Ball Bearing Steel Ball
BMT Bearings supplies high-precision Ball Bearing Steel Ball solutions for global bearing distributors, industrial equipment manufacturers, and OEM buyers. Manufactured with strict dimensional control, stable hardness, and smooth surface finishing, our steel balls deliver low noise, long service life, and reliable rotation performance for motors, pumps, automotive systems, and household appliances.
Steel balls are the core rolling elements inside ball bearings. Their precision directly affects bearing noise levels, rotation accuracy, friction performance, and service life.
Since 2004, BMT Bearings has specialized in precision bearing manufacturing and bearing component production. Our Ball Bearing Steel Balls are produced using automated grinding equipment, precision sorting systems, and strict quality inspection procedures to ensure consistent performance for demanding industrial applications.
We supply steel balls for:
Today, BMT products are exported to customers throughout Europe, South America, Southeast Asia, the Middle East, and other international markets.
Technical Parameters
| Diameter | kgsper | No. of balls | Diameter | kgsper | No. of balls |
| inch（mm） | 1000 pcs | per kg | inch | 1000 pcs | per kg |
| 3.175 | 0.131 | 7634 | 14 | 11.18 | 89 |
| 3.5 | 0.175 | 5717 | 14.2875 | 11.9 | 84 |
| 3.9688 | 0.255 | 3922 | 15.0812 | 14 | 71.4 |
| 0.261 | 3831 | 15.875 | 16.3 | 61.3 | |
| 4 | 0.441 | 2268 | 16 | 16.69 | 59.9 |
| 4.7625 | 0.51 | 1961 | 16.6688 | 18.9 | 52.9 |
| 5 | |||||
| 5.1594 | 0.56 | 1786 | 17 | 20.02 | 50 |
| 5.5562 | 0.699 | 1431 | 17.4625 | 21.7 | 46.1 |
| 5.9531 | 0.86 | 1163 | 18.2562 | 24.8 | 40.3 |
| 6 | 0.881 | 1136 | 19 | 27.96 | 35.77 |
| 6.35 | 1.04 | 962 | 19.05 | 28.2 | 35.5 |
| 6.5 | 1.119 | 894 | 19.8438 | 31.9 | 31.4 |
| 6.7469 | 1.25 | 800 | 20.6375 | 35.8 | 27.9 |
| 7.1438 | 1.49 | 671 | 21 | 37.75 | 26.49 |
| 7.9375 | 2.04 | 490 | 21.4313 | 40.1 | 24.9 |
| 2.09 | 478 | 22.225 | 44.8 | 22.3 | |
| 8 | 2.5 | 400 | 23 | 49.59 | 20.17 |
| 8.5 | 2.71 | 369 | 23.0188 | 49.8 | 20.1 |
| 8.7312 | |||||
| 9 | 2.97 | 337 | 23.8125 | 55.1 | 18.2 |
| 9.525 | 3.52 | 284 | 24 | 56.34 | 17.75 |
| 10 | 4.08 | 245 | 24.6063 | 60.8 | 16.5 |
| 10.3188 | 4.48 | 223 | 25 | 63.68 | 15.7 |
| 11 | 5.42 | 185 | 25.4 | 66.8 | 15 |
| 11.1125 | 5.6 | 179 | 26.9875 | 88.5 | 11.3 |
| 11.5 | 6.22 | 161 | 28.575 | 104.5 | 9.56 |
| 11.5094 | 6.22 | 161 | 30.1625 | 127.8 | 7.83 |
| 11.9062 | 6.88 | 145 | 31.75 | 143.8 | 6.96 |
| 12 | 7.04 | 142 | 33.3375 | 164.3 | 6.09 |
| 12.3031 | 7.6 | 132 | 34.925 | 191.7 | 5.22 |
| 12.7 | 8.35 | 120 | 36.5125 | 230 | 4.35 |
| 13.4938 | 10 | 100 | 38.1 | 287.5 | 3.48 |
Technical Parameters – Sample Series
| diameter | Kgs | No. of balls |
| mm | per 1000 pcs | Per kg |
| 3.175 | 0.131 | 7634 |
| 3.5 | 0.175 | 5717 |
| 3.9688 | 0.255 | 3922 |
| 4 | 0.261 | 3831 |
| 4.7625 | 0.441 | 2268 |
| 5 | 0.51 | 1961 |
| 5.1594 | 0.56 | 1786 |
| 5.5562 | 0.699 | 1431 |
| 5.9531 | 0.86 | 1163 |
| 6 | 0.881 | 1136 |
| 6.35 | 1.04 | 962 |
| 6.5 | 1.119 | 894 |
| 6.7469 | 1.25 | 800 |
| 7.1438 | 1.49 | 671 |
| 7.9375 | 2.04 | 490 |
Key Features
High Precision Roundness
Precision grinding and lapping processes provide excellent dimensional consistency and smooth rolling performance.
