B55-60 Open Non-Standard Auto CVT Transmission Deep Groove Bearing

1. Product Overview

B55-60 non-standard single-row open deep groove ball bearing, dimension 55mm inner bore × 90mm outer diameter × 18mm width, dedicated matching CVT intermediate pulley and gearbox auxiliary shaft assemblies. Open design without rubber seals, equipped with stamped low-carbon steel cage and C0 standard internal clearance. It bears heavy radial load and slight two-way axial load, running stable and low-noise under long-time high-speed variable vibration and high-temperature transmission oil environment inside CVT housing. Manufactured with fully quenched high-purity GCr15 chrome bearing steel and strict dimensional tolerance, fully interchangeable with original OEM B55-60. Complete formal quotation will be provided within 24 hours upon inquiry.

2. Key Advantages

• Open structure allows full circulation of CVT oil, excellent heat dissipation, avoids rubber seal aging, swelling and oil leakage under long-term high-temperature oil soaking
• Superfinished raceway reduces rolling friction, maintains smooth continuous rotation under frequent pulley torque impact
• High-hardness integrated GCr15 inner and outer rings deliver outstanding wear resistance and anti-fatigue performance, extend whole CVT service life effectively
• OEM unified installation dimension, direct replacement without modifying pulley housing, shaft and matching accessories
• Lightweight stamped steel cage cuts rotation inertia, adapts to long-term continuous high-speed operation of CVT transmission
• Standard P0 precision grade, P6/C3 clearance customizable to meet auto OEM assembly standards
• Stable mass production output, cost-effective for aftermarket repair and bulk wholesale orders

3. Applications

Passenger car CVT intermediate pulley assemblies, automatic gearbox differential and auxiliary shafts, light commercial vehicle heavy-duty reducers, medium agricultural machinery transmission components.

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 and gearbox bearings. All finished bearings pass high-speed rotation test, shock load test and long-cycle fatigue durability test before delivery. Support customized anti-rust surface coating and special high-temperature CVT lubricant filling service. One-on-one professional 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 B55-60 bearings pass multi-process strict factory inspection.

7. CTA

8. FAQ

Q1: What is the difference between open B55-60 and rubber sealed bearings?
A1: Open bearing has no rubber sealing parts, installed inside CVT housing relying on circulating transmission oil for lubrication and cooling; rubber sealed bearings are used for external exposed dusty shafts with grease lubrication.

Q2: Can B55-60 replace original 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; high-speed anti-wear gear grease can be filled if used for independent separate assembly.