RU Series slewing rings
RU SLEWING RINGS
RU Series
The RU Series crossed roller bearings are essentially miniature slewing rings as they feature bolt holes in the inner and outer rings and are most suited to applications where both inner and outer ring rotation is required.
The rolling elements are inserted through a filling slot in the outer ring. The bearings must not be disassembled under any circumstances as this will affect the bearing’s performance.
The basic sizes are tabulated below. More details are available in the QCB Precision Bearings catalogue
| Outline dimensions | Outer holes | Inner holes | Weight | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| QCB reference | DI | Da | H | r min | ds | Dh | La | na | Li | ni | |
| mm | mm | mm | mm | mm | mm | mm | mm | kg | |||
| RU 28 | 10 | 52 | 8 | 0.3 | 24 | 29.5 | 42 | 6 Ø3.4 CS Ø6.5×3.2 | 16 | 4 M3 | 0.12 |
| RU 42 | 20 | 70 | 12 | 0.6 | 37 | 47 | 57 | 6 Ø3.4 CS Ø6.5×3.2 | 28 | 6 M3 | 0.29 |
| RU 66 | 35 | 95 | 15 | 0.6 | 59 | 74 | 83 | 8 Ø4.5 CS Ø8×4.3 | 45 | 8 M4 | 0.62 |
| RU 85 | 55 | 120 | 15 | 0.6 | 79 | 93 | 105 | 8 Ø5.5 CS Ø9.5×5.4 | 65 | 8 M5 | 1 |
| RU 124 G | 80 | 165 | 22 | 1 | 114 | 134 | 148 | 10 Ø5.5 CS Ø9.5×5.4 | 97 | 10 Ø5.5 CS Ø9.5×5.4 | 2.6 |
| RU 124 X | 80 | 165 | 22 | 1 | 114 | 134 | 148 | 10 Ø5.5 CS Ø9.5×5.4 | 97 | 10 M5 | 2.6 |
| RU 148 G | 90 | 210 | 25 | 1.5 | 133 | 162 | 187 | 12 Ø9 CS Ø14×8.6 | 112 | 12 Ø9 CS Ø14×8.6 | 4.9 |
| RU 148 X | 90 | 210 | 25 | 1.5 | 133 | 162 | 187 | 12 Ø9 CS Ø14×8.6 | 112 | 12 M8 | 4.9 |
| RU 178 G | 115 | 240 | 28 | 1.5 | 161 | 195 | 217 | 12 Ø9 CS Ø14×8.6 | 139 | 12 Ø9 CS Ø14×8.6 | 6.8 |
| RU 178 X | 115 | 240 | 28 | 1.5 | 161 | 195 | 217 | 12 Ø9 CS Ø14×8.6 | 139 | 12 M8 | 6.8 |
| RU 228 G | 160 | 295 | 35 | 2 | 208 | 246 | 270 | 12 Ø11 CSØ17.5×10.8 | 184 | 12 Ø11 CSØ17.5×10.8 | 11.4 |
| RU 228 X | 160 | 295 | 35 | 2 | 208 | 246 | 270 | 12 Ø11 CSØ17.5×10.8 | 184 | 12 M10 | 11.4 |
| RU 297 G | 210 | 380 | 40 | 2.5 | 272 | 320 | 350 | 16 Ø14 CS Ø20×12.8 | 240 | 16 Ø14 CS Ø20×12.8 | 21.3 |
| RU 297 X | 210 | 380 | 40 | 2.5 | 272 | 320 | 350 | 16 Ø14 CS Ø20×12.8 | 240 | 16 M12 | 21.3 |
| RU 445 G | 350 | 540 | 45 | 2.5 | 417 | 473 | 505 | 24 Ø14 CS Ø20×12.8 | 385 | 24 Ø14 CS Ø20×13.8 | 35.4 |
| RU 445 X | 350 | 540 | 45 | 2.5 | 417 | 473 | 505 | 24 Ø14 CS Ø20×12.8 | 385 | 24 M12 | 35.4 |
Characteristics
- Available with clearance or preload (i.e. after installation)
- Available in P5, P4 and P2 precision grades in sizes from Ø10 – Ø350mm bore
- Available with seals both sides, single seal or unsealed
Numbering system
RU Model
124 Size / Pitch diameter of rollers
UU Sealed both sides / leave blank for no seal
CC0 Light preload
C0 Positive clearance
P5 Precision grade (P5, P4 or P2)
G The inner and outer rings are counterbored from opposite sides
– Inner and outer rings counterbored from the same side
X Inner ring threaded
N Lubricating nipple installed in outer ring1
