precision manufactured sapphire balls
Precision manufactured sapphire balls are inventoried in a wide variety of sizes. These spheres are manufactured to A.F.B.M.A. Grade 25 standards and are also available in Ruby for enhanced visibility. The basic diameter tolerance is +/- 0.0001″ with a tolerance of 0.00005″ on spheres from the same lot. Series MSB spheres can also be ground and polished in half or to a specific diameter and center thickness to make an inexpensive plano-convex lens. Most sizes below are in inventory. Other sizes can be special ordered.