Manufactured by CHG Bearing, the 30*56.17 is a precision Tapered 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*56.17 - Tapered Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 30*56.17 |
| Brand | CHG® |
| Product Type | Tapered Roller |
| Taper Angle | 1°5′0″ |
| Dimensions | |
| Roller Length, Lw | 56.17 mm |
| Center Recess Diameter | 15 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 1 mm |
| Large-end Diameter, Dw | 30 mm |
| Spherical End Radius, SR | 674 mm |
| Through-hole Chamfer | - mm |
| Large-end Diameter Tolerance | -0.02 to +0.02 mm |
| Through-hole Coaxiality | - mm |
| Rolling Surface Roughness, Ra (µm) | 0.125 |
| Axial Chamfer — Large End | 1 mm |
| Axial Chamfer Tolerance — Large End | 0 to +0.5 mm |
| Radial Chamfer — Large End | 1 mm |
| Radial Chamfer Tolerance — Large End | 0 to +0.5 mm |
| Axial Chamfer — Small End | 1 mm |
| Axial Chamfer Tolerance — Small End | 0 to +0.5 mm |
| Radial Chamfer — Small End | 1 mm |
| Radial Chamfer Tolerance — Small End | 0 to +0.5 mm |
| Performance | |
| Spherical End Surface Roughness, Ra (µm) | 0.2 µm |
| Dimensional & Geometrical Accuracy | |
| Roller Length Tolerance | -0.2 to 0 mm |
| End-face Runout | - mm |
| Diameter Variation Between Ends | ±0.0025 mm |
| Roundness | 0.0015 mm |
| Ovality | 0.0015 mm |
30*56.17 30 mm 56.17 mm 674 mm Frequently Asked Questions about 30*56.17 Tapered Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Yes, 100% of 30*56.17 Tapered 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.
To ensure optimum performance of CHG Bearing 30*56.17 Tapered 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.
The CHG Bearing 30*56.17 is rated for limiting speeds up to standard rated RPM under forced oil-mist or circulating oil lubrication regimes. When lubricated with factory-filled synthetic high-speed grease, safe continuous velocity is maintained at approximately 75% to 85% of the maximum nominal limit, preventing thermal runaway.
Quality starts with raw material selection: CHG Bearing crafts 30*56.17 inner and outer rings from high-purity High-Quality Chrome Steel (GCr15/100Cr6). Our raw billets undergo vacuum degassing and secondary ESR (electroslag remelting) processes to drastically eliminate non-metallic sulfide and oxide inclusions, elevating subsurface contact fatigue resistance.