Benefits
Stable Hardness Performance
Manufactured from high-quality bearing steel and heat-treated under controlled conditions.
Advantages
Low Noise Operation
The smooth surface finish minimizes rolling resistance and contact vibration.
Suitable for:
Consistent Batch Quality
Automated manufacturing and inspection systems ensure uniform quality throughout large production runs.
Ideal for:
Available Materials
| Material | Features | Typical Applications |
|---|---|---|
| Chrome Steel Balls | High hardness and wear resistance | Bearings, motors, automotive parts |
| Stainless Steel Balls | Corrosion resistance | Food equipment, pumps, medical devices |
| Carbon Steel Balls | Cost-effective solution | General industrial applications |
| Customized Materials | Special requirements | OEM projects |
Available Sizes and Precision Grades
We supply both metric and inch steel balls.
Size Range
- Customized small diameter balls
- Standard industrial sizes
- Large diameter bearing balls
Precision Grades
- G10
- G16
- G20
- G40
- G100
- Customized grades available
Custom Services
- Special dimensions
- Custom materials
- OEM packaging
- Private label supply
- Bulk industrial orders
Manufacturing Capability
BMT Bearings operates modern production facilities equipped with:
- Automatic steel ball grinding machines
- Precision lapping systems
- Hardness testing equipment
- Roundness measuring instruments
- Surface roughness testing devices
- Noise and vibration testing systems
Production Capacity
- Annual bearing production exceeding 100 million units
- Stable OEM supply capability
- Fast delivery for global orders
Quality Control System
Quality consistency is critical for bearing performance.
Our manufacturing process follows:
- ISO9001 Quality Management System
- IATF16949 Automotive Quality Standards
Each production batch undergoes:
Raw Material Inspection
Verification of steel composition and material quality.
Dimensional Inspection
Checking diameter tolerance, roundness, and surface finish.
Hardness Testing
Ensuring uniform heat treatment performance.
Final Quality Verification
Sampling inspections before packaging and shipment.
Typical Applications
Ball Bearing Steel Balls are widely used in:
- Electric motors
- Water pumps
- Automotive bearings
- Motorcycle components
- Conveyor rollers
- Agricultural machinery
- Industrial gearboxes
- Robotics equipment
- Automation systems
- Household appliances
Customer Application Case
A motor manufacturer in Southeast Asia upgraded its bearing assemblies using BMT precision steel balls.
After continuous operational testing:
- Motor vibration levels were reduced
- Bearing operating stability improved
- Maintenance frequency decreased
- Equipment service life increased
The customer subsequently expanded annual purchasing volumes for additional production lines.
Packaging and Export Support
To ensure product quality during transportation, we provide:
- Moisture-proof packaging
- Industrial bulk packaging
- OEM branded packaging
- Export documentation support
- Global logistics coordination
Our experienced export team supports distributors, wholesalers, bearing manufacturers, and industrial buyers worldwide.
Why Choose BMT Bearings
20+ Years Manufacturing Experience
Professional bearing and bearing component production since 2004.
Strict Quality Control
ISO9001 and IATF16949 certified production management.
OEM & Custom Manufacturing
Flexible solutions for industrial customers.
Global Export Experience
Serving customers across Europe, Asia, South America, and the Middle East.
Reliable Supply Capacity
Stable production capability for long-term partnerships.
Frequently Asked Questions
What material is used for Ball Bearing Steel Balls?
The most common material is high-carbon chrome bearing steel, which provides excellent hardness, wear resistance, and fatigue strength.
Can you provide stainless steel bearing balls?
Yes. We offer stainless steel, chrome steel, carbon steel, and customized material options.
What precision grades are available?
We can supply G10, G16, G20, G40, G100, and customized grades according to application requirements.
Do you support OEM manufacturing?
Yes. We provide OEM production, custom packaging, and private label solutions.
Can I request samples before placing a bulk order?
Yes. Samples are available for testing and qualification purposes.
Contact BMT Bearings
Looking for a trusted Ball Bearing Steel Ball manufacturer in China?
BMT Bearings provides high-precision steel balls, strict quality control, OEM customization, and reliable global supply backed by over 20 years of bearing manufacturing experience.
Contact us today for pricing, technical consultation, samples, or bulk order support.
Hot Tags: Ball Bearing Steel Ball
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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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