Gast 4AM-RV-75-GR20 Gear Motor: Efficient 10:1 Torque Control

Description

Gast 4AM-RV-75-GR20 Gear Motor is engineered for demanding industrial tasks. Because it is powered entirely by compressed air, it is ATEX and CE certified for use in explosive atmospheres (Zones 1 and 2). The 4-vane configuration provides a balanced, cost-effective power output capable of adjusting speed and torque simply by varying the air pressure.

A major technical advantage is its thermal resilience. As air expands through the motor, it naturally dissipates heat, allowing the unit to operate in ambient temperatures up to 121°C (250°F)—well beyond the limits of standard electric gear motors.

Why the Gast 4AM Gear Motor is the Best Investment

Investing in the Gast 4AM-RV-75-GR20 Gear Motor is an efficient decision for any facility looking to optimize its mechanical drives while ensuring maximum safety for personnel. One of the most practical aspects of the Gast pneumatic line is the simplicity of its mechanical integration. By combining the air motor and a 10:1 gearbox into a single, pre-engineered unit, you eliminate the need for complex external drive components like belts, chains, and pulleys.

The efficient thermal properties and explosion-proof nature of this motor make it a preferred choice for modern factory automation in harsh or volatile zones. Backed by Gast’s world-class American engineering, the Gast 4AM-RV-75-GR20 Gear Motor delivers significantly more torque-per-inch than equivalent electric motors, all while remaining safe to touch in high-temperature environments. When your operation demands the perfect balance of pneumatic torque, bi-directional control, and spark-free safety, the 4AM-RV-75-GR20 is the most efficient and dependable solution.

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.

Specifications

Feature	Specification
Maximum Power	1.7 hp (1.27 kW)
Gear Ratio	10:1
Max Speed	300 RPM
Max Torque	640 lb-in (72.3 Nm)
Starting Torque @ 80 psi	300 lb-in (33.9 Nm)
Max Air Consumption	30 CFM ( $51 m^3/h$ )
Port Size	1/4″ NPT
Shaft Diameter	1.000 in (1″)
Net Weight	28 lbs (12.7 kg)

Features

10:1 Gear Reduction: Provides a maximum output speed of 300 RPM, offering a faster alternative to higher-ratio models like the GR25 while still delivering significant torque.
Dual Mounting Options: Features both Face and Foot mounting capabilities, allowing for easy integration into existing machinery or custom brackets.
Large 1″ Output Shaft: Equipped with a heavy-duty, keyed 1-inch (25.4 mm) steel shaft to manage the high torque output without shearing.
Explosion Proof: Non-electrical design is safe for chemical plants, refineries, and spray 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, overheating, or the risk of electrical burnout.

Applications

Heavy-Duty Agitators: Mixing higher-viscosity chemicals or coatings where a balance of speed and torque is required.
Conveyor Systems: Powering transport lines in hazardous or “wash-down” environments.
Hose Reels: Retracting long-length industrial hoses in fuel depots or refineries.
Indexing Tables: Rotating heavy automated platforms that require precise, spark-free speed control.
Pumping Systems: Driving positive displacement pumps in processing plants where flammable vapors are present.