BC Precision Archive

Standard Diameter: 3/32″ / .09375 Inches

Metric Diameter: 2.38125mm

Grade: 5

Material: Si3N4 Silicon Nitride

Ball Weight (each): .00081863 Ounces / 0.0232 Grams

Silicon Nitride (Si3N4) Ceramic Balls are formed from a new material suitable for applications where high loads, high speeds and extreme temperatures are factors. Long life and the need for minimal lubrication make this material appropriate for extreme applications. Silicon nitride is a non-porous, non-magentic, non corrosive, and lighter than steel material. Silicone nitride balls are harder than steel allowing them to withstand the most rigorous environments. Ceramic balls are almost friction-less because they are non-porous which gives them the ability to spin faster than steel balls.

Standard Diameter: 1/4″ / .25 Inches

Metric Diameter: 6.35mm

Grade: 25

Material: 440 Stainless Steel

Ball Weight (each): .036897 Ounces / 1.046 Grams

440 stainless steel balls offer the precise geometry and fine surface finish that makes them especially useful for bicycles, casters, drawer slides, door locks and many other applications with the added benefit of corrosion resistance. 440 stainless steel is a high carbon martensitic stainless steel which has high strength, good hardness and wear resistance. This type of stainless is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Unlike some stainless steel, this 400 series metal has a composition which allows it to be attracted to a magnet.