Gast oil-lubricated air motors, combined with a gearbox

Gast's gear motors combine the oil-lubricated rotary vane air motors 1AM, 1UP and 4AM with a built-in gear reduction. The result is low speed and high torque directly on the output shaft (reduction, speed):

• 1AM-GR11: 15:1, 350 rpm
• 1UP-GR11: 15:1, 400 rpm
• 4AM-RV-75-GR20: 10:1, 300 rpm
• 4AM-RV-75-GR25: 15:1, 200 rpm
• 4AM-70C-CB20: 20:1, 150 rpm
• 4AM-70C-CB60: 60:1, 50 rpm

Like Gast's other air motors, the gear motors convert compressed air into mechanical energy without electrical components. Gast describes them as built for durability and suitable for use in hazardous areas and at extreme temperatures, with shock-free, instant start, stop and reverse for precise control. They can be run in any position. The data sheets state compliance with EN 13463-1 for non-electrical equipment in potentially explosive atmospheres (group II, category 2, gas and dust, surface temperature 135 °C). The maximum torque in Gast's gear motor range is 1650 in-lb (190 Nm).

Gast supplies air-powered gear motors in both right-angle and in-line versions. Typical applications are mixing equipment, conveyor drives, pump drives, food and pharmaceutical packaging, hoists and winches, hose reels, fibreglass cutters, tensioning devices and turntables – tasks where low speed and high torque matter more than high speed.