Manufactured by CHG Bearing, the 56.3*77.25 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.
56.3*77.25 - Tapered Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 56.3*77.25 |
| Brand | CHG® |
| Product Type | Tapered Roller |
| Taper Angle | 1°1' |
| Dimensions | |
| Roller Length, Lw | 77.25 mm |
| Center Recess Diameter | 30 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 2 mm |
| Large-end Diameter, Dw | 56.3 mm |
| Spherical End Radius, SR | 1507 mm |
| Through-hole Chamfer | - mm |
| Large-end Diameter Tolerance | -0.015 to +0.03 mm |
| Through-hole Coaxiality | - mm |
| Rolling Surface Roughness, Ra (µm) | 0.4 |
| Axial Chamfer — Large End | 1.5 mm |
| Axial Chamfer Tolerance — Large End | -0.5 to +0.5 mm |
| Radial Chamfer — Large End | 1.2 mm |
| Radial Chamfer Tolerance — Large End | -0.4 to +0.4 mm |
| Axial Chamfer — Small End | 1.2 mm |
| Axial Chamfer Tolerance — Small End | -0.4 to +0.4 mm |
| Radial Chamfer — Small End | 1.5 mm |
| Radial Chamfer Tolerance — Small End | -0.5 to +0.5 mm |
| Performance | |
| Spherical End Surface Roughness, Ra (µm) | 0.4 µm |
| Dimensional & Geometrical Accuracy | |
| Roller Length Tolerance | -0.5 to 0 mm |
| End-face Runout | - mm |
| Diameter Variation Between Ends | ±0.005 mm |
| Roundness | 0.004 mm |
| Ovality | 0.004 mm |
56.3*77.25 56.3 mm 77.25 mm 1507 mm Frequently Asked Questions about 56.3*77.25 Tapered Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Beyond standard alloy steel, CHG Bearing can customize the 56.3*77.25 Tapered 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.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 56.3*77.25 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.
When fitting 56.3*77.25 over a mm shaft, CHG Bearing strictly recommends uniform induction heating (controlled between 90°C and 110°C) or precision hydraulic press sleeves. Under no circumstances should direct impact blows be struck against the rings or cage, as shock loads cause brinelling indents and premature spalling.
Standard batches of CHG Bearing 56.3*77.25 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.
