Manufactured by CHG Bearing, the 68.5*103 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.
68.5*103 - Cylindrical Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 68.5*103 |
| Brand | CHG® |
| Product Type | Cylindrical Roller |
| Dimensions | |
| Roller Diameter, Dw | 68.5 mm |
| Roller Length, Lw | 103 mm |
| Center Recess Diameter | 35 mm |
| Through-hole Diameter | 16 mm |
| Center Recess Depth | 2 mm |
| Dimensional & Geometrical Accuracy | |
| Roller Diameter Tolerance | -0.01-0.003 mm |
| Roller Length Tolerance | -0.02 to -0.01 mm |
| Through-hole Runout | 0.03 mm |
| End-face Runout | 0.015 mm |
| Diameter Variation Between Ends | 0.002 mm |
| Roundness | 0.0015 mm |
| Ovality | 0.0015 mm |
| Surface Finish | |
| Outside Diameter Surface Roughness, Ra (µm) | 0.14 µm |
| End-face Surface Roughness, Ra (µm) | 0.22 µm |
| Chamfer Geometry | |
| Axial Chamfer | 2.5 mm |
| Axial Chamfer Tolerance | -0.2 to +0.2 mm |
| Radial Chamfer | 2.5 mm |
| Radial Chamfer Tolerance | -0.2 to +0.2 mm |
68.5*103 68.5 mm 103 mm Frequently Asked Questions about 68.5*103 Cylindrical Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The CHG Bearing 68.5*103 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.
Each 68.5*103 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.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 68.5*103. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Model 68.5*103 is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore mm) and steep thermal gradients between inner and outer rings.
