Manufactured by CHG Bearing, the 67780/67720D is a precision Double Row Tapered Roller Bearings. Key dimensional parameters include a 165.1 mm bore diameter, a 247.65 mm outer diameter, and a 103.188 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.
67780/67720D - Double Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 67780/67720D |
| Brand | CHG® |
| Bearing | Double Row Tapered Roller Bearing |
| Characteristics | |
| Series | 370000 |
| Number of Rows | Double Row |
| Tolerance Class | Class 4 |
| Dimensions | |
| Bore Diameter (d) | 165.1 mm |
| Width (B) | 103.188 mm |
| Outer Diameter (D) | 247.65 mm |
| Bore Diameter Tolerance | 0 – +0.051 mm |
| Outside Diameter Tolerance | 0 – +0.076 mm |
| Inner Ring Chamfer | 6.4 min mm |
| Outer Ring Chamfer | 3.3 min mm |
| Inner Ring Assembly Width Tolerance | -0.40 – +0.40 mm |
| Outer Ring Assembly Width | 238.125 mm |
| Outer Ring Assembly Width Tolerance | -0.40 – +0.40 mm |
| Shaft Abutment Diameter | 520 mm |
| Housing Abutment Diameter | 630 mm |
| Lubrication Hole Diameter | 15 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 3440 kN |
| Basic Static Load Rating C0 (kN) | 9100 kN |
| Material | |
| Mass (kg) | 292 kg |
| Ring Material | Case-Hardened Steel / Bearing Steel |
| Cage Material | 08Al Steel / Grade 10 Steel |
| Lubrication Groove Width | 22.925 mm |
| Roller Material | Case-Hardened Steel / Bearing Steel |
67780/67720D 247.65 mm 165.1 mm 103.188 mm Frequently Asked Questions about 67780/67720D Double Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies 67780/67720D with a precision bore diameter (d) of 165.1 mm, an outside diameter (D) of 247.65 mm, and a nominal ring width (B) of 103.188 mm. This configuration yields an effective cross-sectional wall thickness of 41.3 mm and an envelope ratio (D/d) of 1.5, delivering compact rigidity for OEM machinery housings.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 67780/67720D, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
To safeguard CHG Bearing 67780/67720D against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (165.1 mm x 247.65 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
To ensure optimum performance of CHG Bearing 67780/67720D Double Row Tapered Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 165.1 mm bore. For the 247.65 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
