Double Row Angular Contact Ball Bearings

The 3200 and 5200 series share the same boundary dimensions but differ in internal design. The 3200 series uses a conventional ball complement, while the 5200 series uses a filling slot design that accommodates more balls for increased static load capacity. The same relationship applies between the 3300 and 5300 series. The 3300/5300 heavy-duty series have larger outer diameters and wider cross-sections than the 3200/5200 standard series for a given bore diameter, delivering significantly higher load ratings.

Double row angular contact bearings are pre-assembled with factory-set internal geometry, eliminating the need for on-site preload adjustment. They occupy a single bearing position, reducing axial space requirements and simplifying housing design. For applications that do not require the extreme precision or very high speeds of matched-pair spindle bearings, double row units offer comparable combined load performance with lower installation complexity and cost.

Both types handle combined radial and axial loads, but the angular contact design has asymmetric raceways that produce a defined contact angle. This gives it significantly higher axial load capacity and axial stiffness compared to the symmetric raceway geometry of double row deep groove bearings (4200/4300 series). Choose angular contact when the application demands higher axial rigidity or when the axial-to-radial load ratio is substantial.

Preload is factory-set during assembly. Light, medium, and heavy preload levels are available to match application requirements for rotational accuracy, stiffness, and speed. Higher preload increases rigidity but reduces maximum permissible speed, so the appropriate level depends on the specific operating conditions. Contact our engineering team with your application data for preload recommendations.

Yes. BOM's custom manufacturing capability covers the full spectrum, from non-standard dimensions, alternative ring and ball materials, and specialized coatings to complete bearing architecture redesign including modified raceway geometry and integrated assemblies. Our engineering team works directly with your design requirements to deliver bearings that meet application-specific performance targets. Contact us with your specifications for a detailed proposal.