Manufactured by CHG Bearing, the 55*55 is a precision Cylindrical Rollers. Key dimensional parameters include a mm bore diameter, a mm outer diameter, and a mm overall width. 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.
55*55 - Cylindrical Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 55*55 |
| Brand | CHG® |
| Product Type | Cylindrical Roller |
| Dimensions | |
| Roller Diameter, Dw | 55 mm |
| Roller Length, Lw | 55 mm |
| Center Recess Diameter | 22 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 1.5 mm |
| Dimensional & Geometrical Accuracy | |
| Roller Diameter Tolerance | -0.024 to +0.005 mm |
| Roller Length Tolerance | -0.04 to 0 mm |
| Through-hole Runout | - mm |
| End-face Runout | 0.01 mm |
| Diameter Variation Between Ends | 0.002 mm |
| Roundness | 0.0025 mm |
| Ovality | 0.002 mm |
| Surface Finish | |
| Outside Diameter Surface Roughness, Ra (µm) | 0.25 µm |
| End-face Surface Roughness, Ra (µm) | 0.32 µm |
| Chamfer Geometry | |
| Axial Chamfer | 1.6 mm |
| Axial Chamfer Tolerance | -0.5 to +0.5 mm |
| Radial Chamfer | 1.6 mm |
| Radial Chamfer Tolerance | -0.5 to +0.5 mm |
55*55 55 mm 55 mm Frequently Asked Questions about 55*55 Cylindrical Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 55*55 correlates its dynamic capacity (standard dynamic) with equivalent dynamic loads. In controlled industrial settings with proper contamination-free filtration, field data confirms continuous operational longevity exceeding 20,000 to 50,000 service hours.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 55*55. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Standard batches of CHG Bearing 55*55 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
To ensure optimum performance of CHG Bearing 55*55 Cylindrical Rollers under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the mm bore. For the mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
