Pneumatic (air) clutch brake

Pneumatic Clutch Brake Specifications

A double acting piston drives the single clutch / brake disk against a driving plate for clutching, or against the brake drum for stopping. All friction surfaces are cooled by air drawn through the unit by an internal fan.

Size:
Approximately 7 inches in height, width and length, plus shaft extensions. The input and output shafts are each 1 inch in diameter.

Clutch and Brake Torque:
1,000 lb. in. at 100 psi. Torque is proportional to air pressure.

Application:
This is an air actuated, air cooled, combination clutch and brake for general industrial applications.  It is designed to be used for any manual, cam or electrically actuated 1/4 inch 4-way valve.

Application Suggestions:

  • Always keep the fan guard in place.

  • For maximum bearing life use only enough air pressure to adequately carry your load.

  • Do not use this unit with inertial loads greater than 250,000 in.lb.energy.

  • Do not pick up loads at a rate greater than 2,500 in.lb. per second.

  • Avoid rigid couplings.  Flexible couplings allow for expansion and imperfect alignment and help prevent serious bearing loss.

  • This unit is not designed for continuous slip applications.

  • This unit should not be used in an explosive atmosphere.

  • Avoid locating the unit where friction surfaces may be contaminated by oil or water.

Construction:
All castings are heat treated ductile iron.  Bearings are well spaced and permanently lubricated.  The single pair of splines are more than two inches long.  The bonded friction linings are externally visible.

The following table shows maximum air pressure for a 5 year (10,000 hour) average thrust bearing life for various speeds with unit in the clutching position.  The bearing fatique is negligible when unit is braking.

 

Speed
(rmp)
Max. Pressure
(psi)
Dynamic Tq.
(lb.in.)
Max. HP
3600 63 630 36
1800 83 830 23
1200 100 1,000. 19
600 100 1,000 9

If this unit is operated at half the recommended pressures and torques, the average theoretical thrust bearing life will be 40 years because the life of a ball bearing is roughly inversely proportional to the cube of the applied load.


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