Gast 4AM-RV-75-GR25 Reversible Air Motor 1-1/4 Hp

Product Description

The GAST 4AM-RV-75-GR25 is a 1-1/4 horsepower reversible air-actuated motor with an integrated 15:1 gear ratio gearbox, designed for industrial and trade applications where pneumatic power is required. It delivers a maximum output of 200 RPM and up to 640 inch-pounds of torque, making it suitable for driving conveyor systems, positioning equipment, and other torque-demanding mechanical loads. The motor accepts a 1-inch keyed shaft and mounts via face or foot configurations. Licensed HVAC, industrial, and mechanical contractors typically specify this unit where compressed air is the preferred power source over electric drives.

This air motor is suited for use in manufacturing, industrial processing, and mechanical service environments where variable-speed or reversible pneumatic drive is required. The dual mount style — face and foot — gives installers flexibility in how the unit is integrated into an assembly or machine frame. With a minimum RPM of 0 and a maximum of 200 RPM, it supports controlled, low-speed operation under load. Maximum air flow is rated at 60 SCFM and maximum working pressure is 80 psi, making it compatible with standard industrial compressed-air systems.

Key Features

• 1-1/4 HP pneumatic motor with reversible shaft rotation for bidirectional drive applications
• 15:1 gear ratio delivers up to 640 inch-pounds of torque at a maximum of 200 RPM
• 1-inch keyed shaft accommodates standard mechanical couplings and sprockets
• Face and foot mount compatibility provides flexible installation in tight or varied machine configurations
• Maximum working pressure of 80 psi aligns with common industrial compressed-air supply systems
• Variable speed range from 0 to 200 RPM supports controlled, load-dependent operation

Compatibility

Designed as an OEM-style pneumatic drive motor for industrial machinery and mechanical assemblies requiring reversible, gear-reduced air-actuated power with face or foot mounting.

Installation Notes

Installation of this air motor should be performed by a qualified mechanical or industrial technician. Shut off and bleed the compressed-air supply line before mounting or servicing the unit. Verify that the supply air pressure does not exceed 80 psi and that the air supply is clean and dry, as contaminated air can reduce motor service life. Secure all fittings and mounting hardware before returning the air supply to service.