Cobalt Alloy Balls
Ball Bearing
Exceptional Wear Resistance, Hardness & Thermal Stability
Atlas Ball and Bearing offers a range of cobalt alloy balls, engineered for extreme environments that demand outstanding wear resistance, hardness, and high-temperature performance. These high-performance materials are widely used in applications where other materials fail due to heat, friction, or corrosion.
Our cobalt alloy balls are ideal for use in:
- Aerospace & aviation
- Nuclear power systems
- High-temperature valves and pumps
- Chemical processing
- Medical instruments
- Oil & gas drilling and production
150
Precision Ball Diameter
Stellite® Alloy Balls
- High Hardness and Wear Resistance for Harsh Environments
Stellite® 20
Excellent resistance to wear, galling, and corrosion. Maintains hardness up to 900°C. Commonly used in hot tooling, nuclear fuel components, and valve seats.
Stellite® 3
One of the hardest and most wear-resistant cobalt alloys. Suitable for severe sliding wear environments. Used in cutting tools and severe-service valve trim.
Stellite® 6
A versatile alloy with a balance of wear and corrosion resistance. Ideal for valve seats, pump components, and steam turbines.
Stellite® 19
Designed for environments requiring superior thermal fatigue resistance. Used in hot tooling, dies, and severe thermal cycling conditions.
Colmonoy® Alloy Balls
- Nickel-Cobalt Alloys for Wear & Corrosion Protection
Colmonoy® 6
Hardfacing alloy with excellent resistance to abrasion, corrosion, and high-temperature oxidation. Commonly used in pump sleeves, mixer blades, and extruder screws.
Manufacturing & Supply
We offer precision-manufactured cobalt alloy balls in diameters ranging from 0.2mm to 150mm, with tight tolerances and full traceability. Whether off-the-shelf or custom-made from client-supplied materials, our production process ensures consistent quality and performance.
Please feel free to rate our products and service or send us your comments by using our form opposite →
Additionally, we offer a bespoke ball manufacturing service, which follows the same process controls and traceability but uses a customer’s own material. For further details, please email us or call +44 (0) 1922 710515.
Applications of Cobalt Alloy Balls
Cobalt alloy balls deliver dependable performance in critical environments including:
- Aerospace – Hot engine components and wear-resistant systems
- Oil & Gas – Downhole tools, valve components, and bearings
- Chemical Processing – Abrasion- and corrosion-resistant pump parts
- Medical – Biocompatible implants and precision surgical tools
- Nuclear – Wear-resistant parts exposed to radiation and heat
- Metalworking – Tooling components, extrusion dies, and cutting elements
Useful terms and definitions
Batch or Lot:
A defined quantity of balls manufactured under conditions presumed to be uniform and which is considered an entity.
Nominal Ball Diameter:
The diameter value that is used for the general identification of a ball size.
Single Ball Diameter:
The distance between two parallel planes tangential to the actual ball surface.
Diameter Tolerance per Batch:
The allowed difference between the smallest measured ball diameter and the largest ball diameter within the same batch or lot quantity.
Sphericity:
A measure of roundness expressed as the difference between the measured roundness of a ball and a theoretically perfectly round ball.
Surface Finish or Roughness:
A measure of the texture of a surface. It is quantified by the vertical deviations of the actual surface from its ideal form. If these deviations are large, the surface is rough; if they are small, the surface is smooth.
Ball Grades
| Grade | Diameter Tolerance per Ball | Sphericity | Diameter Tolerance per Unit Container | Basic Diameter Tolerance | Maximum Surface Roughness Micro | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inch | µ | Inch | µ | Inch | µ | Inch | µ | Inch | µ | |
| 3 | .000003 | 0.076 | .000003 | 0.076 | .000005 | 0.127 | ±.00003 | ± 0.076 | 0.5 | 0.013 |
| More details about Grade 3... | ||||||||||
| 5 | .000005 | 0.127 | .000005 | 0.127 | .00001 | 0.25 | ±.00005 | ± 0.127 | 0.8 | 0.02 |
| More details about Grade 5... | ||||||||||
| 10 | .000010 | 0.25 | .000010 | 0.25 | .00002 | 0.51 | ±.0001 | ± 2.5 | 1.0 | 0.025 |
| More details about Grade 10... | ||||||||||
| 15 | .000015 | 0.38 | .000015 | 0.38 | .00003 | 0.76 | ±.0001 | ± 2.5 | 1.2 | 0.03 |
| More details about Grade 15... | ||||||||||
| 25 | .000025 | 0.63 | .000025 | 0.63 | .00005 | 1.27 | ±.0001 | ± 2.5 | 1.5 | 0.038 |
| More details about Grade 25... | ||||||||||
| 50 | .00005 | 1.27 | .00005 | 1.27 | .0001 | 2.5 | ±.0002 | ± 5 | 3.0 | 0.075 |
| More details about Grade 50... | ||||||||||
| 100 | .0001 | 2.5 | .0001 | 2.5 | .0002 | 5 | ±.0005 | ± 5 | 5.0 | 0.125 |
| More details about Grade 100... | ||||||||||
| 200 | .0002 | 5 | .0002 | 5 | .0004 | 10 | ±.0010 | ± 10 | 8.0 | 0.2 |
| More details about Grade 200... | ||||||||||
| 300 | .0003 | 7.5 | .0003 | 7.5 | .0006 | 15 | ±.0015 | ± 37.5 | N/A | N/A |
| More details about Grade 300... | ||||||||||
| 500 | .0005 | 12.5 | .0005 | 12.5 | .001 | 25 | ±.002 | ± 50 | N/A | N/A |
| More details about Grade 500... | ||||||||||
| 1000 | .001 | 25 | .001 | 25 | .002 | 50 | ±.005 | ± 125 | Not Applicable | Not Applicable |
| More details about Grade 1000... | ||||||||||
| 2000 | .002 | 50 | .002 | 50 | .004 | 100 | ±.005 | ± 125 | N/A | N/A |
| More details about Grade 2000... | ||||||||||
Sample Our Work!
Take the first step towards precision and quality with our expert services. At Atlas Ball & Bearing, we’re committed to delivering top-notch precision balls and rollers for a wide range of industries, including gas, oil, medical, and transportation. Our dedicated team is ready to assist you with custom solutions tailored to your specific needs. Experience the Atlas Ball & Bearing difference now!