Gast 4AM-ARV-119 Air Motor

Description

The 4AM-ARV-119 is the “smooth-running” specialist of the 4AM metric-mount family. By doubling the number of vanes from four to eight, the motor minimizes the “pulsing” effect common in pneumatic motors. This results in more consistent power delivery and higher starting torque, which is critical when the motor must begin rotating under a heavy load or at very low RPM.

Like all Gast air motors, it is inherently Explosion Proof. The expansion of compressed air through the motor naturally cools the cast-iron housing, allowing it to operate in ambient temperatures up to 121°C (250°F) where electric motor insulation would 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

8-Vane Performance: Offers superior “inching” control and smoother rotation at low RPM compared to 4-vane models.
IEC #72 D71 Mounting: Features a standard metric flange and a 14 mm keyed shaft, making it a “drop-in” replacement for standard metric-frame electric motors.
Reversible Operation: A 4-way control valve allows for instant reversal of rotation, even while the motor is under load.
Variable Speed: Easily adjusted from 300 to 3,000 RPM by regulating the air pressure or flow volume.
Stall-Safe: Unlike electric motors, this unit can be stalled indefinitely without damage, overheating, or risk of fire.
ATEX & CE Certified: Approved for use in Group II, Category 2 (Gas & Dust) hazardous environments.

Specifications

Feature	Specification
Maximum Power	1.7 hp (1.27 kW)
Maximum Speed	3,000 RPM
Number of Vanes	8
Maximum Torque	56 lb-in (6.3 Nm)
Starting Torque @ 80 psi	42 lb-in (4.7 Nm)
Port Size	1/8″ BSP
Shaft Diameter	14 mm
Net Weight	12 lbs (5.4 kg)

Applications

Precision Agitators: Ideal for mixing paints, chemicals, or slurries where a steady, non-pulsing rotation is required to maintain product consistency.
Hazardous Area Winches: Providing reliable, smooth pulling power in refineries, mines, or offshore platforms.
Conveyor & Feed Drives: Powering transport lines that require frequent starts/stops or very slow, consistent travel speeds.
High-Heat Material Handling: Operating near furnaces or industrial ovens where electric motor components would melt.
Laboratory Equipment: Used in automated testing rigs where pneumatic safety and precise speed control are required.