Manufactured by CHG Bearing, the 70*139.497 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.
70*139.497 - Tapered Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 70*139.497 |
| Brand | CHG® |
| Product Type | Tapered Roller |
| Taper Angle | 0°32′50″ |
| Dimensions | |
| Roller Length, Lw | 139.497 mm |
| Center Recess Diameter | - mm |
| Through-hole Diameter | 18 mm |
| Center Recess Depth | - mm |
| Large-end Diameter, Dw | 70 mm |
| Spherical End Radius, SR | 3115 mm |
| Through-hole Chamfer | 13 mm |
| Large-end Diameter Tolerance | -0.015 to +0.015 mm |
| Through-hole Coaxiality | 0.1 mm |
| Rolling Surface Roughness, Ra (µm) | 0.16 |
| Axial Chamfer — Large End | 2 mm |
| Axial Chamfer Tolerance — Large End | -0.5 to +0.5 mm |
| Radial Chamfer — Large End | 2 mm |
| Radial Chamfer Tolerance — Large End | -0.5 to +0.5 mm |
| Axial Chamfer — Small End | 2 mm |
| Axial Chamfer Tolerance — Small End | -0.5 to +0.5 mm |
| Radial Chamfer — Small End | 2 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 | 0.004 mm |
| Roundness | 0.003 mm |
| Ovality | 0.003 mm |
70*139.497 70 mm 139.497 mm 3115 mm Frequently Asked Questions about 70*139.497 Tapered Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Standard batches of CHG Bearing 70*139.497 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.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 70*139.497. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
Built for demanding industrial environments, the 70*139.497 Tapered Rollers by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
Engineered according to international ISO boundary plans, CHG Bearing supplies 70*139.497 with a precision bore diameter (d) of mm, an outside diameter (D) of mm, and a nominal ring width (B) of mm. This configuration yields an effective cross-sectional wall thickness of 0 mm and an envelope ratio (D/d) of 0, delivering compact rigidity for OEM machinery housings.
