The axial tensioner ETP-UNIGRIP is used when workpieces or tools, for example circular knives with spacers, are going to be clamped axially against a shoulder on the shaft in an accurate position.
 

CONSTRUCTION

Hydraulic unit with two clamping systems consisting of a hardened steelbody with an inner sleeve, three axial pistons with seals and two pressure screws.
 

OPERATION

When the first screw (marked R) is tightened the inner sleeve grips the shaft, locking ETP-UNIGRIP in position. As the second screw (marked A) is tightened, the axial pistons move into contact with the component which is to be clamped. The hydraulic principle means that the axial force is evenly distributed between the three pistons, offering accurate clamping of components.
 

DESIGN RANGE

For standard sizes see leaflet.
ETP-UNIGRIP can also be manufactured with a threaded bore without hydraulic expansion of the thread, with more pistons, higher axial thrust force and longer piston stroke. It can also be made to other dimensions on request. Send your application details and we will offer you the solution.

OPERATION

The Knifeholder, ETP-KN, consists of a double-walled hardened steel sleeve filled with a pressure medium. The pressurising mechanism consists of a screw and piston with double sealing function.
When the pressure screw is tightened the double-walled sleeve expands against the shaft and creates a rigid joint. Dismantling or repositioning is done by loosening the screw.
Clamping alternative: On request the holders can be equipped with a nipple. In this case pressurising is done with a grease pump.
 

All development starts with establishing a technical requirement specification together with the customer. The whole process will be a teamwork with the customer, the ETP-Representative and us.

As a start sometimes the “Application design assistance form” on our homepage is sent to us. You find it in the download section here next to. This is a very important process. It contains listing the loads and other surrounding factors influencing the application.

At the next stage ETP makes some principal drawings which are discussed with the customer. In house we have the latest CAD software and FEM calculation capacity. For production we have the for the quality of the final product most important machinery in house, like welding machines of different kinds: conventional, laser and electron beam welding. Other important operations are grinding – if needed, filling of pressure medium, quality control (with ultra-sound for the weld) and accurate turning.

For more examples of ETP Customized designs see the Manual in the download section here next to.