Manufactured by CHG Bearing, the 42.1*73 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.
42.1*73 - Tapered Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 42.1*73 |
| Brand | CHG® |
| Product Type | Tapered Roller |
| Taper Angle | 1°52′30″ |
| Dimensions | |
| Roller Length, Lw | 73 mm |
| Center Recess Diameter | 25 mm |
| Through-hole Diameter | - mm |
| Center Recess Depth | 1.2 mm |
| Large-end Diameter, Dw | 42.1 mm |
| Spherical End Radius, SR | 546 mm |
| Through-hole Chamfer | - mm |
| Large-end Diameter Tolerance | -0.015 to +0.015 mm |
| Through-hole Coaxiality | - mm |
| Rolling Surface Roughness, Ra (µm) | 0.16 |
| Axial Chamfer — Large End | 1.5 mm |
| Axial Chamfer Tolerance — Large End | -0.5 to +0.5 mm |
| Radial Chamfer — Large End | 1.5 mm |
| Radial Chamfer Tolerance — Large End | -0.5 to +0.5 mm |
| Axial Chamfer — Small End | 1.5 mm |
| Axial Chamfer Tolerance — Small End | -0.5 to +0.5 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) | 0.2 µm |
| Dimensional & Geometrical Accuracy | |
| Roller Length Tolerance | -0.5 to 0 mm |
| End-face Runout | - mm |
| Diameter Variation Between Ends | ±0.0035 mm |
| Roundness | 0.003 mm |
| Ovality | 0.003 mm |
42.1*73 42.1 mm 73 mm 546 mm Frequently Asked Questions about 42.1*73 Tapered Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
When fitting 42.1*73 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.
In its sealed configuration (Open Type), CHG Bearing pre-charges 42.1*73 with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
For international ocean and air freight, CHG Bearing packs 42.1*73 with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 42.1*73. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
