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 | Material Certificate with Traceable Lot Number |
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About Rubber
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About Plastic
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About Aluminum
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About Stainless Steel
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About Tool Steel
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About Copper, Brass, and Bronze
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About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron
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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 | |||||
|---|---|---|---|---|---|
| 5/16" | -0.0005" to 0.0005" | Magnetic | 50 | 0000000 | 00000 |
Tight-Tolerance Hardened 440C Stainless Steel
With a diameter that’s held to a close tolerance, this material is hardened for increased wear and abrasion resistance. 440C is one of the hardest types of stainless steel after heat treating. This material maintains its corrosion resistance in temperatures up to 800° F.
Balls have a reflective, mirror-like appearance.
For technical drawings and 3-D models, click on a part number.
- Yield Strength: Not Rated
- Hardness: Rockwell C60 (Very Hard)
- Heat Treatment: Hardened
- Specifications Met: AMS 5630
| Dia. | Dia. Tolerance | Magnetic Properties | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 5/16" | -0.0001" to 0.0001" | Magnetic | 50 | 0000000 | 000000 |
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.
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 | |||||
|---|---|---|---|---|---|
| 5/16" | -0.0005" to 0.0005" | Cold Worked | 50 | 0000000 | 000000 |
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.
- Yield Strength: Not Rated
- Hardness: Rockwell B90 (Medium)
- Heat Treatment: Not Rated
- Heat Treatable: No
- Specifications Met: Not Rated
| Dia. | Dia. Tolerance | Mechanical Finish | Appearance | Pkg. Qty. | Pkg. | |
316 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
Inch | ||||||
| 5/16" | -0.001" to 0.001" | Tumbled | Mirror-Like | 25 | 00000000 | 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.
| Dia. | Dia. Tolerance | Heat Treatment | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 5/16" | -0.0001" to 0.0001" | Hardened | 100 | 0000000 | 00000 |
Tight-Tolerance Hard Wear-Resistant
52100 Alloy Steel Balls
- Yield Strength: 295,000psi
- Hardness: Rockwell C60 (Very Hard)
- Specifications Met: ASTM A295
The diameter on these balls is held to a precise tolerance. 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.
| Dia. | Dia. Tolerance | Heat Treatment | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 5/16" | -0.00005" to 0.00005" | Hardened | 2 | 0000000 | 00000 |
Low-Carbon Steel Balls
- Yield Strength: 44,000 psi
- Hardness: Rockwell C60 (Very Hard)
Low-carbon steel offers good machinability with excellent weldability. It's widely used for parts that don’t require high strength, such as spacers.
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 | Mechanical Finish | Pkg. Qty. | Pkg. | |
Mirror-Like | ||||||
|---|---|---|---|---|---|---|
| 5/16" | -0.005" to 0.005" | Case Hardened | Tumbled | 250 | 00000000 | 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. | |
| 5/16" | -0.0001" to 0.0001" | Polished | 2 | 0000000 | 000000 |
260 Brass Balls
- Yield Strength: 57,000 psi
- Hardness: Rockwell B75 (Medium)
- Temper: Not Rated
- Heat Treatable: No
The most formable brass we offer, 260 offers better weldability than 300 series brass but it’s not as machinable. Sometimes called cartridge brass, it's commonly used for ammunition casings, radiator components, and decorative door hardware.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance Range | Mechanical Finish | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 5/16" | -0.001" to 0.001" | Tumbled | 50 | 0000000 | 000000 |
Hollow Corrosion-Resistant 3003 Aluminum Balls
- Yield Strength: Not Rated
- Hardness: Not Rated
- Temper: O (Annealed)
- Fabrication: Cold Rolled
Hollow construction reduces weight and allows these balls to float. They’re widely used in bearings and valves. 3003 aluminum stands up to outdoor use, as well as exposure to chemicals. It offers a good combination of strength, formability, and weldability.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Heat Treatment | Temperature Range, °F | Pkg. Qty. | Pkg. | |
| 5/16" | -0.010" to 0.010" | Annealed (Softened) | -300° to 300° | 10 | 0000000 | 00000 |
Hardened Shock-Resistant S2 Tool Steel
- Yield Strength: 290,000 psi
- Hardness: Rockwell C55 (Very Hard)
- Specifications Met: ASTM A681
This S2 tool steel has been hardened for excellent strength and impact resistance. It has a tough core that resists breaking under shock loads.
