Steel balls are spherical components used as rolling mechanisms in rotary motion components such as bearings, tooling, wheels, but there are other use for steel balls such as grinding or burnishing media, toys and more. There are many sizes and gauges used in a variety of applications.
When sourcing steel balls, consider your application and the function you need the ball to perform. Various options are available when creating steel balls and bearing balls, so you will need to consider the size and materials.
Our engineers can provide guidance in selecting the right type of steel balls for your application, including size, materials, and quantities.
Stainless steel and other metal balls are manufactured using the following processes:
Steel balls have hundreds of potential uses. Some of the most common applications include:
|AISI Number||C %||Si %||Mn %||Mo %||P %||S %||Hardness|
|AISI 1008||0.10 Max||0.30 Max||0.50 Max||0.012||0.07 Max||0.06 Max||Case Hardened
|AISI 1015||0.13~0.18||0.10~0.30||0.30~0.60||0.02||0.04max||Case Hardened
|AISI 1045||0.43~0.50||0.10~0.30||0.60~0.90||0.025||0.04 Max||0.05 Max||Through Hardened
HRC 60 Min
|AISI 1086||0.83~0.88||0.10~0.30||0.30~0.70||0.04||0.04 Max||0.04 Max||Through Hardened
HRC 60 Min
3 ~ 1000
Casters, bicycle parts, light-duty bearing, hardware, toy and etc.
|C %||Si %||Mn %||Cr %||Cu %||S %||P %|
|0.90~1.05||0.15~0.35||0.25~0.45||1.35~1.65||0.3 Max||0.03 Max||0.03 Max|
Through hardened, HRC 60 Min. Grade
5~ 1000 grade
Bearing, Ball Screw, Linear motion guide, Automotive parts, Chemical, food processing.
|C %||Si %||Mn %||Cr %||Ni %||Mo %||P %||S %||Character|
|AISI 302||0.15 Max||1.00 Max||2.00 Max||17.0~ 19.0||8.0~ 10.5||0.045 Max||0.03 Max||Slightly
|AISI 304||0.07 Max||1.00 Max||2.00 Max||17.0~ 19.0||8.50~ 10.5||0.045 Max||0.03 Max||Slightly
|AISI 316||0.07 Max||1.00 Max||2.00 Max||16.5~ 18.5||10.5~ 13.5||2000~ 2.50||0.045 Max||0.03 Max||Nonmagnetic
|AISI 420J||0.17~ 0.25||1.00 Max||1.00 Max||12.0~ 14.0||0.045 Max||0.03 Max||Magnetic
48 Min fair
|AISI 430||0.08 max||1.00 Max||1.00 Max||15.5~ 17.5||0.045 Max||0.03 Max||Fair- good
|AISI 440C||0.95~ 1.20||1.00 Max||1.00 Max||16.0~ 18.0||0.40~ 0.80||0.04 Max||0.02 Max||Fair corrosion
Dispenser valve ball, stainless steel bearing, chemical related application
STR Industries manufactures millions of bearing balls. The balls come in many different grades, as defined by the American Bearing Manufacturers Association (ABMA), which defines the precision of balls. Predictable uniformity, or repeatability, in the manufacturing process is crucial to ensuring consistent performance of STR’s bearing balls.
Bearing balls are a type of rolling-element bearing that uses balls to maintain the separation between moving parts. Bearing balls are at the heart of almost every product with a rotating shaft. They are used in bicycles, blenders, washing machines, fans, and many other products.
STR Industries has more than 50 years of experience in the manufacturing of steel ball for large and small projects alike. Our customers are located throughout the United States, Europe, and Asia.
Our TS 16949 certification demonstrates our commitment to quality management and continuous improvement, emphasizing defect prevention in design, development, and production with an added commitment to the reduction of waste in all aspects of production. We offer inspection on 100% of our products. Our pricing is very competitive – on average, our customers save 20-30% on manufacturing costs.
If you are in an industry that uses steel balls or bearing balls, STR Industries has a solution for you. Please contact us with the details of your project.
|Grade||Size Range (inches)|
|3||025" - 3/16"|
|5||.025" - 1 1/2"|
|10||1/32" - 2 1/2"
|16||1/32" - 2 1/2"|
|24||1/32" - 2 1/2"|
|Grade||Size Range (inches)|
|48||1/32" - 2 1/2"|
|100||1/32" - 4 1/2"|
|200||1/32" - 4 1/2"
|1000||1/32" - 4 1/2"|
We can offer balls for any unique applications, such as:
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