, a width of 50 mm. It typically uses ISO P5/P6 grade precision tolerances and together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
912-309 Crossed taper roller bearings, Machine tools slewing ring, high precision turntable bearings, running accuracy 0.005mm, ISO P4 20YEARS MANUFACTURE CHINA
Precision crossed roller bearings (RIGIA) are designed to offer the highest levels of rotational accuracy and rigidity while conserving space and saving material costs. The bearing features two sets of races and rollers brought together at right angles with alternate rollers facing in opposite directions. This allows two half-rows of rollers to fit into the space of one. The steep-angle, tapered geometry results in a total effective bearing spread much greater than the width of the bearing itself.
Able to withstand high overturning moments, the crossed roller bearing is ideal for the table bearing of machine tools, including vertical boring and grinding machines. It is uniquely suited to many other pivot and pedestal applications where space is limited or the lowest possible center of gravity of a rotating mass is required.
For more detailed information, you could check the catalogue of “Crossed Roller Bearing” or contact RIGIA-BRS Bearing.
| RIGIA/TIMKEN | Main Dimension mm (in) | Compare No. | ||
| Inner D | Outer D | Hight | PSL | |
| d | D | H | ||
| XR496051 | 203.200 | 279.400 | 31.750 | |
| 8.0000 | 11.0000 | 1.2500 | ||
| JXR637050 | 300.000 | 400.000 | 37.000 | |
| 11.8110 | 15.7480 | 1.4567 | ||
| JXR652050 | 310.000 | 425.000 | 45.000 | |
| 12.2047 | 16.7323 | 1.7717 | ||
| XR678052 | 330.200 | 457.200 | 63.500 | PSL 912-309 |
| 13.0000 | 18.0000 | 2.5000 | ||
| JXR699050 | 370.000 | 495.000 | 50.000 | |
| 14.5669 | 19.4882 | 1.9685 | ||
| XR766051 | 457.200 | 609.600 | 63.500 | PSL 912-308 |
| 18.0000 | 24.0000 | 2.5000 | ||
| XR820060 | 580.000 | 760.000 | 80.000 | PSL 912-304 |
| 22.8346 | 29.9213 | 3.1496 | ||
| XR855053 | 685.800 | 914.400 | 79.375 | PSL 912-305 |
| 27.0000 | 36.0000 | 3.1250 | ||
| XR882055 | 901.700 | 1117.600 | 82.550 | PSL 912-306 |
| 35.5000 | 44.0000 | 3.2500 | ||
| XR889058 | 1028.700 | 1327.150 | 114.300 | PSL 912-307 |
| 40.5000 | 52.2500 | 4.5000 | ||
| XR897051 | 1549.400 | 1828.800 | 101.600 | |
| 61.0000 | 72.0000 | 4.0000 | ||
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