Manufactured by CHG Bearing, the 4938X3D is a precision Double Row Angular Contact Ball Bearings. Key dimensional parameters include a 190 mm bore diameter, a 269.5 mm outer diameter, and a 66 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.
4938X3D - Double Row Angular Contact Ball Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | 4938X3D |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Double Row Angular Contact Ball Bearing |
| Number of Rows | Double Row |
| Load Direction | Combined |
| Dimensions | |
| Bore Diameter (d) | 190 mm |
| Width (B) | 66 mm |
| Outer Diameter (D) | 269.5 mm |
| Minimum Chamfer Dimension rmin | 1 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 227 kN |
| Basic Static Load Rating C0 (kN) | 644 kN |
| Material | |
| Mass (kg) | 12.66 kg |
| Cage Material | Brass |
4938X3D 269.5 mm 190 mm 66 mm Frequently Asked Questions about 4938X3D Double Row Angular Contact Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
In its sealed configuration (Open Type), CHG Bearing pre-charges 4938X3D with premium wide-temperature lithium-complex or polyurea grease, calibrated to a 30%–35% cavity volume ratio. For open-type variants, synthetic PAO or refined mineral lubricating oils with appropriate EP (Extreme Pressure) additives should be circulated.
Yes, CHG Bearing works closely with industrial OEMs and brand distributors. We offer turnkey custom engineering for 4938X3D, including laser-etched customer logos, custom internal radial clearances, specialized grease formulations, and bespoke protective packaging.
Each 4938X3D produced in CHG Bearing manufacturing facilities features accurately profiled corner chamfers complying with DIN 5412 / ISO standard corner radii. When designing mating shafts and housing shoulders, machining an undercut or fillet radius strictly within the inner ring clearance limit (190 mm bore side) ensures perfect planar contact without edge binding.
The CHG Bearing 4938X3D 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.
