Gast Air Motor and Air Gearmotor

Gast Manufacturing

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.

Gast’s wide array of pneumatic products include vacuum pumps, compressors, air motors, gear motors, vacuum generators and regenerative blowers – all tailored to meet the many challenging applications of OEMs and end users worldwide. Our products are trusted to operate in critical applications, due to their advanced performance and durability. To virtually eliminate downtime, they’re also designed for ease of serviceability and many are equipped with dual-voltage motors – making them the most versatile products in the industry.

Gast has extensive knowledge of the pneumatic industry and our customer’s needs continually drive the development of new and innovative products. With the expertise of our engineers and designers, we’re able to help identify and implement optimal products for each of our customers’ specific applications.

Pneumatic Motor & Air Gearmotor

Gast rotary vane air motors use compressed air to produce rotational motion of a shaft.  Rotary vane air motors have axial vanes fitted into a slotted rotor, which mounts eccentric with the bore of the motor’s housing. The vanes extend to seal against the housing bore using springs, cam action, or air pressure, depending on the motor design. Torque develops from the pressure of the compressed air acting on one side of the vanes causing the rotor to spin

Gast Air Motor Known industry-wide for their rugged construction and reliability. Gast Air Motors and air powered Gearmotors are available in both lubricated and oilless models. These air motors and gear motors are used in many industrial applications, from mixing equipment to running pump drives.

• Self-sealing vanes take up their own wear, ensuring consistent output for thousands of hours of use
• Variable speed capabilities allow flexibility and versatility in any number of app
• The cool-running operation means air motors can be used in ambient temperatures of up to 250° F (120° C)
• Non-electrical operation reduces the possibility of an explosion from igniting flammable gases
• Cool running
• Compact, portable
• Mount in any position

Gast Air Motors are designed to thrive in harsher environments. Their lubrication protects internal components and helps carry away smaller particulate. Which can evade filtration, while also providing heat dissipation benefits?

Air motors differ in many ways from other power sources. These unique operating characteristics must be considered when selecting an air motor for a particular job. It is easy to change the horsepower and speed of an air motor by throttling the air inlet.

Therefore, the best rule of thumb for selecting a motor is choosing one that will provide horsepower and torque. It needed using only two-thirds (2/3) of the line pressure available. The full airline pressure will then be available for overloads and starting.

Feature

Compressed air into an air motor forces the sliding vanes out of the eccentric-mounted rotor. An extended shaft on the rotor spins
to perform the work.

• Modular design (MVP)
• Available in lubricated or non-lubricated models
• Variable speed
• Non-electrical sparking
• Cool running
• Compact and portable
• Operate in all positions
• Mounting flexibility -hub, foot, face, NEMA C-Flange, or Metric D Series interface mountings and clockwise, counter-clockwise, or reversible rotations
• Four and eight vane models also available
• Air powered gearmotors are available in right-angle and in-line models
• A full line of recommended accessories available

Typical Applications

• Mixing equipment
• Conveyor drives
• Pump drives
• Food packaging
• Pharmaceutical packaging
• Hoists and winches
• Hose reels
• Fiberglass choppers
• Tension devices
• Turntables

Output Power vs. Speed

The output power of an air motor is relative to speed and to airline pressure.

Air Consumption vs. Speed

Air consumption increases as speed and air pressure are increased.

Torque vs. Speed

• An air motor slows down when the load increases… at the same time, its torque increases to a point where it matches the load. It will continue to provide increased torque all the way to the stalled condition, and it can maintain the stalled condition without any harm to the motor.
• As the load is reduced, an air motor will increase speed, the torque will decrease to match the reduced load.
• When the load on an air motor is either increased or decreased. Speed can be controlled by increasing or decreasing air pressure.
• Starting torque of an air motor is lower than running torque. While this provides smooth, low-shock starting, it is necessary to have additional airline pressure for starting under heavy loads.

There are several points regarding the safety of air motors. Our air motors are not a source of electric sparks. However, it is possible that an article which is not part of the air motor (e.g., wrenches, hammers, etc.) could create a spark by sharply impacting a cast iron or aluminum case or the steel shaft of the air motor.

Gast Air Motors are designed to be operated by compressed air, the expansion of which creates a cooling effect. As a result, the outside surface temperature of the air motor will not reach ignition temperature. And the maximum surface temperature of 275 °F/135 °C. Operation of the air motor with compressed air purges a flammable mixture from the inside of the air motor. To prevent static electricity from being an ignition source electrically ground the metal-air motor.

Gast Air Motor Products

Gast 1AM Series Air Motor

The compact and portable 1AM/1UP series offers variable operating speed and power output that can be adjusted to meet the precise needs of your application. Their air throttling and pressure control is not only cost effective over electric motor controls, but they also can be stalled or overloaded for long periods without damaging the motor. In addition to being a non-electrical device and cool running, Gast air motors are ideal for use in hazardous and extreme ambient temperature locations.

Air Motors Product Overview

Air Gearmotor Product Overview

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