B58-1 Open Flanged Deep Groove Auto Gearbox Bearing

B58-1 non-standard open deep groove ball bearing, dimension 58×104×21mm with outer positioning flange, specially used for automobile gearbox and transfer case assemblies. Open design without rubber seals, matched stamped steel cage, C0 standard clearance and optional C3 clearance. It bears radial load and minor bidirectional axial load, runs stably and quietly at high speed under frequent shift vibration. Made of fully quenched GCr15 steel with precise dimensional tolerance, fully interchangeable with original B58-1. Quotation will be provided within 24 hours after inquiry.

• Open design ensures smooth gear oil circulation and great heat dissipation, free from rubber seal aging under high temperature oil soaking
• Integrated outer flange serves as axial stop, simplifies assembly without extra retaining rings
• Low-friction deep groove raceway, stable operation under continuous shifting impact
• High-hardness GCr15 steel delivers excellent wear and fatigue resistance to lengthen transmission service life
• Matches original equipment dimensions, direct replacement without modifying housings or shafts
• Light stamped steel cage reduces rotation inertia, suitable for continuous medium-high speed transmission
• Standard P0 precision, customizable P6/C3 clearance to meet OEM assembly standards

Auto gearbox intermediate shafts, vehicle transfer case assemblies, light commercial vehicle reducers, medium-speed agricultural machinery transmission parts.

25+ years professional maker of non-standard flanged vehicle and tractor gearbox bearings. All units pass high-speed rotation, shock load and fatigue durability tests before delivery. Custom anti-rust coating and high-temperature gearbox grease filling available. Fast quotation and one-on-one installation technical support within 24h for all RFQs. Stable mass production satisfies bulk OEM and global distributor orders, factory direct price with consistent quality and on-time shipment.

• Raw steel hardness & composition inspection;
• raceway grinding roughness test;
• flange dimensional tolerance inspection;
• open bearing oil circulation aging test;
• vibration high-speed fatigue test;
• full dimension sorting;
• 100% visual inspection before packing;
• random sampling performance test before shipment.

All B58-1 bearings pass multi-step strict inspection.

Send bulk inquiry for B58-1 open flanged transmission bearings and receive:

1. Complete formal quotation within 24 hours
2. Dimension drawings & press-fit installation guidance
3. Custom anti-rust treatment and special lubricant service
4. Exclusive long-term bulk factory wholesale price without middle markup

Large-volume OEM cooperation is welcome anytime.

Q1: What’s the function of outer flange on B58-1?

A1: Flange acts as axial stop, limits bearing moving in housing, saves separate retaining ring parts.

Q2: Difference between open B58-1 and rubber sealed bearings?

A1: Open design has no rubber seals, uses circulating gear oil for lubrication and cooling for internal gearbox positions; sealed bearings apply to external dusty shafts with grease lubrication.

Q3: Direct replacement for original B58-1?

A3: Yes, bore, outer diameter, width and flange sizes are fully consistent, no equipment modification needed.