Gast 4AM-RV-75-GR25 Gear Motor

Description

The 4AM-RV-75-GR25 is a robust alternative to electric gear motors in areas where sparks, heat, or moisture are concerns. Because it is powered entirely by compressed air, it is ATEX certified for use in explosive atmospheres. The in-line design allows it to be mounted directly in the drive path, making it ideal for narrow machine frames.

Unlike worm gears, the in-line reduction on this model offers high power transmission efficiency. Its thermal resilience allows it to operate in ambient temperatures up to 121°C (250°F), which would cause standard electric motor insulation to fail.

Brand

GAST

Since 1921, Gast Manufacturing, Inc. has been a leader in the design and manufacturing of quality air-moving products. We specialize in offering cost effective solutions for a wide variety of industries including industrial manufacturing, healthcare, and environmental cleanup applications.

Features

25:1 In-Line Gearbox: Efficiently converts high-speed air motor rotation into a maximum output speed of approximately 120 RPM.
4-Vane Configuration: The industrial standard for the 4AM series, providing a reliable balance of speed, torque, and air consumption.
Variable Speed & Torque: Output can be precisely tuned by adjusting the air pressure (PSI) or flow volume (CFM) via a regulator or needle valve.
Explosion Proof: Non-electrical operation makes it safe for chemical plants, refineries, and paint booths.
Instantly Reversible: A 4-way control valve allows the motor to switch rotation directions instantly, even under full load.
Stall-Safe: Can be stalled indefinitely without damage, providing built-in protection against mechanical jams.

Specifications

Feature	Specification
Maximum Power	1.2 hp (0.89 kW)
Gear Ratio	25:1
Max Output Speed	120 RPM
Max Continuous Torque	450 lb-in (51 Nm)
Max Air Consumption	78 CFM ( $132 m^3/h$ )
Port Size	1/4″ NPT
Shaft Type	Keyed Straight Shaft
Net Weight	Approx. 15 lbs (6.8 kg)

Applications

Medium-Duty Agitators: Driving mixers for coatings, chemicals, or food products in 55-gallon drums or small tanks.
Conveyor Drives: Powering transport belts in “wash-down” environments or hazardous processing zones.
Hose & Cable Reels: Providing high-torque retraction for heavy industrial lines in fuel depots.
Indexing Tables: Rotating automated platforms where pneumatic safety and variable speed are required.
Valve Actuators: Operating large industrial valves that require high starting torque and reversible motion.