18BSC19 Non-Standard Auto Gearbox Thin Wall Deep Groove Bearing

1. Product Overview

18BSC19 single-row non-standard thin-wall deep groove ball bearing, dedicated size 18mm inner bore × 36mm outer diameter × 9mm width, suffix C stands for optimized internal clearance matching for transmission working conditions. Fully interchangeable with original NSK 18BSC19, widely applied to miniature control shafts inside Asian passenger car automatic gearboxes. Multiple seal types available: open type, ZZ metal shield, 2RS double rubber seal. Adopts stamped low-carbon steel cage, standard C0 clearance as default, C3 clearance customizable on demand. It bears light radial load and slight two-way axial load, runs low-noise and stable under long-time high-speed rotation and high-temperature gear oil environment inside transmission housing. Made of fully quenched high-purity GCr15 bearing steel with strict micron-level dimensional tolerance, supports direct OEM plug-and-play replacement without modifying gearbox housing or micro shaft. Complete formal quotation will be provided within 24 hours upon inquiry.

2. Key Advantages

• Open through-hole design enables full circulation of gearbox oil, continuous high-efficiency heat dissipation, avoids failures such as rubber seal aging, expansion and oil leakage
• Super-finished smooth raceway reduces rolling friction coefficient, less heat accumulation during continuous high-speed operation, stable rotation under frequent tiny torque fluctuation
• Integrated thin-wall high-hardness inner and outer rings with outstanding wear resistance and anti-fatigue performance, effectively extend the whole service life of gearbox
• Unified OEM installation dimensions, no structural modification required during replacement of miniature transmission shafts
• Lightweight stamped steel cage lowers rotation inertia, perfectly adapts to long-term stable high-speed working of gearbox control components
• Standard P0 precision grade, P6 upgraded precision and C3 clearance can be customized to meet different OEM assembly matching requirements
• Stable mass production and sufficient spot stock, high cost performance for aftermarket repair and bulk OEM supporting orders

3. Applications

Asian passenger car automatic gearbox hydraulic control valve micro shafts, transmission auxiliary miniature rotating shafts, light commercial vehicle precision tiny reducers, small agricultural machinery high-speed fine transmission moving parts.

4. Technical Specifications

Dimension drawings and full technical spec sheets available on request.

5. Why Choose GQZ Bearing

25+ years professional manufacturer of BSC/BSW series non-standard miniature transmission bearings. All finished bearings pass high-speed rotation test, low noise vibration test and long-cycle fatigue durability test before delivery. Custom anti-rust coating and high-temperature anti-wear gear grease filling service supported. One-on-one professional transmission installation technical guidance and fast formal quotation for all RFQs. Stable bulk production capacity, factory direct selling price, consistent stable quality and on-time batch delivery.

6. Quality Assurance

• Raw GCr15 steel hardness & chemical composition incoming inspection
• Deep groove raceway superfinishing roughness detection
• High-temperature gear oil circulation aging durability test
• Low noise vibration fatigue rotation cycle test
• Full dimension tolerance sorting inspection
• 100% visual appearance marking check before packaging
• Random high-speed performance sampling test before shipment

All 18BSC19 bearings pass multi-process strict factory inspection.

7. CTA

Inquire bulk 18BSC19 gearbox miniature deep groove bearings to get full support:

1. Complete formal detailed quotation within 24 hours
2. Standard dimension drawings & micro shaft press-fit installation guide
3. Custom anti-rust surface treatment & dedicated high-temperature gear lubricant filling service
4. Exclusive long-term factory wholesale price without intermediate markup

Large-volume OEM cooperation is warmly welcomed.

8. FAQ

Q1: What are the differences between open, ZZ and 2RS versions of 18BSC19?
A1: Open type installed inside gearbox for circulating gear oil lubrication; ZZ metal shield for semi-sealed internal assembly with slight dust; 2RS double rubber seal for external exposed shafts, dustproof and waterproof, pre-filled long-life anti-wear grease.

Q2: Can 18BSC19 replace original NSK bearing directly?
A2: Yes, all mounting dimensions and internal structure are fully consistent, no modification to gearbox components required during assembly.

Q3: Applicable lubrication mode?
A3: Open type designed for gearbox circulating oil lubrication; sealed versions are pre-filled with high-speed gear grease for maintenance-free operation.