Manufactured by CHG Bearing, the QJF1068MB is a precision Four-Point Contact Ball Bearings. Key dimensional parameters include a 340 mm bore diameter, a 520 mm outer diameter, and a 82 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.
QJF1068MB - Four-Point Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | QJF1068MB |
| Brand | CHG® |
| Construction | Single Row |
| Characteristics | |
| Bearing Type | Four-Point Contact Ball Bearing |
| Series | QJF |
| Load Direction | Combined |
| Dimensions | |
| Bore Diameter (d) | 340 mm |
| Width (B) | 82 mm |
| Outer Diameter (D) | 520 mm |
| Chamfer Dimension r (min.) | 5 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 417 kN |
| Basic Static Load Rating C0 (kN) | 735 kN |
| Material | |
| Mass (kg) | 68.4 kg |
| Cage Material | Brass |
QJF1068MB 520 mm 340 mm 82 mm Frequently Asked Questions about QJF1068MB Four-Point Contact Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Engineered according to international ISO boundary plans, CHG Bearing supplies QJF1068MB with a precision bore diameter (d) of 340 mm, an outside diameter (D) of 520 mm, and a nominal ring width (B) of 82 mm. This configuration yields an effective cross-sectional wall thickness of 90.0 mm and an envelope ratio (D/d) of 1.53, delivering compact rigidity for OEM machinery housings.
Built for demanding industrial environments, the QJF1068MB Four-Point Contact Ball Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
As standard production, CHG Bearing subjects QJF1068MB 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.
The CHG Bearing QJF1068MB 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.
