Precision Ball Bearings
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Silicon Nitride Si3N4 Bearing Balls

Silicon Nitride (Si3N4) ceramic balls are formed from a modern material suitable for applications where high speeds and extreme temperatures are factors. The need for extended life and minimal lubrication make this material ideal for demanding applications. Silicon Nitride is not porous, magnetic, or corrosive and is lighter and harder than steel when manufactured as a ball. Because ceramic balls are non-porous they are virtually friction-less which allow the ability to spin faster than steel balls.

The balls below are organized from the smallest to largest diameter.  You can also use the search feature to quickly find the sizes needed (e.g., 3/8, 7mm, etc...)