Manufactured by CHG Bearing, the 67786/67721D is a precision Double Row Tapered Roller Bearings. Key dimensional parameters include a 174.625 mm bore diameter, a 247.65 mm outer diameter, and a 106.363 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.
67786/67721D - Double Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 67786/67721D |
| Brand | CHG® |
| Bearing | Double Row Tapered Roller Bearing |
| Characteristics | |
| Series | 370000 |
| Number of Rows | Double Row |
| Tolerance Class | Class 4 |
| Dimensions | |
| Bore Diameter (d) | 174.625 mm |
| Width (B) | 106.363 mm |
| Outer Diameter (D) | 247.65 mm |
| Bore Diameter Tolerance | 0 – +0.025 mm |
| Outside Diameter Tolerance | 0 – +0.051 mm |
| Inner Ring Chamfer | 6 min mm |
| Outer Ring Chamfer | 5 min mm |
| Inner Ring Assembly Width Tolerance | -0.15 – +0.15 mm |
| Outer Ring Assembly Width | 177.8 mm |
| Outer Ring Assembly Width Tolerance | -0.10 – +0.20 mm |
| Shaft Abutment Diameter | N/A mm |
| Housing Abutment Diameter | N/A mm |
| Lubrication Hole Diameter | 10 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 2120 kN |
| Basic Static Load Rating C0 (kN) | 4020 kN |
| Material | |
| Mass (kg) | 137 kg |
| Ring Material | Case-Hardened Steel |
| Cage Material | 08Al Steel / Grade 10 Steel |
| Lubrication Groove Width | 41.8 mm |
| Roller Material | Case-Hardened Steel |
67786/67721D 247.65 mm 174.625 mm 106.363 mm Frequently Asked Questions about 67786/67721D Double Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
The CHG Bearing 67786/67721D 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.
Sourcing 67786/67721D 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 Double Row Tapered Roller Bearings.
To safeguard CHG Bearing 67786/67721D against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (174.625 mm x 247.65 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
Model 67786/67721D is manufactured by CHG Bearing in standard Normal clearance (CN) for ambient temperature transmission, and C3 or C4 clearance for heavy duty applications. C3 clearance compensates for radial shrinkage caused by tight shaft press-fits (bore 174.625 mm) and steep thermal gradients between inner and outer rings.
