B40-181 Open Non-Standard Auto CVT Intermediate Shaft Deep Groove Bearing

B40-181 non-standard single-row open deep groove ball bearing, overall dimension 40mm inner bore × 72mm outer diameter × 17mm width, interchangeable with original NSK B40-181 and equivalent model DG407217, widely matched to Japanese passenger car CVT intermediate auxiliary shaft and small differential assemblies. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance, C3 clearance customizable. It bears composite radial load and slight bidirectional axial load, runs low-noise and stable 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 B40-181 assembly requirements. Complete formal quotation will be provided within 24 hours upon inquiry.

• Open through structure enables full circulation of CVT transmission fluid, excellent continuous heat dissipation, eliminates aging, swelling and oil leakage defects of rubber seals under long-term high-temperature oil immersion
• Superfinished ultra-smooth deep groove raceway reduces rolling friction coefficient, maintains steady continuous rotation under frequent shifting torque impact, less heat accumulation during high-speed operation
• Uniform high-hardness GCr15 inner and outer rings deliver outstanding wear resistance and anti-fatigue performance, effectively extend the overall service cycle of CVT transmission
• OEM unified overall installation dimensions, direct plug-and-play replacement without modifying transmission housing, intermediate shaft and matching accessories
• Lightweight stamped steel cage lowers rotation inertia, perfectly adapts to long-term continuous medium-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 capacity, sufficient stock supply, cost-effective for auto repair aftermarket and bulk OEM supporting orders

Japanese passenger car CVT transmission intermediate auxiliary shafts, automatic gearbox small differential assemblies, light commercial vehicle mini heavy-load reducers, medium-sized agricultural machinery transmission core moving components.

25+ years professional manufacturer of B 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 transmission 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 B40-181 bearings pass multi-process strict factory inspection.

Send bulk inquiry for B40-181 open CVT intermediate shaft bearings and obtain the following full support:

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

Large-volume OEM cooperation is welcome anytime.

Q1: What is the difference between open B40-181 and rubber sealed bearings?
A1: Open bearing has no rubber sealing lips, installed inside closed CVT housing relying on circulating transmission oil for lubrication and cooling; rubber sealed bearings are used for external exposed dusty shafts with grease independent lubrication.
Q2: Can B40-181 replace original NSK OEM bearings directly?
A2: Yes, inner bore, outer diameter and width dimensions are fully consistent, no modification to transmission shaft components required during replacement.
Q3: Applicable lubrication mode?
A3: Designed for CVT circulating transmission oil lubrication; high-speed anti-wear gear grease can be filled if used for independent separate assembly.