Manufactured by CHG Bearing, the 66.5*128.19 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.
66.5*128.19 - Tapered Rollers
Technical Specifications
| Overview | |
|---|---|
| Part Number | 66.5*128.19 |
| Brand | CHG® |
| Product Type | Tapered Roller |
| Taper Angle | 0°33′24″ |
| Dimensions | |
| Roller Length, Lw | 128.19 mm |
| Center Recess Diameter | - mm |
| Through-hole Diameter | 15 mm |
| Center Recess Depth | - mm |
| Large-end Diameter, Dw | 66.5 mm |
| Spherical End Radius, SR | 2909 mm |
| Through-hole Chamfer | 12 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 to +0.5 mm |
| Radial Chamfer — Large End | 2 mm |
| Radial Chamfer Tolerance — Large End | 0 to +0.5 mm |
| Axial Chamfer — Small End | 2 mm |
| Axial Chamfer Tolerance — Small End | 0 to +0.5 mm |
| Radial Chamfer — Small End | 2 mm |
| Radial Chamfer Tolerance — Small End | 0 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 | 0.004 mm |
| Ovality | 0.004 mm |
66.5*128.19 66.5 mm 128.19 mm 2909 mm Frequently Asked Questions about 66.5*128.19 Tapered Rollers
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The CHG Bearing 66.5*128.19 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.
As a primary manufacturer, CHG Bearing supports both trial batch evaluations and container-load supply for 66.5*128.19. Standard catalog sizes are stocked for rapid 3–7 day dispatch, while high-volume OEM production runs typically dispatch within 30–45 days.
When fitting 66.5*128.19 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.
The Open Type engineered for 66.5*128.19 by CHG Bearing utilizes precision non-contact metal shields or reinforced NBR/FKM contact lip seals. This barrier prevents particulate ingress, washdown fluids, and abrasive dust from reaching the raceways while eliminating grease leakage under centrifugal forces.
