ECO-7M Piston Air Engine

ECO-7M Piston Air Engine

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Reduce Air Motor Consumption Up to 15 Times More than Other Brands

Our quiet piston motor produces high torque at low RPM, eliminating the need for a gear reducing transmission. Its lube-free, durable design eliminates the need for oilers.

Autoquip couples the high efficiency piston motor with our patented dual-mode Closed Loop RPM Control that monitors the flow rate of air to the piston motor and adjusts output pressure as the flow changes. The net result is a more constant RPM, regardless of required mixing torque. Our systems are offered in catalyst or mix tank configurations.


  • The #7 air motor has been developed for special applications
  • Incorporates a highly efficient piston design that consumes less air
  • Quick and easy replacement of worn pistons
  • Smoother and quieter operation
  • Lube free design eliminates the need for oilers
  • Durable cam design provides long life
  • Closed loop RPM control available



  • Temperature Range: 14ºF to 176ºF (-10ºC to 80ºC)
  • Height: 8.110”
  • Diameter: 9.606”
  • Shaft Diameter: 0.5” (12.7 mm)
  • Weight: 10 lb (4.5 kg)
  • Pneumatic Connection Air Input: 1/4” BSPP/UNI


  • Speed Range: 100 – 400 rpm
  • Maximum Input Pressure: 100 psi
  • Torque Output at 100 rpm / 6.9 bar (100 psi): 139 (15.7 Nm)
  • Torque Output at 400 rpm / 6.9 bar (100 psi): 69 (7.8 Nm)
  • Max Air Consumption: 800 rpm / 6.9 bar: 7.0 ft3/min (11.9 m3/h)