HTFB31-28 Open Standard Auto Gearbox Deep Groove Bearing

HTFB31-28 non-standard open single row deep groove ball bearing, dimension 31mm bore × 80mm outer diameter × 16.5mm width, standard model of HTFB dedicated transmission series, compatible with Honda automatic gearbox intermediate and differential shafts, corresponding OE numbers 91003-RFK-025 / 91003-RXH-005. Open design without rubber seals, matched stamped low carbon steel cage and C0 standard internal clearance. It bears radial load and minor bidirectional axial load, runs stable and low-noise under long-term high-speed shifting vibration inside transmission housing. Manufactured with fully quenched high-purity GCr15 chrome bearing steel and standard dimensional tolerance, fully interchangeable with original OEM HTFB31-28. Complete formal quotation will be provided within 24 hours upon inquiry.

• Open structure enables full circulation of gearbox transmission oil, outstanding heat dissipation, eliminate rubber seal aging, swelling and 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 impact
• Uniform high-hardness GCr15 raw steel delivers excellent wear resistance and anti-fatigue performance, greatly extend overall service cycle of automobile transmission
• OEM unified matching overall dimension, direct replacement without modifying gearbox housing, shaft and assembly accessories
• Lightweight stamped steel cage lowers rotation inertia, perfectly adapt to medium-high speed continuous working conditions of vehicle transmissions
• Standard P0 precision grade, P6 / C3 clearance customizable to meet Honda OEM assembly matching standards
• Stable mass production supply, cost-effective for aftermarket repair and bulk wholesale orders

Honda series passenger car automatic gearbox intermediate shafts, vehicle differential transmission assemblies, light commercial vehicle reducers, small agricultural machinery transmission components.

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

25+ years professional manufacturer of HTFB 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
• 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 HTFB31-28 bearings pass multi-process strict factory inspection.

Send bulk inquiry for HTFB31-28 open standard 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: Difference between open HTFB31-28 and rubber sealed bearings?
A1: Open structure has no rubber sealing parts, relies on internal gearbox circulating oil for lubrication and heat dissipation, used inside transmission housing; rubber sealed bearings are applied to external exposed shafts with dust and mud, adopting grease lubrication.

Q2: Can HTFB31-28 replace original Honda OEM bearings directly?
A2: Yes, inner bore, outer diameter and width dimensions are fully consistent, no modification to gearbox components required during replacement.

Q3: Applicable lubrication mode?
A3: Designed for gearbox circulating transmission oil lubrication; fill high-speed anti-wear gear grease if used separately for independent assembly.