John A. L. Mills & Associates Pty Ltd

Machinery Makers to the Gentry since 1976

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20 Hewitts Road
Carnegie 3163
Tel 0412 426 096
Fax 03 9569 6164

Servo Controlled Air/Hydraulic Pumps

Servo Controlled Air/Hydraulic Pumps

ServoMotorPumps.jpg These air/hydraulic power sources are fitted with pneumatic actuators to control their operation.

The pumps can be placed In a pneumatic circuit to power hydraulic clamps or cylinders just like other pneumatic devices. They can be used for linear or rotary actuators, or for work-holding applications. Varying the air pressure regulates the holding force.

In the example above the pumps are controlling the clamping functions and the mandrel movements of an NC tube bender.

In their standard form the power sources have a treadle to control the pump and the release valve.

Portable Hydraulic Bar Cropper

A portable power tool to cut the old ladder supports from sewer access shafts to within 5mm of the wall. The material is 12x50mm mild steel flat bar which is set into the access shaft walls. The cutting is necessary to remove the ladders for replacement when they are no longer safe to use.

Previously the cutting was done with pneumatic hacksaws, oxy/acetylene and friction blades are unsuitable because of the explosive atmosphere.

The machine is actuated by an ENERPAC hydraulic hollow cylinder powered by a servo controlled air/hydraulic pump.