Coborn Engineering has been actively involved in many aspects of machine tool design and manufacture for almost 70 years. Formed in 1941, the company originally manufactured high precision spindle and balancing machines. In 1962 this developed into manufacturing Scaif Spindles and Planetary Grinding (PG) machines for the gem and single crystal diamond industry. Then, with the introduction of polycrystalline diamonds in 1978, Coborn designed and made the Reciprocating Grinding (RG) machines. In 2002 we introduced a laser cutting machine for PCD.