Our customer required several machines to grind the internal bore of minature collets used for drilling in the production of printed circuit boards. The collet and drill rotates at 500,000 rpm so concentricity is vital, an off the shelf machine was not available.

Our customer wanted to grind a radius and multi chamfer on PCD (man made diamond) We were told by the customer that three other companies had tried to produce a machine for them to achieve this and had failed.

We were approached by a Medical Company producing .3mm dia needles, they wanted to grind a quantity of 200 at a time, with a main bevel point of exactly 82 degrees, and a secondary angle of 78 degrees, with a pencil point on the other end.