Four Point Contact Ball Bearings
Our Four Point Contact Ball Bearings meet the demands for bidirectional axial load capacity and stable high-speed performance. With over 20 years of manufacturing experience, our bearings are widely used in wind power, motors, and automation systems. Our products feature low vibration, long service life, and we provide reliable factory-direct service to OEM customers worldwide. We offer OEM customization, wholesale pricing, and fast global shipping.
As a real manufacturer with long-term production experience, we developed our Four Point Contact Ball Bearings to solve practical engineering challenges such as limited installation space, unstable axial load handling, and premature wear in continuous operation.
Each model is validated through real factory testing and long-term customer feedback from industrial applications. The focus is simple: stable performance in real machines, not just catalog data.
Technical Parameters
| Bearing Model | Bore Diameter (d) | Outer Diameter (D) | Width (B) | Dynamic Load Rating (Cᵣ) (kN) | Static Load Rating (C₀ᵣ) (kN) | Max Speed (rpm) | Weight (kg/lb) |
| QJ 206 MA | 30 | 62 | 16 | 20.5 | 12.5 | 14000 | 0.2 |
| QJ 207 MA | 35 | 72 | 17 | 25.5 | 15.5 | 13000 | 0.23 |
| QJ 208 MA | 40 | 80 | 18 | 30.5 | 18.5 | 12000 | 0.26 |
| QJ 209 MA | 45 | 85 | 19 | 35.5 | 21.5 | 11000 | 0.29 |
| QJ 210 MA | 50 | 90 | 20 | 40.5 | 24.5 | 10000 | 0.32 |
| 7000A | 10 | 26 | 8 | 4 | 2.5 | 20000 | 0.05 |
| 7001A | 12 | 28 | 8 | 4.5 | 3 | 19000 | 0.06 |
| 7002A | 15 | 32 | 9 | 5.5 | 3.5 | 18000 | 0.07 |
| 7003A | 17 | 35 | 10 | 6.5 | 4 | 17000 | 0.09 |
| 7004A | 20 | 42 | 12 | 8 | 5 | 16000 | 0.12 |
| 7005A | 25 | 47 | 14 | 10 | 6.5 | 15000 | 0.14 |
| 7006A | 30 | 55 | 16 | 12 | 8 | 14000 | 0.17 |
| 7007A | 35 | 62 | 17 | 14 | 9.5 | 13000 | 0.2 |
| 7008A | 40 | 68 | 18 | 16 | 11 | 12000 | 0.23 |
| 7009A | 45 | 72 | 19 | 18 | 12.5 | 11000 | 0.26 |
| 7010A | 55 | 90 | 22 | 20 | 14 | 10000 | 0.29 |
| 7011A | 60 | 100 | 23 | 5 | 3.5 | 20000 | 0.08 |
| 7012A | 65 | 110 | 24 | 6 | 4 | 19000 | 0.09 |
| 7013A | 70 | 120 | 26 | 7 | 4.5 | 18000 | 0.11 |
| 7014A | 10 | 30 | 9 | 8 | 5 | 17000 | 0.13 |
| 7200 | 12 | 32 | 10 | 9 | 5.5 | 16000 | 0.15 |
| 7201 | 15 | 35 | 11 | 5 | 3.5 | 15000 | 0.05 |
| 7202 | 17 | 40 | 12 | 5.5 | 4 | 14000 | 0.06 |
| 7203 | 20 | 47 | 14 | 6.5 | 4.5 | 13000 | 0.07 |
| 7204 | 25 | 52 | 15 | 7.5 | 5 | 12000 | 0.08 |
| 7205 | 30 | 62 | 16 | 9 | 5.5 | 11000 | 0.09 |
| 7206 | 35 | 72 | 17 | 10 | 6 | 10000 | 0.11 |
| 7207 | 40 | 80 | 18 | 12 | 7 | 9500 | 0.12 |
| 7208 | 45 | 85 | 19 | 6 | 4 | 9000 | 0.07 |
| 7209 | 50 | 90 | 20 | 6.5 | 4.5 | 8500 | 0.08 |
| 7210 | 55 | 100 | 22 | 7.5 | 5.5 | 8000 | 0.09 |
| 7211 | 60 | 110 | 24 | 8.5 | 6.5 | 7500 | 0.1 |
| 7212 | 65 | 120 | 26 | 9 | 7 | 7000 | 0.12 |
| 7213 | 10 | 140 | 9 | 10 | 7.5 | 6500 | 0.13 |
| 7214 | 12 | 30 | 10 | 12 | 8 | 6000 | 0.14 |
| 7220 | 15 | 32 | 11 | 14 | 8.5 | 5500 | 0.15 |
| 7221 | 17 | 35 | 12 | 16 | 9.5 | 5000 | 0.17 |
| 7222 | 20 | 40 | 14 | 18 | 10.5 | 4500 | 0.18 |
| 7223 | 25 | 47 | 15 | 20 | 11.5 | 4000 | 0.19 |
| 7224 | 30 | 55 | 16 | 22 | 12.5 | 3500 | 0.2 |
Key Performance Advantages
Through cooperation with OEM customers, we found axial load stability is the most critical factor.
Our design features:
- Precision split inner ring structure
- Optimized four-point contact geometry
- Stable axial load support in both directions
- Strong radial load performance in compact space
Real application benefits reported by customers:
- Reduced vibration at high speed
- Improved load distribution stability
- Longer maintenance intervals in continuous operation
Manufacturing Strength
Every production stage is strictly controlled:
- Vacuum-degassed high-grade bearing steel
- CNC precision grinding for raceway accuracy
- 100% vibration and noise inspection before shipment
- Continuous running tests for every batch
- ISO9001 & IATF16949 quality system compliance
Annual capacity: 100 million bearings for stable global supply.
Technical Features
- Bi-directional axial load capacity
- Compact installation design
- Stable high-speed operation
- Wide temperature adaptability
- Optional brass or polymer cages
- Flexible lubrication options
Applications
Four-point contact ball bearings are widely used in:
- Wind turbine yaw and pitch systems
- Industrial automation equipment
- Packaging machinery
- Pumps, motors, and gear reducers
OEM & Custom Solutions
We support flexible customization:
- Internal clearance adjustment
- High-temperature / food-grade grease options
- Anti-corrosion surface treatment
- Private label & OEM marking
FAQ
Q1: What are the main advantages of Four Point Contact Ball Bearings?
Supports axial loads in both directions within a compact structure.
Q2: Typical applications?
Wind energy, motors, automation systems, pumps, and packaging machinery.
Q3: OEM available?
Yes, full customization support is available.
Q4: How is quality ensured?
Full-process inspection, CNC control, and dynamic testing before shipment.
Q5: Manufacturer or trader?
We are a direct manufacturer established in 2004 with in-house production systems.
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Contact Info
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Address
No.183,Longfeng,West of Zhangting industrial Zone,Yuyao,Ningbo,China
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