System of Measurement System of Measurement |
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Diameter Diameter | Hide |
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Appearance Appearance |
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Shape Shape |
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Hardness Hardness |
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Yield Strength Yield Strength |
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Heat Treatment Heat Treatment |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Minimum Temperature Minimum Temperature |
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Maximum Temperature Maximum Temperature |
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Color Color |
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Specifications Met Specifications Met |
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Fabrication Fabrication |
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For Use With For Use With |
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Heat Treatable Heat Treatable |
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Friction Rating Friction Rating |
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Tensile Strength Tensile Strength |
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About Plastic
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About Stainless Steel
More
About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron
More
Hardened Bearing-Quality 440C Stainless Steel
- Yield Strength: Not Rated
- Hardness: Rockwell C60 (Very Hard)
- Heat Treatment: Hardened
- Specifications Met: SAE AMS5630
These balls are hardened for increased wear and abrasion resistance. 440C is one of the hardest types of stainless steel after heat treating. It's often used for bearings and valves. This material maintains its corrosion resistance in temperatures up to 800° F.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.
| Dia. | Dia. Tolerance | Magnetic Properties | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 4mm | -0.0025mm to 0.0025mm | Magnetic | 50 | 0000000 | 00000 |
Corrosion-Resistant 316 Stainless Steel
The addition of molybdenum gives 316 stainless steel excellent corrosion resistance. Use it in a variety of marine and chemical-processing applications. It maintains its corrosion resistance up to the maximum temperature.
Balls have a reflective, mirror-like finish.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.
- Yield Strength: Not Rated
- Hardness:
Inch Sizes: Rockwell B90 (Medium)
Metric Sizes: Rockwell C25 (Hard) - Heat Treatment: Not Rated
- Heat Treatable: No
- Specifications Met: Not Rated
| Dia. | Dia. Tolerance | Appearance | Max. Temp., °F | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||
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Metric | ||||||
| 4mm | -0.013mm to 0.013mm | Mirror-Like | 1110° | 50 | 00000000 | 00000 |
Tight-Tolerance Multipurpose 304 Stainless Steel
This material has tighter tolerances than standard 304 stainless steel. From cookware to chemical-processing equipment, 304 stainless steel is a good all-around choice for a wide range of applications. It maintains its corrosion resistance in temperatures up to 1500° F.
Balls have a reflective, mirror-like finish.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.
- Yield Strength: Not Rated
- Hardness: Rockwell C25 (Hard)
- Heat Treatable: No
| Dia. | Dia. Tolerance | Fabrication | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 4mm | -0.0127mm to 0.0127mm | Cold Worked | 50 | 0000000 | 00000 |
Hard Wear-Resistant 52100 Alloy Steel Balls
- Yield Strength: 295,000 psi
- Hardness: Rockwell C60 (Very Hard)
- Specifications Met: See table
Also known as chrome steel, 52100 is an extremely hard and wear-resistant material. These balls are often used in bearings.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ACTIVITY after your order ships.
| Dia. | Dia. Tolerance | Heat Treatment | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 4mm | -0.0025mm to 0.0025mm | Hardened | 100 | 0000000 | 00000 |
Ultra-Hard C2 Tungsten Carbide Balls
- Yield Strength: Not Rated
- Hardness: Rockwell C75 (Very Hard)
- Temper Rating: Not Rated
Tungsten carbide, sometimes called carbide, is harder than Corrosion-Resistant Tungsten with excellent wear resistance. Use it to machine long-lasting tools, such as end mills and inserts.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Mechanical Finish | Pkg. Qty. | Pkg. | |
| 4mm | -0.0025mm to 0.0025mm | Polished | 2 | 0000000 | 00000 |
Wear-Resistant Easy-to-Machine Delrin® Acetal Resin Balls
- Color: White
- Temperature Range: -20° to 180° F
- Tensile Strength: 10,000-11,000 psi (Good)
- Impact Strength: 1-1.5 ft.-lbs./in. (Poor)
- Hardness: Rockwell R120-R122 (Hard)
- For Use Outdoors: No
- Specifications Met: FDA Compliant 21 CFR 177.2480
Able to hold tight tolerances, these balls resist expanding when exposed to heat and moisture. They have a naturally slippery, wear-resistant surface. Use them for bearings and low-load rolling applications. Delrin® acetal resin is also known as acetal homopolymer.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Pkg. Qty. | Pkg. | |
Metric | ||||
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| 4mm | -0.0254mm to 0.0254mm | 100 | 0000000 | 00000 |
Nonporous Alumina Ceramic Balls
- Color: White
- Max. Temperature: 2000° F
- Fabrication: Fired
- Porosity: 0%
- Compressive Strength: 300,000 psi
Seal out air and gas in high-temperature and high-wear applications. This ultrahard ceramic can also be used in applications that require superior strength.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Sphericity | Each | |
| 4mm | -0.0001" to 0.0001" | 99.99% | 0000000 | 00000 |
High-Strength Fracture- and Wear-Resistant Zirconia Ceramic Balls
- Color: White
- Temperature Range: See table
- Fabrication: Sintered
- Porosity: See table
- Compressive Strength: See table
This zirconia ceramic contains yttria for compressive strength, so it won’t crack or lose shape when pushed together. Used to bear loads, it’s the strongest ceramic at room temperature. It’s crack tolerant, meaning if it does crack it won’t shatter and will still carry loads safely. Because it’s wear resistant, it also works well in bearings and valves. This material insulates heat well, but won’t withstand temperature shifts as well as ceramics such as alumina and silicon nitride. It has excellent heat and corrosion resistance, though may corrode from hydrofluoric and sulfuric acid.
For technical drawings and 3-D models, click on a part number.
| Diameter | Diameter Tolerance | Minimum Temperature | Maximum Temperature | Compressive Strength, psi | Porosity | Pkg. Qty. | Pkg. | |
| 4mm | -0.00250mm to 0.00250mm | -112° F | 2700° F | 350,000 | 0% | 5 | 0000000 | 000000 |
Mirror-Finish Polishing Media for Steel, Stainless Steel, and Hard Metals
Often used as the final step after other media, this type of media is also good for use on fragile parts and won't contaminate nonferrous materials. Choose a size that’s large enough not to lodge in recesses and holes. Use with liquid compounds in tumbling and vibrating machines.
5 lbs. | ||||||
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| Dia., mm | Density, lbs./cu. ft. | Recommended Media to Parts Ratio | For Finish | Material | Pkg. | |
Ball | ||||||
| 4 | 125 | 3:1 | Mirror | Porcelain | 0000000 | 000000 |