Operates on any pressurized gas (0-220 psig). Break-away torques up to 3,700 ft lb. Output speeds up to 12,000 RPM. For industrial gas turbine or reciprocating engines. Standard and custom interfaces available. Helical rotor design. Positive displacement. Roller-ramp overrunning clutch to pre-engage the starter to the turbine. Dynamically balanced, gas tight. Delivers rated torque at 0 RPM.