Manufactured by CHG Bearing, the 67791DW/67720/67721D is a precision Four-Row Tapered Roller Bearings. Key dimensional parameters include a 177.8 mm bore diameter, a 247.65 mm outer diameter, and a 192.088 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.
67791DW/67720/67721D - Four-Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 67791DW/67720/67721D |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Four Row Tapered Roller Bearing |
| Number of Rows | Four Row |
| Tolerance Class | Class 4 |
| Dimensions | |
| Bore Diameter (d) | 177.8 mm |
| Width (B) | 192.088 mm |
| Outer Diameter (D) | 247.65 mm |
| Bore Diameter Tolerance | 0 – +0.025 mm |
| Outside Diameter Tolerance | 0 – +0.025 mm |
| Inner Ring Chamfer | 1.6 min mm |
| Outer Ring Chamfer | 3.2 min mm |
| Inner Ring Assembly Width Tolerance | -1.524 – +1.524 mm |
| Outer Ring Assembly Width | 192.088 mm |
| Outer Ring Assembly Width Tolerance | -1.524 – +1.524 mm |
| Shaft Abutment Diameter | 187 mm |
| Housing Abutment Diameter | 228 mm |
| Lubrication Hole Diameter | 8 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 1010 kN |
| Basic Static Load Rating C0 (kN) | 2780 kN |
| Material | |
| Mass (kg) | 27.9 kg |
| Ring Material | Bearing Steel |
| Rolling Element Material | Bearing Steel |
| Cage Material | Grade 10 Steel |
| Lubrication Groove Width | 9.5 mm |
67791DW/67720/67721D 247.65 mm 177.8 mm 192.088 mm Frequently Asked Questions about 67791DW/67720/67721D Four-Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Each 67791DW/67720/67721D 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 (177.8 mm bore side) ensures perfect planar contact without edge binding.
Beyond standard alloy steel, CHG Bearing can customize the 67791DW/67720/67721D Four-Row Tapered Roller Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
Engineered according to international ISO boundary plans, CHG Bearing supplies 67791DW/67720/67721D with a precision bore diameter (d) of 177.8 mm, an outside diameter (D) of 247.65 mm, and a nominal ring width (B) of 192.088 mm. This configuration yields an effective cross-sectional wall thickness of 34.9 mm and an envelope ratio (D/d) of 1.39, delivering compact rigidity for OEM machinery housings.
To safeguard CHG Bearing 67791DW/67720/67721D against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (177.8 mm x 247.65 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
