B31-10 Open Narrow Non-Standard CVT Mini Auxiliary Shaft Deep Groove Bearing

1. Product Overview

B31-10 non-standard single-row narrow open deep groove ball bearing, overall dimension 31mm inner bore × 50mm outer diameter × 10mm narrow width, interchangeable with original NSK B31-10 and HTFB31-10 equivalent model, widely matched for Japanese CVT tiny control valve shafts and small differential auxiliary assemblies. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance, C3 clearance customizable on demand. It bears light to moderate radial load and slight bidirectional axial load, runs ultra-quiet and stable under long-term continuous high-speed rotation and high-temperature CVT fluid inside sealed transmission housing. Manufactured with fully quenched high-purity GCr15 chrome bearing steel and strict micron-level dimensional tolerance control, fully compatible with OEM B31-10 assembly requirements. Complete formal quotation will be provided within 24 hours upon inquiry.

2. Key Advantages

• Open through structure enables full circulation of CVT transmission oil for continuous efficient heat dissipation, eliminates rubber seal aging, swelling and oil leakage risks under long-term high-temperature oil immersion
• Superfinished smooth deep groove raceway cuts rolling friction loss, maintains steady ultra-high-speed rotation under frequent tiny torque fluctuation of miniature control shafts
• High-hardness integrated thin-wall GCr15 inner and outer rings deliver reliable wear resistance and anti-fatigue performance, effectively extend the overall service life of CVT transmission
• Compact OEM unified installation dimensions, direct plug-and-play replacement without modifying transmission housing, miniature shaft and matched small accessories
• Ultra-light stamped steel cage minimizes rotation inertia, perfectly adapts to long-term stable high-speed working conditions of CVT miniature control components
• Standard P0 precision grade, P6 / C3 clearance customizable to meet mainstream auto OEM assembly matching standards
• Stable mass production with sufficient stock supply, high cost performance for auto repair aftermarket and bulk OEM supporting orders

3. Applications

Japanese passenger car CVT miniature control valve shafts, compact car automatic gearbox tiny auxiliary shafts, light commercial vehicle micro reducers, small precision agricultural machinery transmission moving parts.

4. Technical Specifications

5. Why Choose GQZ Bearing

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 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.

6. Quality Assurance

• 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 B31-10 bearings pass multi-process strict factory inspection.

7. CTA

Send bulk inquiry for B31-10 open narrow CVT miniature control shaft bearings and obtain the following full support:

1. Complete formal detailed quotation within 24 hours
2. Standard dimension drawings & micro 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.

8. FAQ

1. Q1: What is the difference between open B31-10 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 independent grease lubrication.
2. Q2: Can B31-10 replace original NSK OEM bearings directly?
   A2: Yes, inner bore, outer diameter and narrow width dimensions are fully consistent, no modification to CVT miniature shaft components required during replacement.
3. 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.