Manufactured by CHG Bearing, the 20*30 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.
20*30 - Cylindrical Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 20*30 |
| Brand | CHG® |
| Product Type | Cylindrical Roller |
| Dimensions | |
| Roller Diameter, Dw | 20 mm |
| Roller Length, Lw | 30 mm |
| Center Recess Diameter | 9 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 0.7 mm |
| Dimensional & Geometrical Accuracy | |
| Roller Diameter Tolerance | -0.02-0.005 mm |
| Roller Length Tolerance | -0.04 to 0 mm |
| Through-hole Runout | - mm |
| End-face Runout | 0.006 mm |
| Diameter Variation Between Ends | 0.002 mm |
| Roundness | 0.001 mm |
| Ovality | 0.001 mm |
| Surface Finish | |
| Outside Diameter Surface Roughness, Ra (µm) | 0.16 µm |
| End-face Surface Roughness, Ra (µm) | 0.25 µm |
| Chamfer Geometry | |
| Axial Chamfer | 0.7 mm |
| Axial Chamfer Tolerance | -0.3 to +0.3 mm |
| Radial Chamfer | 0.7 mm |
| Radial Chamfer Tolerance | -0.3 to +0.3 mm |
20*30 20 mm 30 mm Frequently Asked Questions about 20*30 Cylindrical Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Each 20*30 produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit ( mm bore side) ensures perfect planar contact without edge binding.
Yes, 100% of 20*30 Cylindrical Rollers leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 20*30, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
To ensure optimum performance of CHG Bearing 20*30 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.
