B45-108 Open Non-Standard Auto CVT Gearbox Deep Groove Bearing

B45-108 non-standard single-row open deep groove ball bearing, dimension 45mm inner bore × 90mm outer diameter × 17mm width, also marked as HTF B45-108, fully interchangeable with original NSK B45-108 transmission bearing. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance. It bears composite radial load and slight bidirectional axial load, runs stably and low-noise under long-term high-speed variable vibration and high-temperature CVT oil environment inside transmission housing. Manufactured with fully quenched high-purity GCr15 chrome bearing steel and strict dimensional tolerance control, fully compatible with OEM B45-108 assembly requirements. Complete formal quotation will be provided within 24 hours upon inquiry.

• Open structure enables full circulation of CVT transmission oil, outstanding heat dissipation performance, eliminates aging, swelling and leakage risks of rubber seals under long-time high-temperature oil soaking
• Superfinished deep groove raceway reduces rolling friction coefficient, stable continuous rotation under frequent pulley variable-speed torque impact
• Uniform high-hardness GCr15 raw steel delivers outstanding wear resistance and anti-fatigue performance, effectively extend whole CVT service cycle
• OEM unified matching overall dimension, direct replacement without modifying pulley housing, intermediate shaft and assembly accessories
• Lightweight stamped steel cage lowers rotation inertia, perfectly fits continuous high-speed working conditions of CVT variable transmission
• Standard P0 precision grade, P6 / C3 clearance customizable to meet mainstream auto OEM assembly matching standards
• Stable mass production supply, cost-effective for auto repair aftermarket and bulk OEM supporting orders

Nissan series CVT transmission intermediate shafts, automatic gearbox differential assemblies, light commercial vehicle heavy-load reducers, medium agricultural machinery transmission core components.

25+ years professional manufacturer of B & HTFB series non-standard CVT & 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 CVT lubricant filling service. One-on-one professional pulley 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 CVT 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 B45-108 bearings pass multi-process strict factory inspection.

Q1: Difference between open B45-108 and rubber sealed bearings?

A1: Open structure has no rubber sealing parts, relies on internal CVT circulating oil for lubrication and heat dissipation, installed inside transmission housing; rubber sealed bearings are used for external exposed dusty shafts with grease lubrication.

Q2: Can B45-108 replace original NSK OEM bearings directly?

A2: Yes, inner bore, outer diameter and width dimensions are fully consistent, no modification to CVT components required during replacement.

Q3: Applicable lubrication mode?

A3: Designed for CVT circulating transmission oil lubrication; fill high-speed anti-wear gear grease if used separately for independent assembly.