Manufactured by CHG Bearing, the BQJ3040RT is a precision Four-Point Contact Ball Bearings. Key dimensional parameters include a 300 mm bore diameter, a 405 mm outer diameter, and a 40 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.
BQJ3040RT - Four-Point Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | BQJ3040RT |
| Brand | CHG® |
| Construction | Single Row |
| Characteristics | |
| Bearing Type | Four-Point Contact Ball Bearing |
| Series | QJ |
| Load Direction | Combined |
| Dimensions | |
| Bore Diameter (d) | 300 mm |
| Width (B) | 40 mm |
| Outer Diameter (D) | 405 mm |
| Chamfer Dimension r (min.) | 3 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 165 kN |
| Basic Static Load Rating C0 (kN) | 255 kN |
| Material | |
| Mass (kg) | 16.7 kg |
| Cage Material | Brass |
BQJ3040RT 405 mm 300 mm 40 mm Frequently Asked Questions about BQJ3040RT 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 BQJ3040RT with a precision bore diameter (d) of 300 mm, an outside diameter (D) of 405 mm, and a nominal ring width (B) of 40 mm. This configuration yields an effective cross-sectional wall thickness of 52.5 mm and an envelope ratio (D/d) of 1.35, delivering compact rigidity for OEM machinery housings.
The CHG Bearing BQJ3040RT 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.
To ensure optimum performance of CHG Bearing BQJ3040RT Four-Point Contact Ball Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 300 mm bore. For the 405 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 BQJ3040RT against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (300 mm x 405 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
