Portable hones may be driven by a heavy-duty electric drill, air drill or drill press. Optimum RPM is calculated by dividing 1200 by the bore diameter in inches (for example: 1200 / 6 inches = 200 RPM) or by dividing 30,000 by the bore diameter in millimeters (for example 30,000 / 150mm = 200 RPM). If the power source is a drill press or other rigid stroking device, make sure your portable hone is equipped with two universal joints to provide full floating action at the honing head.
Remember, if you have more questions, contact the Goodson Tech Department at 1-800-533-8010 (customers outside the US & Canada, please call 507-452-1830).