B30-216 Open Wide OD CVT Primary Pulley Thick Wall Deep Groove Bearing

1. Product Overview

B30-216 non-standard single-row open deep groove ball bearing, overall dimension 30mm inner bore × 78mm outer diameter × 16mm width, fully interchangeable with original NSK B30-216, matched for domestic vehicle CVT primary drive pulley medium torque transmission system. Open design without rubber sealing rings, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance, C3 clearance customizable on demand. It bears composite radial load and slight bidirectional axial load, runs quiet and stable under long-term high-speed variable torque vibration 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 B30-216 assembly standards. Complete formal quotation will be provided within 24 hours upon inquiry.

2. Key Advantages

• Open through-hole structure allows full circulation of CVT transmission oil for continuous efficient heat dissipation, completely avoids rubber seal aging, swelling and oil leakage failures under long-time high-temperature oil soaking
• Super-finished ultra-smooth deep groove raceway greatly reduces rolling friction coefficient, less heat accumulation during high-speed operation, stable smooth rotation under frequent torque fluctuation of primary pulley
• Thick-wall integrated inner and outer rings with high-hardness GCr15 material deliver outstanding wear resistance and anti-fatigue performance, effectively extend the whole service life of CVT transmission
• OEM unified overall installation dimensions, direct plug-and-play replacement without modifying pulley housing, primary drive shaft and matched installation accessories
• Optimized lightweight stamped steel cage reduces rotation inertia, perfectly adapts to long-term continuous medium-load high-speed working conditions of CVT variable transmission
• Standard P0 precision grade, P6 accuracy and C3 internal clearance can be customized to meet domestic auto OEM assembly matching requirements
• Stable mass production with sufficient stock supply, high cost performance for auto repair aftermarket and bulk OEM supporting orders

3. Applications

Domestic compact passenger car CVT primary drive pulley assemblies, automatic transmission differential medium torque shafts, light commercial vehicle medium load reducers, medium agricultural machinery transmission core moving load-bearing components.

4. Technical Specifications

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 B30-216 bearings pass multi-process strict factory inspection.

7. CTA

Send bulk inquiry for B30-216 open medium load CVT primary pulley 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: What is the difference between open B30-216 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.

Q2: Can B30-216 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; high-speed anti-wear gear grease can be filled if used for independent separate assembly.