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 | Mechanical Finish | Pkg. Qty. | Pkg. | |
Mirror-Like | |||||
|---|---|---|---|---|---|
| 5/16" | -0.001" to 0.001" | Ground and Polished | 100 | 0000000 | 000000 |
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. | |
Inch | ||||
|---|---|---|---|---|
| 5/16" | -0.001" to 0.001" | 100 | 0000000 | 00000 |
Polypropylene Balls
- Color: Semi-Clear White
- Max. Temperature:
Solid Balls: 180° F
Hollow Balls: 220° F - Tensile Strength: 2,900-5,070 psi (Poor)
- Impact Strength: 0.9 ft.-lbs./in. (Poor)
- Hardness: Rockwell R99 (Hard)
- For Use Outdoors: No
- Specifications Met: See table
Resistant to swelling when exposed to water, these balls are often used in laboratory applications.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Pkg. Qty. | Pkg. | |
Solid | ||||
|---|---|---|---|---|
| 5/16" | -0.002" to 0.002" | 250 | 0000000 | 000000 |
Wear-Resistant Nylon Balls
- Color: Off-White
- Temperature Range: Not Rated
- Tensile Strength: 11,200-12,300 psi (Good)
- Impact Strength: 0.6-1.4 ft.-lbs./in. (Poor)
- Hardness: Rockwell R108-R121 (Hard)
- For Use Outdoors: No
Use these nylon 6/6 balls as bearings and in sealing applications. They have a slippery surface that reduces wear caused by friction.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Pkg. Qty. | Pkg. | |
Inch | ||||
|---|---|---|---|---|
| 5/16" | -0.001" to 0.001" | 100 | 0000000 | 000000 |
Chemical-Resistant Slippery PTFE Balls
- Color: White
- Max. Temperature: 500° F
- Tensile Strength: See Table (Poor)
- Impact Strength: 3.5 ft.-lbs./in. (Good)
- Hardness: Durometer 50D-65D (Medium Soft)
- For Use Outdoors: Yes
Offering a nonstick, slippery surface, these PTFE balls are often used as bearings and in ball valves. They offer superior chemical resistance and perform well in extreme temperatures. These balls are also excellent electrical insulators.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Tensile Strength | Pkg.Qty. | Pkg. | |
| 5/16" | -0.002" to 0.002" | 2,000-3,480 psi | 25 | 0000000 | 00000 |
High-Strength Wear-Resistant Torlon PAI Balls
- Color: Green
- Max. Temperature: 450° F
- Tensile Strength: 15,000 psi (Excellent)
- Impact Strength: 2.7 ft.-lbs./in. (Poor)
- Hardness: Rockwell M106 (Extra Hard)
- For Use Outdoors: No
- Specifications Met: UL 94V0
Dimensionally stable and slippery, these balls are often used in high-friction applications, such as nonlubricated rollers and ball bearings.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Pkg. Qty. | Pkg. | |
Inch | ||||
|---|---|---|---|---|
| 5/16" | -0.001" to 0.001" | 25 | 0000000 | 000000 |
Clear Scratch- and UV-Resistant Acrylic Balls
- Color: Clear
- Max. Temperature: 180° F
- Tensile Strength: 9,195-11,030 psi (Good)
- Impact Strength: 0.040 ft.-lbs./in. (Poor)
- Hardness: Rockwell M89-M96 (Hard)
- For Use Outdoors: Yes
- Specifications Met: UL 94HB
A lightweight alternative to glass balls, acrylic balls maintain clarity over time. They are scratch and UV resistant, so they stand up to outdoor use better than polycarbonate.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Pkg. Qty. | Pkg. | |
| 5/16" | -0.002" to 0.002" | 50 | 0000000 | 000000 |
Clear Impact-Resistant Polycarbonate Balls
- Color: Clear
- Temperature Range: 0° to 240° F
- Tensile Strength: 8,900-9,500 psi (Good)
- Impact Strength: 12-18 ft.-lbs./in. (Excellent)
- Hardness: Rockwell R118 (Hard)
- For Use Outdoors: No
Offering excellent impact resistance across a wide temperature range, these polycarbonate balls are only half the weight of glass. This material is comparable to Lexan, Hyzod, Tuffak, and Makrolon.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Pkg. Qty. | Pkg. | |
| 5/16" | -0.001" to 0.001" | 10 | 0000000 | 000000 |
Stud-Mount Ball Transfers
Stainless steel balls offer the most corrosion resistance.
