B60-57 Open CVT Primary Shaft Deep Groove Bearing

1. Product Overview

B60-57 non-standard single-row open deep groove ball bearing, dimension 60mm inner bore × 101mm outer diameter × 17.2mm width, fully interchangeable with original NSK B60-57, core large bearing for Nissan JF011E CVT primary pulley/main drive shaft assembly. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance. It bears heavy radial load and slight bidirectional axial load, maintains stable low-noise high-speed rotation under long-term variable torque vibration and high-temperature CVT oil environment inside transmission housing. Produced with fully quenched high-purity GCr15 chrome bearing steel and strict dimensional tolerance control, fully compatible with OEM B60-57 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
• 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, main 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

3. Applications

Nissan JF011E CVT primary drive pulley & main shaft assemblies, Qashqai, X-Trail and other models CVT transmission core components, passenger car automatic gearbox intermediate shafts, light commercial vehicle heavy-load reducers, medium agricultural machinery transmission parts.

4. Technical Specifications

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

5. Why Choose GQZ Bearing

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 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 B60-57 bearings pass multi-process strict factory inspection.

7. CTA

8. FAQ

Q1: What is the difference between B60-57 and B60-57NXUR?

A1: B60-57 is plain outer ring without positioning groove; B60-57NXUR adds NX circlip groove on outer ring for axial limit installation.

Q2: Difference between open B60-57 and rubber sealed bearings?

A2: 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.

Q3: Can B60-57 replace original NSK OEM bearings directly?

A3: Yes, inner bore, outer diameter and width dimensions are fully consistent, no modification to CVT pulley components required during replacement.