The model 20G is a bench-mounted, single-side planetary fine-grinding machine with a pneumatic lift down-pressure control system. Lapmaster International designed it to execute tight-tolerance grinding processes while producing repeatable results. The machine uses a fixed abrasive diamond suspended in resin, metal and vitrified bonds for grinding a range of materials. The model 20G is available with a 5-hp, 60-Hz or 4-hp, 50-Hz variable-speed motor and gear reducer. Independent controls allow the use of each of the three workstations separately.