B45-90E Open Deep Groove Auto Transmission Gearbox Bearing

B45-90E non-standard open deep groove ball bearing, dimension 45mm bore × 100mm outer diameter × 21mm width, dedicated to automobile manual and automatic gearbox differential and intermediate shafts. Open design without rubber seals, equipped with stamped steel cage and C0 standard clearance. It bears radial load and minor bidirectional axial load, runs stably and quietly at high speed under frequent gear shifting vibration. Made of fully quenched GCr15 chrome bearing steel with precise dimensional tolerance, fully interchangeable with original B45-90E. Formal quotation will be provided within 24 hours after inquiry.

• Open structure ensures smooth circulation of gearbox oil, excellent heat dissipation, free from rubber seal aging and swelling under long-time high-temperature oil soaking
• Low-friction deep groove raceway, stable continuous operation under shifting impact and long-term transmission vibration
• High-hardness GCr15 steel delivers outstanding wear and fatigue resistance to extend gearbox service life
• OEM matching overall dimension, direct replacement without modifying gearbox housings or shafts
• Light stamped steel cage reduces rotation inertia, fits medium-high speed continuous transmission working conditions
• Standard P0 precision grade, customizable P6 clearance to meet vehicle OEM assembly standards

Auto gearbox differential shafts, tractor transmission assemblies, light commercial vehicle reducers, medium-speed agricultural machinery transmission components.

Dimension drawings and spec sheets available on request.

25+ years professional maker of non-standard open vehicle 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;
• 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 B45-90E bearings pass multi-step strict inspection.

Send bulk inquiry for B45-90E open 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: Difference between open B45-90E 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.

Q2: Direct replacement for original B45-90E?
A2: Yes, bore, outer diameter and width are fully consistent, no equipment modification needed.

Q3: Suitable lubrication method?
A3: Designed for gearbox circulating oil lubrication; fill high-speed anti-wear gear grease if used separately.