The Advantages of Air Motors and How to Size One

The Advantages of Air Motors and How to Size One

Air motors have found widespread success in both the hand-held and stationary tool industry. An air motor does the mechanical work by expanding compressed air. The motor converts the compressed air energy to mechanical work through the rotary motion. The power that an air motor produces is the end product of torque and speed. Air motors are compact, reliable, and light weight, making them an ideal solution for many applications.

Air motors are extremely versatile and can be used for mixing liquid substances, moving, drilling, milling, grinding, sawing, amongst other things. Therefore, air motors can be used with conveyor belts, machine tools, automatic feed devices, and on bottling machines. Some air motors come with ATEX certification allowing operation in an explosive environment.

In comparison to electric motors, air motors are small and light weight, easy to control, and robust in design. It is a safer solution with no risk of over-heating, sparking, or generating short circuits. Speed, power, torque, and air consumption can be easily controlled by changing the input air pressure. Air motors operate in all orientations and are reversible. If you have a space constraint, air motors could be the solution. Air motors are available with a variety of drive shaft options.

Additionally, air motors are easy to maintain and repair. Air motors can stall without damage. They can be used in humid environments and do not suffer overheating – the more the motor runs, the cooler it becomes.

For additional information on air motors, contact ASG at asginfo@asg-jergens.com or by visiting their webpage at www.asg-jergens.com.

HOW TO SIZE AN AIR MOTOR:

  1. Determine the product performance requirement.
    • Example: Need approximately 500 RPM at 2.5 N.m load

  2. Calculate the size of the air motor needed using this formula:
    • (π x L x S) 30 = P
    • L: Torque in N.m
    • S: Speed in RPM
    • P: Power in Watts
    • Example: Need approximately 500 RPM at 2.5 N.m load
    • (3.14 x 2.5 x 500) 30 = 130.8 Watts

  3. Determine if a non-reversible or reversible motor is needed.

  4. Find the reversible or non-reversible air motor that has a power rating closest to the calculated power in watts.

  5. Determine the type of spindle needed.

  6. Determine if a mounting flange is needed.

Take a look at the ASG Fiam Air Motor catalog to view all air motors available!

asg-smooth-output-shaftasg-collet-shaftasg-threaded-output-shaft

Jan 13th 2021 ASG, Division of Jergens, Inc.

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