B75-55.N Open N Groove Auto Gearbox Deep Groove Bearing

B75-55.N non-standard single-row open deep groove ball bearing, overall dimension 75mm inner bore × 110mm outer diameter × 18mm width, upgraded positioning version of base model B75-55. Outer ring machined with precision N circlip groove for axial fixing, open design without rubber seals, equipped with stamped low-carbon steel cage and standard C0 internal clearance. It bears radial load and slight bidirectional axial load, runs low-noise and stable under long-term high-speed shifting vibration inside transmission housing. Manufactured with fully quenched high-purity GCr15 chrome bearing steel and strict dimensional tolerance, fully interchangeable with original OEM B75-55.N. Complete formal quotation will be provided within 24 hours upon inquiry.

• Outer ring built-in N retaining ring groove, directly install circlip for axial limit, simplify assembly structure without extra positioning sleeves
• Open structure enables full circulation of gearbox oil, outstanding heat dissipation, eliminate rubber seal aging, swelling and oil leakage risks under long-time high-temperature oil soaking
• Superfinished deep groove raceway reduces rolling friction coefficient, stable continuous rotation under frequent gear shift and variable-speed torque impact
• Uniform high-hardness GCr15 raw steel delivers excellent wear resistance and anti-fatigue performance, greatly extend whole transmission service cycle
• OEM unified overall installation dimension, direct replacement without modifying gearbox housing, main shaft and matching accessories
• Lightweight stamped steel cage lowers rotation inertia, perfectly adapts to medium-high speed continuous working conditions of vehicle automatic transmissions
• Standard P0 precision grade, P6 / C3 clearance customizable, stable mass production supply for aftermarket repair and bulk OEM supporting orders

Passenger car automatic gearbox main drive shafts, transmission differential assemblies, light commercial vehicle heavy-load reducers, large agricultural machinery transmission core components.

Dimension drawings and technical spec sheets can be provided on request.

25+ years professional manufacturer of B series non-standard automotive gearbox bearings. All finished bearings pass high-speed continuous rotation test, shock load test and long-cycle fatigue durability test before delivery. Support customized anti-rust surface coating and special high-temperature anti-wear gearbox lubricant filling service. One-on-one professional installation technical guidance and formal detailed quotation within 24h for all RFQs. Stable mass production capacity supports long-term bulk aftermarket and OEM orders, factory direct selling price, stable consistent quality and punctual batch delivery.

• Raw GCr15 steel hardness & chemical composition incoming inspection
• High-precision raceway superfinishing roughness detection
• N circlip groove full batch dimensional sorting inspection
• Open bearing gear oil circulation high-temperature aging durability test
• Continuous vibration load rotation fatigue life cycle test
• Full dimension tolerance sorting inspection
• 100% visual appearance marking check before packaging
• Random sampling high-speed performance test before shipment

All B75-55.N bearings pass multi-process strict factory inspection.

Send bulk inquiry for B75-55.N open N groove transmission bearings and obtain the following full support:

1. Complete formal detailed quotation within 24 hours
2. Standard dimension drawings & press-fit installation operation guidance
3. Custom anti-rust surface treatment and special transmission lubricant filling service
4. Exclusive long-term bulk factory wholesale price without intermediate markup

Large-volume OEM cooperation is welcome anytime.

Q1: What does suffix N stand for on B75-55.N?
A1: N represents precision circlip positioning groove machined on bearing outer ring, matched with standard retaining ring to restrict axial movement during installation.

Q2: Difference between B75-55.N and base model B75-55?
A2: B75-55 is plain outer ring without groove; B75-55.N adds N circlip groove for direct axial positioning, no extra limit parts needed.

Q3: Difference between open B75-55.N and rubber sealed bearings?
A3: Open structure has no rubber sealing parts, relies on internal gearbox circulating oil for lubrication and heat dissipation, installed inside transmission housing; rubber sealed bearings are used for external exposed dusty shafts with grease lubrication.