Manufactured by CHG Bearing, the 45*74 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.
45*74 - Cylindrical Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 45*74 |
| Brand | CHG® |
| Product Type | Cylindrical Roller |
| Dimensions | |
| Roller Diameter, Dw | 45 mm |
| Roller Length, Lw | 74 mm |
| Center Recess Diameter | 20 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 2 mm |
| Dimensional & Geometrical Accuracy | |
| Roller Diameter Tolerance | -0.02 to +0.006 mm |
| Roller Length Tolerance | -0.3 to 0 mm |
| Through-hole Runout | - mm |
| End-face Runout | 0.02 mm |
| Diameter Variation Between Ends | 0.002 mm |
| Roundness | 0.0015 mm |
| Ovality | - mm |
| Surface Finish | |
| Outside Diameter Surface Roughness, Ra (µm) | 0.16 µm |
| End-face Surface Roughness, Ra (µm) | 0.25 µm |
| Chamfer Geometry | |
| Axial Chamfer | 1.5 mm |
| Axial Chamfer Tolerance | -0.5 to +0.5 mm |
| Radial Chamfer | 1.5 mm |
| Radial Chamfer Tolerance | -0.5 to +0.5 mm |
45*74 45 mm 74 mm Frequently Asked Questions about 45*74 Cylindrical Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
When fitting 45*74 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.
To ensure optimum performance of CHG Bearing 45*74 Cylindrical 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.
To extend the trouble-free lifespan of CHG Bearing 45*74, 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.
Sourcing 45*74 directly from CHG Bearing eliminates intermediate brokerage markups while granting you factory-direct engineering backup, rigorous ISO-certified quality assurance, competitive volume wholesale pricing, and dependable supply chain stability for Cylindrical Rollers.
