Manufactured by PRS Bearings, the XRU 21040X is a precision XRU Crossed Roller Bearings. You may consider it as an interchangeable alternative and replacement for THK RU297X. Key dimensional parameters include a 210 mm bore diameter, a 380 mm outer diameter, and a 40 mm overall width. With matching boundary dimensions, this component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
XRU 21040X - XRU Crossed Roller Bearings
Technical Specifications
| Direct Interchange | THK RU297X |
|---|---|
| Overview | |
| Basic Model | XRU 21040X |
| Weight | 21.3 kg |
| Dimensions | |
| Bore Dia (d, mm) | 210 mm |
| Outer Dia (D, mm) | 380 mm |
| Width (B, mm) | 40 mm |
| Roller Pitch Dia (Dpw) | 297.3 mm |
| Load Ratings | |
| Dynamic Load (Cr) | 156 kN |
| Static Load (Cor) | 281 kN |
| Performance | |
| Double Seal (ds) | 272 mm |
| Double High-Performance Seal (Dh) | 320 mm |
| Mounting Holes | |
| Outer Ring Hole Pitch Dia. (La) | 350 mm |
| No. of Outer Ring Holes (na) | 16 |
| No. of Inner Ring Holes (ni) | 16 |
210 mm 380 mm 210 mm 380 mm 40 mm 40 mm XRU 21040X Frequently Asked Questions about XRU 21040X XRU Crossed Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The PRS Bearings XRU 21040X features precision-machined corner chamfers designed to facilitate easier mounting. These ISO-standard chamfers ensure that the XRU Crossed Roller Bearings fits snugly against shaft shoulders, preventing stress concentration at the 210 mm bore interface.
PRS Bearings recommends storing the XRU 21040X in its original packaging in a clean, low-vibration warehouse. Maintaining a relative humidity below 60% and a stable room temperature ensures maximum shelf life.
To maximize the performance of the XRU 21040X, PRS Bearings technical engineers suggest a shaft fit of k5/m5 for its 210 mm bore. For the 380 mm outer diameter, an H7 or J7 housing tolerance is ideal to accommodate thermal expansion while maintaining PRS Bearings's signature operational stability.
Yes, while the standard PRS Bearings XRU 21040X meets ISO P0 (ABEC-1) levels, PRS Bearings also manufactures high-precision variants in P6 (ABEC-3) and P5 (ABEC-5) for applications requiring minimal runout and extreme rotational accuracy.