Manufactured by CHG Bearing, the 30*56 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.
30*56 - Cylindrical Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 30*56 |
| Brand | CHG® |
| Product Type | Cylindrical Roller |
| Dimensions | |
| Roller Diameter, Dw | 30 mm |
| Roller Length, Lw | 56 mm |
| Center Recess Diameter | 14 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 1 mm |
| Dimensional & Geometrical Accuracy | |
| Roller Diameter Tolerance | -0.02-0.005 mm |
| Roller Length Tolerance | -0.02 to 0 mm |
| Through-hole Runout | - mm |
| End-face Runout | 0.005 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) | 0.32 µm |
| Chamfer Geometry | |
| Axial Chamfer | 1 mm |
| Axial Chamfer Tolerance | -0.4 to +0.4 mm |
| Radial Chamfer | 1 mm |
| Radial Chamfer Tolerance | -0.4 to +0.4 mm |
30*56 30 mm 56 mm Frequently Asked Questions about 30*56 Cylindrical Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As standard production, CHG Bearing subjects 30*56 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
In its sealed configuration (Open Type), CHG Bearing pre-charges 30*56 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
Beyond standard alloy steel, CHG Bearing can customize the 30*56 Cylindrical Rollers using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 30*56, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
