Manufactured by PRS Bearings, the XRU 21040 is a precision XRU Crossed Roller Bearings. You may consider it as an interchangeable alternative and replacement for THK RU297. 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 21040 - XRU Crossed Roller Bearings
Technical Specifications
| Direct Interchange | THK RU297 |
|---|---|
| Overview | |
| Basic Model | XRU 21040 |
| 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 21040 Frequently Asked Questions about XRU 21040 XRU Crossed Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The XRU 21040 produced by PRS Bearings adheres to strict ISO standards with a bore diameter of 210 mm, an outer diameter of 380 mm, and a width of 40 mm. PRS Bearings utilizes advanced grinding technology to ensure a radial section wall thickness of 85.0 mm and a balanced D/d ratio of 1.81 for high-precision housing fits.
PRS Bearings provides the XRU 21040 with various cage options including high-strength pressed steel, machined brass for high-vibration tasks, or reinforced polymers for the quietest operation in precision machinery.
Yes, beyond standard ISO specifications, PRS Bearings can produce the XRU 21040 with tailored radial internal clearances and ultra-precision accuracy classes to meet the strict demands of specialized OEM applications.
PRS Bearings recommends storing the XRU 21040 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.