Manufactured by CHG Bearing, the 28.5*30.68 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.
28.5*30.68 - Tapered Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 28.5*30.68 |
| Brand | CHG® |
| Product Type | Tapered Roller |
| Taper Angle | 1°29' |
| Dimensions | |
| Roller Length, Lw | 30.68 mm |
| Center Recess Diameter | 16 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 1 mm |
| Large-end Diameter, Dw | 28.5 mm |
| Spherical End Radius, SR | 522 mm |
| Through-hole Chamfer | - mm |
| Large-end Diameter Tolerance | -0.012 to +0.02 mm |
| Through-hole Coaxiality | - mm |
| Rolling Surface Roughness, Ra (µm) | 0.16 |
| Axial Chamfer — Large End | 1 mm |
| Axial Chamfer Tolerance — Large End | -0.4 to +0.4 mm |
| Radial Chamfer — Large End | 0.8 mm |
| Radial Chamfer Tolerance — Large End | -0.3 to +0.3 mm |
| Axial Chamfer — Small End | 0.8 mm |
| Axial Chamfer Tolerance — Small End | -0.3 to +0.3 mm |
| Radial Chamfer — Small End | 1 mm |
| Radial Chamfer Tolerance — Small End | -0.4 to +0.4 mm |
| Performance | |
| Spherical End Surface Roughness, Ra (µm) | 0.32 µm |
| Dimensional & Geometrical Accuracy | |
| Roller Length Tolerance | -0.4 to 0 mm |
| End-face Runout | - mm |
| Diameter Variation Between Ends | ±0.004 mm |
| Roundness | 0.0015 mm |
| Ovality | 0.0015 mm |
28.5*30.68 28.5 mm 30.68 mm 522 mm Frequently Asked Questions about 28.5*30.68 Tapered Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To extend the trouble-free lifespan of CHG Bearing 28.5*30.68, preventive maintenance routines should monitor operating housing temperature (normally maintaining below 70°C) and conduct regular vibration FFT analysis to identify early raceway micro-pitting before unexpected line halts occur.
Absolutely. The CHG Bearing 28.5*30.68 Tapered Rollers is a 1:1 direct interchange for renowned brands, matching part numbers: SKF 28.5*30.68, FAG 28.5*30.68, NSK 28.5*30.68. It shares identical envelope boundary dimensions, load capacities, and shaft fits, allowing instant drop-in replacement without retrofitting your machinery.
Following standard ISO 281 fatigue calculation guidelines, the nominal rating life (L10) of CHG Bearing 28.5*30.68 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.
To safeguard CHG Bearing 28.5*30.68 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces ( mm x mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
