RWF30-118 Non-Standard Auto Engine Ball-Roller Integrated Water Pump Bearing

1. Product Overview

RWF30-118 is an integral one-piece ball-roller composite water pump bearing, full model code explanation:

- RWF: Front deep groove ball row + rear cylindrical roller composite integrated structure, higher radial load capacity than double-ball BWF series
- 30: Outer ring outer diameter matching reference dimension
- 118: Total overall length of the integrated spindle assembly
It is fully interchangeable with NSK original RWF30-118, specially customized for water pump rotating spindles of Asian passenger car gasoline engines.
Adopts integral single outer ring with dual-end multi-lip rubber sealing structure. Stamped high-strength steel cage as standard, solid brass cage can be customized as requested; C0 internal clearance is factory default, C3 enlarged clearance is optional for high-temperature heavy-load working scenarios.
This bearing bears heavy radial load and moderate bidirectional axial load, maintaining stable low-vibration running under long-term high-speed rotation and alternating cold-hot coolant circulation inside engine water pump cavity. Produced with fully quenched high-purity GCr15 chrome bearing steel and micron-level strict dimensional tolerance, it supports direct plug-and-play replacement without modifying water pump housing or spindle. Complete formal quotation will be provided within 24 hours upon your inquiry.

2. Key Advantages

1. RWF ball-roller composite design: The rear cylindrical roller row greatly enhances radial load resistance, effectively offsets unbalanced tension generated by water pump fan belts, avoiding premature wear and abnormal running noise
2. Dual-end multi-lip composite rubber sealing structure, featuring anti-coolant leakage, dust and impurity blocking performance, preventing grease failure caused by coolant mixing inside bearing cavity
3. Integral one-piece outer ring with high overall structural rigidity, no separation or deformation during spindle press-fit installation
4. Superfinished smooth ball and roller raceway reduces friction torque and heat accumulation under continuous high-speed engine operation
5. Unified OEM spindle installation dimensions, no structural modification required during water pump maintenance and replacement
6. Internal cavity pre-filled with long-life high-temperature anti-corrosion water pump grease, stable lubrication performance under sustained engine high temperature
7. Standard P0 precision grade, P6 upgraded precision optional; stable mass production and sufficient spot stock, high cost performance for aftermarket repair and bulk OEM engine supporting orders

3. Applications

Water pump spindle assembly for cooling system of Asian passenger car gasoline engines, engine water pump rotating parts of light commercial vehicles, heavy-load rotary shafts of cooling pumps on small construction machinery.

4. Technical Specifications

Model: RWF30-118 Non-Standard Ball-Roller Integrated Water Pump Bearing
Structure: Front deep groove ball row + rear cylindrical roller row, integral single outer ring with extended integrated spindle
Seal Type: Dual-end multi-lip rubber sealed (2RS as standard configuration)
Cage: Stamped high-carbon steel cage (standard), solid brass cage optional
Internal Clearance: C0 standard, C3 optional
Material: GCr15 chrome bearing steel
Working Temperature Range: -30℃ ~ +130℃
Precision Grade: P0 standard, P6 customizable
Cross Reference: RWF30-118, NSK RWF30-118
Dimension drawings and complete technical spec sheets can be offered on demand.

5. Why Choose GQZ Bearing

We are a professional manufacturer with over 25 years of experience specializing in RWF/BWF series auto engine composite water pump bearings. All finished bearings pass continuous high-speed rotation test, coolant circulation anti-leakage aging test and alternating load fatigue durability test before delivery. Custom anti-rust surface coating and dedicated high-temperature anti-corrosion water pump grease filling services are available. We provide one-on-one professional technical guidance for water pump assembly installation and fast formal quotation for all purchase requests. Stable mass production capacity supports long-term large aftermarket and OEM engine supporting orders, factory direct sales price, consistent stable quality and punctual batch delivery.

6. Quality Assurance

Raw GCr15 steel hardness and chemical composition incoming inspection
Superfinishing roughness detection for ball and roller raceways
Long-cycle coolant circulation anti-leakage aging durability test
Alternating radial-axial load fatigue rotation cycle test
Full dimensional tolerance sorting inspection
100% visual appearance and marking check before packaging
Random sampling high-speed & high-temperature performance test before shipment
All RWF30-118 bearings go through multi-process strict factory inspection.

7. CTA

Send bulk inquiry for RWF30-118 heavy-duty ball-roller water pump bearings and get full supports as below:

1. Complete formal detailed quotation within 24 hours
2. Standard dimension drawings and spindle press-fit installation operation guide for water pump
3. Custom anti-rust surface treatment and dedicated high-temperature anti-corrosion water pump grease filling service
4. Exclusive long-term bulk factory wholesale price without intermediate markup
Large-volume OEM engine supporting cooperation is sincerely welcomed.

8. FAQ

Q1: What does each code of RWF30-118 stand for?
A1:

- RWF: Ball-Roller composite integrated water pump bearing structure
- 30: Outer ring outer diameter matching dimension
- 118: Total length of integrated spindle assembly
Q2: What advantages does RWF ball-roller structure have over double-ball BWF bearings?
A2: The rear cylindrical roller row can withstand much larger radial load, suitable for water pumps with obvious fan belt offset tension, delivering longer service life and lower vibration noise.
Q3: Can RWF30-118 directly replace original NSK bearing?
A3: Yes, all spindle mounting dimensions, integral outer ring structure and overall assembly length are completely consistent, no modification to water pump components needed during assembly.