Craig Cooley is the general manager and Tim Sexton is director of engineering and research at US Synthetic Bearings, www.ussbearings.com. Ken Bertagnolli, Ph.D, is vice president, research and development at US Synthetic, 1260 South 1600 West, Orem, UT 84058, Phone: 801-235-9001. The authors have been researching and developing synthetic diamond products for more than 25 years.