XR855053 Precision Crossed Roller Bearings
The XR855053 Crossed roller bearings are suitable for high-precision, high-rigidity, and space-constrained rotary applications. Classic applications include industrial robot joints and positioners, CNC machine tool rotary tables and indexing heads, medical CT scanner rotating frames, radar antenna rotation mechanisms, precision measuring instruments, and aerospace simulation rotary tables.
The XR855053 bearing is a Precision Crossed roller bearings with an inner diameter of 685.8 mm , an outer diameter of 914.4 mm, a width of 79.375 mm. bearing steel rings, bearing steel rolling mlement. Its dynamic radial rated load is approximately 268725 N, Its dynamic axial rated load is approximately 342174 N, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: SKF 615659A, NACHI 0685XRN091, URB XD.10.0686P5, PSL 912-305A
XR855053 bearings ( 685.8 mm x 914.4 mm x 79.375 mm) have the advantages of The rollers are arranged in a cross pattern, allowing them to withstand radial, axial, and overturning moments simultaneously. They offer high rigidity and rotational accuracy while compact and space-saving design, and easy installation, and are therefore widely used in the Industrial robots, CNC machine tools, medical equipment, precision measuring instruments and aerospace.
| Part Number | XR855053 |
| Design type | TXR |
| Bearing Type | Precision Crossed roller bearings |
| Interchangeable | TIMKEN XR855053 |
| Manufacturer Part Code | XR 855053 |
| Series | XR |
| Units | XR = Inch |
| Ca Axial Dynamic [lbf] | 76920 |
| Cr Dynamic Radial [lbf] | 60409 |
| d φ Inside [inch] | 26.9999 |
| D Φ Outside [inch] | 35.9999 |
| T Width [inch] | 3.1250 |
| R (Max) Shaft Fillet Radius [inch] | 0.1299 |
| Weight [lb] | 342.8153 |
| Preload | 0.075 to 0.100 mm |
| K Factor | 0.45 |
The XR855053 Crossed roller bearings consist of inner and outer rings, cylindrical rollers, spacers, and seals. The rollers are arranged at 90° intervals within a V-shaped raceway, allowing for multi-directional load bearing even in a single row.
Crossed roller bearings can simultaneously withstand radial loads, bidirectional axial loads, and overturning moments. They possess extremely high rigidity and rotational accuracy, and their compact structure saves installation space, simplifying machine tool design.
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