XRU II series crossed roller slewing bearings combine high precision, high rigidity and high load carrying capacity in a unique structural design, making them ideal for achieving excellent performance.
| XRU II Series Cross Roller Slewing bearing | |||||||||||||
| Model | drawing | Weight（Kg） | Mounting dimensions | Corresponding type | |||||||||
| list | Da | DaZT | di | diZT | Di | da | H | h | T | t | INA | ||
| XRU05.0077 | 1 | 1 | 112 | — | 40 | — | 77.5 | 74 | 22 | 21 | — | — | XU050077 |
| XRU06.0094 | 1 | 2 | 140 | — | 57 | — | 94.6 | 93.4 | 26 | 25 | — | — | XU060094 |
| XRU06.0111 | 2 | 1 | 145.79 | — | 76.2 | — | 11.8 | — | 15.87 | — | — | — | XU060111 |
| XRU08.0120 | 3 | 4 | 170 | — | 69 | — | 120.6 | 119.4 | 30 | — | — | — | XU080120 |
| XRU08.0149 | 4 | 4 | 196.85 | — | 101.6 | — | 149.6 | — | 22.22 | 22.22 | — | — | XU080149 |
| XRU12.0179 | 5 | 7 | 234 | 232 | 124.5 | 126.5 | 180±0.2 | 178±0.2 | 35 | 30 | 5 | 5 | XU120179 |
| XRU12.0222 | 6 | 12 | 300 | — | 140 | — | 224 | 220 | 36 | 30 | — | — | XU120222 |
| XRU16.0260 | 5 | 16 | 329 | 327 | 191 | 193 | 261 | 259 | 46 | 41 | 7 | 7 | XU160260 |
| XRU08.0264 | 7 | 7 | 311 | — | 216 | — | 265 | 263 | 25 | 25 | — | — | XU080264 |
| XRU16.0405 | 5 | 25 | 474 | 472 | 336 | 338 | 406 | 404 | 46 | 41 | 7 | 7 | XU160405 |
| XRU08.0430 | 8 | 12 | 480 | — | 380 | — | 431 | 429 | 26 | 26 | — | — | XU080430 |
| XRU30.0515 | 5 | 115 | 646 | 644 | 384 | 386 | 516 | 514 | 86 | 79 | 12 | 12 | XU300515 |
| Model | Drawing | Installation Hole Size（mm） | Basic Load Rating（Kn） | Corresponding to the model | |||||||||
| List | La | Li | na | ni | dB | ds | ts | axial load | Radial Load | INA | |||
| Ca Dynamic Load | Coa Static Load | Ca dynamic Load | Coastatic Load | ||||||||||
| XRU05.0077 | 1 | 97 | 56 | 6 | 6 | 7 | 11 | 6 | 22 | 29 | 14 | 14 | XU050077 |
| XRU06.0094 | 1 | 120 | 70 | 6 | 6 | 9 | 15 | 6 | 33 | 38 | 21 | 18 | XU060094 |
| XRU06.0111 | 2 | 133 | 89 | 8 | 8 | 7 | 11 | 6 | 36 | 45 | 23 | 22 | XU060111 |
| XRU08.0120 | 3 | 148 | 90 | 6 | 6 | 9 | 15 | 9 | 56 | 53 | 36 | 26 | XU080120 |
| XRU08.0149 | 4 | 178 | 116 | 16 | 16 | 7 | 11 | 6 | 63 | 66 | 40 | 33 | XU080149 |
| XRU12.0179 | 5 | 214 | 115 | 12 | 12 | 11 | — | — | 118 | 179 | 75 | 88 | XU120179 |
| XRU12.0222 | 6 | 270 | 170 | 12 | 12 | 18 | — | — | 133 | 275 | 85 | 131 | XU120222 |
| XRU16.0260 | 5 | 305 | 215 | 20 | 20 | 14 | — | — | 212 | 350 | 135 | 173 | XU160260 |
| XRU08.0264 | 7 | 295 | 232 | 12 | 12 | 9 | 14 | 9 | 85 | 117 | 54 | 57 | XU080264 |
| XRU16.0405 | 5 | 450 | 360 | 30 | 30 | 14 | — | — | 270 | 550 | 172 | 270 | XU160405 |
| XRU08.0430 | 8 | 462 | 398 | 20 | 20 | 9 | 15 | 9 | 110 | 280 | 70 | 138 | XU080430 |
| XRU30.0515 | 5 | 598 | 432 | 18 | 18 | 26 | — | — | 720 | 1370 | 455 | 670 | XU300515 |
Cross roller slewing bearings are special precision bearings whose unique internal structure is the key to their superior performance. In the XRU II series, the rollers are arranged in 90° V-grooves and separated by spacer blocks between the rollers. This design allows a single bearing to simultaneously support loads from all directions, including:
Radial loads
Axial loads
Tilting moments
This is a significant departure from conventional bearing designs, which often require the combination of two separate bearings to achieve a similar effect. As a result, the XRU II series of cross roller bearings not only simplifies design, but also saves space, making them an indispensable core component in precision equipment.
1. Extreme Rotational Accuracy and Rigidity
Thanks to the cross arrangement of the rollers and the preloaded design, the XRU II series can provide extremely high rotational accuracy. Whether it is a robot joint that requires precise angular positioning or a CNC machine tool rotary table that requires high precision, XRU II series can ensure the smooth and precise operation of the equipment.
2. Powerful Load Carrying Capability
The special construction of the XRU II series allows it to withstand huge combined loads in a compact volume. This makes it ideal for use in:
Medical equipment, such as CT machines and operating tables, which require stable and reliable support.
Radar antennas and satellite communication equipment that need to withstand wind and other external loads.
Precision measuring instruments to ensure the accuracy of measurement results.
3. Simplified Design and Space Saving
Since one XRU II series bearing can replace a pair of angular contact ball bearings or tapered roller bearings in traditional design, it greatly simplifies the design of the equipment, reduces the mounting space and lowers the overall weight. This is invaluable for modern equipment in pursuit of miniaturization and light weight.
When selecting an XRU II series cross roller slewing bearing, you need to consider the following key factors:
Load type and size: Determine the maximum radial, axial and moment loads that your equipment needs to withstand.
Accuracy requirements: Select the appropriate accuracy class (e.g. P2, P4, etc.) for your application.
Speed and operating environment: Evaluate the operating speed of the bearing and the environmental conditions such as temperature and humidity that may be encountered.
Mounting Methods: The XRU II series supports a variety of mounting methods to ensure that it is a perfect match for your equipment structure.
All in all, XRU II series cross roller slewing bearings can not only significantly improve the performance of your equipment, but also simplify the design and save costs. Whether it's a robot, a CNC machine tool, or any other piece of equipment that requires high-precision rotary support, the XRU II series is the ideal choice for superior performance.
