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The illustration above demonstrates a typical pneumatic assembly. This illustration is for general reference only and may not be applicable to your application.

Hose (airline) from compressor to FRL
Air Quality (FRL - Filter Regulator Lubricator)
1. The filter will help to provide clean air through the supply line to the motor
2. The regulator will maintain desired supply line pressure to the motor
3. The lubricator will provide air line lubrication to air motors not designed to operate lube free
Air Line Components
1. Flow control, ect.
Controls - How do you intend to operate your motor?
Silencer (Muffler)
1. Standard Vane Motor - Primary
2. RM Series Piston Motor - Primary and Secondary
Air Motor
1. Standard Vane Motor
2. RM Series Piston Motor
Brake (optional)
Gearbox (optional)

Vane Air Motors

The vane air motors are the most widely used design of air motors. They are available in a broad range of power and can operate in any position. The vane air motors prove themselves to be a much lighter and more compact compared to piston air motors of similar power. A combination of a Globe vane air motor with a large variety of gearboxes is possible when lower speed and/ or higher torque is demanded for the application.

The most typical vane air motor applications include:

Mixing equipment
Ventilators
Hoists
Winches
Pump drives
Conveyor belts
Turntables
Packing machines
After coolers

Compact Vane Air Motors

The compact vane air motors are motors that have incorporated reduction units. Due to the wide range of gear ratios the compact vane air motors are suitable in many different applications. The compact vane air motors are known for delivering very high speed and very high torque compared to the compact build of the motor.

The most typical compact vane air motor applications include:

Handheld applications
Pipe cleaners
Conveyors in the food industry

Piston Air Motors

The Globe piston air motors are heavy duty air motors. This radial piston air motor combines a large variable speed with high power and torque. The motors have either four or five pistons with oil bath lubrication and their design allows them to deliver the highest power in air motors. A combination of a Globe piston air motor with a large variety of gearboxes is possible when lower speed and/ or higher torque is demanded for the application.

The most typical vane air motor applications include:

Winches
Offshore and other heavy duty applications

Compact Piston Air Motors

The Globe compact piston air motors are used in numerous applications. Due to its unique design the compact piston air motor are most suitable for light and medium duties at low speed operations. A combination of a Globe compact piston air motor with a large variety of gearboxes is possible when even lower speed and/ or higher torque is demanded for the application.

The most typical compact piston motor applications include:

Mixing applications
Winding equipment
Conveyor belts
Hose reels
Turntables
Packaging machines
Cap screwing machines

How to Select the Right Air Motor

Determine the required:

Torque [ft lb]

rotation speed [RPM]

Power [HP]

If one of the 3 parameters isn’t available,,, calculate it:

HP = T x RPM / 5252

T = HP x 5252 / RPM

RPM = HP x 5252 / T

Determine the available airline pressure. (If unknown, calculate with 90 psi)

Does the motor need to start under load or not?

Examples of applications starting under load: hoist, winch and conveyor belt.

Examples of applications starting with no load: fans, pumps and mixers.

Starting under load: calculate with the minimal starting torque to insure sufficient torque at start-up

Select a gearbox if necessary

Example:

Required drive torque: 150 ft lb

Available torque air motor: 10 ft lb

Efficiency of gearbox:

Spur gears: 90 – 95%

Worm gears: 10 – 60%

Reduction is: 150/(10 x 0.9) = 16.7:1 ratio

1 - General Troubleshooting Guide

Low Speed	Low Torque	Won't Opperate	Runs well, then slows down	Possible Conclusion
Yes	Yes	Yes	No	There may be dirt or foreign material in the motor, inspect and flush the motor
Yes	Yes	Yes	No	There maybe internal rust in the motor, inspect and flush the motor
Yes	Yes	No	No	The air pressure may be too low, increase the air pressure
Yes	Yes	No	No	Incoming air line is too narrow, replace with a bigger air line
No	Yes	No	Yes	Limited exhaust - inspect and repair
Yes	Yes	Yes	Yes	Motor is running hot, perform a service maintenance
No	Yes	No	Yes	Inadequate air flow from the air source, inspect and repair
No	Yes	No	Yes	Air source too far from the motor, move the air source closer

2 - Fault Finding - RM Style Piston Motors

The RM series motors are designed to perform at their rated capacities for long periods of time. Faults can develop for the following reasons:

(A) Lack of lubrication. This will result into rapid wear, internal seizure, loss of power or excessive air leakage.

(B) Faults in the air supply system:

Failure to remove the plastic protective dust caps
Insufﬁcient air pressure at the motor caused by:

(a) Supply pipeline or valve too small

(b) If the exhaust is piped away excessive back pressure due to small bore pipes

(d) Clogged air line ﬁlter

(e) The air pressure should remain at the required pressure when the motor is operating at full potential. If the air pressure reduces considerably from the stationary to the rotating conditions, then the supply line or the compressed air available is inadequate for the service operation of the motor.

The motor should always be supplied with clean moisture free and lubricated air. The better the quality of the air the less attention will be required to the motor unit. Air quality should meet ISO 8573-1:2010 class 4 for solid particles and ISO 8473- 1:2010 class 3 for water.

Copies of Globe Air Motor(s) maintenance manuals are available on request. Please contact us.

Product Library & Resources

Globe Catalogue

Vane Motor Catalogue

Piston Motor Catalogue

Compact Vane Air Motor

Compact Piston Air Motor

Non Lubricated Vane Air Motor

Vane Air Motor Brakes

Geared Vane Air Motor PFG