For technical drawings and 3-D models, click on a part number.
| Ball Dia. | Cap., lbs. | Ht. | Dia. | Working Orientation | Thread Size | Stud Lg. | Each | ||
Stainless Steel Ball | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Aluminum Housing | |||||||||
| G | 3/16" | 20 | 1/4" | 5/16" | Ball Up | M2 | 3/32" | 0000000 | 000000 |
High-Strength Multipurpose Neoprene Rubber Balls
- Color: Black
- Temperature Range: 55A balls: 0° to 212° F; 70A balls: -15° to 200° F
- Tensile Strength: 55A balls: 2,000 psi; 70A balls: 3/16" dia. balls: 1,450 psi, all other sizes: 2,100 psi
- For Use Outdoors: Yes
Let these balls bounce inside of vibrating sifters for an effective screen cleaner or use them as seals in pumps and check valves. Neoprene is also called chloroprene. It offers good oil and abrasion resistance.
| Dia. | Dia. Tolerance | Durometer | Specifications Met | Pkg. Qty. | Pkg. | |
| 5/16" | -0.003" to +0.003" | 70A (Hard) | ASTM D2000 BC | 1 | 000000 | 00000 |
Oil-Resistant Buna-N Rubber Balls
- Color: Black
- Temperature Range: -40° to 212° F
- Tensile Strength: 1,800 psi
- For Use Outdoors: No
Use these balls as seals in pumps and check valves or let them bounce inside of vibrating sifters for an effective screen cleaner. Buna-N is also known as nitrile, NBR, and acrylonitrile butadiene. It offers good resistance to petroleum-based oils.
| Dia. | Dia. Tolerance | Durometer | Specifications Met | Each | |
| 5/16" | -0.003" to +0.003" | 70A (Hard) | ASTM D2000 BF, ASTM D2000 BG | 0000000 | 00000 |
Chemical-Resistant Viton® Fluoroelastomer Rubber Balls
- Color: Black
- Temperature Range: 0° to 400° F
- Tensile Strength: 1,500 psi
- For Use Outdoors: Yes
Clean screens in vibrating sifters with the bounce of these balls, or use them as seals in pumps and check valves. Also known as FKM, Viton® fluoroelastomer is for use in harsh environments, such as those involving ethylene glycol and isopropyl alcohol.
| Dia. | Dia. Tolerance | Durometer | Specifications Met | Each | |
| 5/16" | -0.003" to +0.003" | 70A (Hard) | ASTM D2000 HK | 000000 | 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.
| Dia. | Dia. Tolerance | Sphericity | Each | |
| 5/16" | -0.0001" to 0.0001" | 99.9975% | 0000000 | 00000 |
Fracture-Resistant Silicon-Nitride Ceramic
- Color: Black
- Max. Temperature: 1470° F
- Porosity: 0%
- Compressive Strength: 550,000 psi
Often used to create bearings, silicon-nitride ceramic is harder than many types of bearing steel but is lightweight and can be easily polished. It also withstands high temperatures.
For technical drawings and 3-D models, click on a part number.
| Dia. | Dia. Tolerance | Sphericity | Pkg. Qty. | Pkg. | |
| 5/16" | -0.00004" to 0.00005" | 99.9995% | 2 | 0000000 | 000000 |