B43-8 Open Non-Standard Toyota CVT Deep Groove Bearing

1. Product Overview

B43-8 (also marked HTF B43-8) non-standard single-row open deep groove ball bearing, overall dimension 43mm inner bore × 87mm outer diameter × 19.5mm width, fully interchangeable with original NSK B43-8, core bearing matched for Toyota K310, K313 series CVT secondary driven pulley. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance. It bears heavy composite radial load and slight bidirectional axial load, runs stable and low-noise under long-term high-speed variable torque 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 B43-8 assembly requirements. Complete formal quotation will be provided within 24 hours upon inquiry.

2. Key Advantages

• 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, low heat generation during high-load operation
• 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, secondary shaft and assembly accessories
• Thickened width structure improves load capacity, lightweight stamped steel cage lowers rotation inertia, perfectly fits continuous high-load 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

3. Applications

Toyota K310, K313 CVT transmission secondary pulley assemblies, passenger car automatic gearbox differential shafts, light commercial vehicle heavy-load reducers, medium agricultural machinery transmission core components.

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 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.

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 B43-8 bearings pass multi-process strict factory inspection.

7. CTA

Send bulk inquiry for B43-8 open CVT transmission bearings and obtain the following full support:

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

Q1: Difference between open B43-8 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 B43-8 replace original NSK OEM bearings directly?
A2: Yes, inner bore, outer diameter and width dimensions are fully consistent, no modification to CVT pulley 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.