Manufactured by CHG Bearing, the 78FC51290/P5 is a precision Four-Row Cylindrical Roller Bearings. Key dimensional parameters include a 390 mm bore diameter, a 510 mm outer diameter, and a 290 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.
78FC51290/P5 - Four-Row Cylindrical Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 78FC51290/P5 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Four Row Cylindrical Roller Bearing |
| Number of Rows | Four Row |
| Tolerance Class | P5 |
| Dimensions | |
| Bore Diameter (d) | 390 mm |
| Width (B) | 290 mm |
| Outer Diameter (D) | 510 mm |
| Bore Diameter Tolerance | -0.023 – 0 mm |
| Outside Diameter Tolerance | -0.028 – 0 mm |
| Width Tolerance | -0.40 – 0 mm |
| Enveloping Circle Diameter Fw | 422 mm |
| Inner Ring Chamfer | 3 min mm |
| Outer Ring Chamfer | 3 min mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 3340 kN |
| Basic Static Load Rating C0 (kN) | 8320 kN |
| Material | |
| Mass (kg) | 152 kg |
| Ring Material | Bearing Steel / Case-Hardened Steel |
| Rolling Element Material | Bearing Steel / Case-Hardened Steel |
| Cage Material | Brass |
| Lubrication Groove Width | 16 mm |
| Lubrication Holes (qty × Ø mm) | 8 × Ø8 |
78FC51290/P5 510 mm 390 mm 422 mm 290 mm Frequently Asked Questions about 78FC51290/P5 Four-Row Cylindrical Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
As standard production, CHG Bearing subjects 78FC51290/P5 to precision bainite or martensite quenching, offering dimensional stability up to 120°C (248°F). For high-heat processing equipment, CHG Bearing also supplies custom S0 (150°C), S1 (200°C), or S2 (250°C) stabilization heat treatments upon request to prevent residual austenite transformation.
Engineered according to international ISO boundary plans, CHG Bearing supplies 78FC51290/P5 with a precision bore diameter (d) of 390 mm, an outside diameter (D) of 510 mm, and a nominal ring width (B) of 290 mm. This configuration yields an effective cross-sectional wall thickness of 60.0 mm and an envelope ratio (D/d) of 1.31, delivering compact rigidity for OEM machinery housings.
To ensure optimum performance of CHG Bearing 78FC51290/P5 Four-Row Cylindrical Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 390 mm bore. For the 510 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
To safeguard CHG Bearing 78FC51290/P5 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (390 mm x 510 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
