Cross roller bearing RU
CRK cross roller bearings have a compact integral design with a flange on both the inner and outer ring.
Description
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Product Description
CRK cross roller bearings have a compact integral design with a flange on both the inner and outer ring. The rollers are arranged crosswise at an angle of 90°, the total volume of the product is small and thin. Both the inner and outer rings have mounting holes provided for mounting screws, eliminating the need for additional flange bases during installation and ensuring simple and convenient installation.
Thanks to the cross arrangement of the rollers, the bearings are able to simultaneously absorb radial, axial loads and overturning moments. They have high torsional rigidity, high turning accuracy, adjustable working clearance and significantly exceed the rigidity of conventional slewing bearings.
The bearings are suitable for use in precision CNC rotary tables, automated rotary fixtures, measuring instrument rotary platforms, industrial robot joints, indexing mechanisms of small precision grinding machines and other similar applications. They are adapted for precision turning applications, heavy rotational loads in confined spaces and combine high precision, high rigidity and compact installation requirements.
Product Features
| Standard size | Main Dimensions (mm) | Shaft and housing shoulder dimensions (mm) | Basic dynamic load rating | Quality | Inner ring | Outer ring | ||||||||
| Inner diameter d | Outer diameter D | Roller pitch diameter Dpw | Width B | Chamfer radius r_min | ds | Dh | Cr, kN | C₀r, kN | kg | Pitch diameter of PCD1 holes, mm | Hole size | Pitch diameter of PCD2 holes, mm | Hole size | |
| RU 28 | 10 | 52 | 28 | 8 | 0.3 | 24 | 29.5 | 29 | 24 | 0.12 | 16 | 4-M3 through | 42 | 6-φ3.4 through hole φ6.5, countersink depth 3.3 |
| RU 42 | 20 | 70 | 41.5 | 12 | 0.6 | 37 | 47 | 7.35 | 8.35 | 0.29 | 28 | 6-M3 through | 57 | 6-φ3.4 through hole φ6.5, countersink depth 3.3 |
| RU 66 | 35 | 95 | 66 | 15 | 0.6 | 59 | 74 | 17.5 | 22.3 | 0.62 | 45 | 8-M4 through | 83 | 8-φ4.5 through hole, φ8 with countersunk head, depth 4.4 |
| RU 85 | 55 | 120 | 85 | 15 | 0.6 | 79 | 93 | 20.3 | 29.5 | 1 | 65 | 8-M5 through | 105 | 8-φ5.5 through hole, φ9.5 with countersunk head, depth 5.4 |
| RU 124(G) | 80 | 165 | 124 | 22 | 1 | 114 | 134 | 33.1 | 50.9 | 2.6 | 97 | 10-φ5.5 through hole, φ9.5 countersink hole, depth 5.4 10-M5 through hole | 148 | 10-φ5.5 through hole, φ9.5 with countersunk head, depth 5.4 |
| RU 124X | 80 | 165 | 124 | 22 | 1 | 114 | 134 | 33.1 | 50.9 | 2.6 | 97 | 10-φ5.5 through hole, φ9.5 countersink hole, depth 5.4 10-M5 through | 148 | 10-φ5.5 through hole, φ9.5 with countersunk head, depth 5.4 |
| RU 148(G) | 90 | 210 | 147.5 | 25 | 1.5 | 133 | 162 | 49.1 | 76.8 | 4.9 | 112 | 12-φ9 through hole, φ14 countersink hole, depth 8.6 12-M8 through | 187 | 12-φ9 through hole, φ14 with countersunk head, depth 8.6 |
| RU 148X | 90 | 210 | 147.5 | 25 | 1.5 | 133 | 162 | 49.1 | 76.8 | 4.9 | 112 | 12-φ9 through hole, φ14 countersink hole, depth 8.6 12-M8 through | 187 | 12-φ9 through hole φ14 countersink depth 8.6 |
| RU 178(G) | 115 | 240 | 178 | 28 | 1.5 | 161 | 195 | 80.3 | 135 | 6.8 | 139 | 12-φ9 through hole, φ14 countersink hole, depth 8.6 12-M8 through | 217 | 12-φ9 through hole φ14 countersink depth 8.6 |
| RU 178X | 115 | 240 | 178 | 28 | 1.5 | 161 | 195 | 80.3 | 135 | 6.8 | 139 | 12-φ9 through hole, φ14 countersink, depth 8.6 12-M8 through | 217 | 12-φ9 through hole φ14 countersink depth 8.6 |
| RU 228(G) | 160 | 295 | 227.5 | 35 | 2 | 208 | 246 | 104 | 173 | 11.4 | 184 | 12-φ11 through hole, φ17.5 countersink, depth 10.8 12-M10 through | 270 | 12-φ11 through hole φ17.5 countersink depth 10.8 |
| RU 228X | 160 | 295 | 227.5 | 35 | 2 | 208 | 246 | 104 | 173 | 11.4 | 184 | 12-φ11 through hole, φ17.5 countersink, depth 10.8 12-M10 through | 270 | 12-φ11 through hole φ17.5 countersink depth 10.8 |
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