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Power chucks



TAF Type Hydraulic Power Chucks with Automatic Jaw Adjustment

The major advantages of the new automatic jaw adjustment chuck family:


No such hydraulic chucking machine has appeared on the market yet up to now that could safely perform these duties without the significant modification of the machine.
Automated: Changeover to different diameters requires no manual interaction.
Fast: The adjustment of the three jaws takes place at the same time, so the operation requires three times less time as a minimum related to any previously applied methods.
Universal: The chuck makes automatic changeover possible within its entire diameter range.
Interchangeable: It is simply installable into the place of other traditional hydraulic chucks, the neccessary additive elements are provided together with the chuck.
Prodoctive: The dynamically balanced chucks make high cutting speed possible.

The construction of several types of the chucks allows manual operation mode for quick changing of the jaws. The specific tool being created for this purpose is releasing the connection - secured by teeth - between the basic jaws and chuck jaws. At this time the chuck jaws can be pulled out and pushed back in opposite position, or replaced with another one. 

Our chucks are balanced by a PC-controlled dynamic balancing equipment.

Quality grade of balancing: according to the standard No. G 6,3 ISO 1940/1




The structure of the TN type normal hydraulic chuck

The structure of the TNtype normal hydraulic chuck in its main characteristics is identical to the design of the tractive spacer power-operated chucks.
The piston of the hydraulic pinch roll fastened to the end of the main spindle moves the central drawhcad of the chuck through the tube being lead across the main spindle bore, the central nut and disc, forcing the inner jaws to a radial move through the key-ways. The chuck jaws can be fixed in a radially adjustable way on the teeth located on the front surface of the inner bearers that can be of hardened or soft jaw designs.

Standard chucks, unlike automatic jaw adjusment chucks, have no special CNC turningmachine requirements, that is you can use your old controllers and hydraulic clampings. Automatic jaw adjusment chucks require the main spindle to be positionable and managed by a proper controller.


The TU type wheel chucks

TU typeThe wheel or finger-type (TU...) chucks are designed to grip the wheels for cars or motor-bikes, that have to be clamped on a frontal plate, do not require radial clamping, better saying, due to the deformation of the workpiece, this is not allowed. The position of the workpiece related to the main spindle axle shaft is generally secured by a centralising or position-determining element.The wheels cannot be radially pressed as after release there will be concentri­city problems („polygonisation”) arising. This is why the centring adjustment is to be performed on a cone or fitted shaft, while the fixation takes place on the inner side of the edge of the wheel by clamping it onto the frontal surface of the disk. The frontal surface is to be laid on the seats, and the clamping is resolved by the shackles bridle being fastened to the ending of the arms. For the sake of the exact bearing, the entire surface being in contact with the workpiece is spindled together in the status of being mounted on the machine. The shackle bridle has to press the workpiece axially, at the same time, at opening they have to move radially, too, to make the workpiece removable. The clamping strength is transmitted by the piston of the main hydraulic cylin­ders being fastened to the ending of the main spindle via intermediate links. A 7 mm long part of the upper section of the guiding tracks being formed in the arms is parallel to the main spindle axle shaft, that is to say, parallel with the motion direction of the pin connecting to the lower bore-hole of the arm. Via this parallel leading, in the backside 7 mm motion range of the arm, each point of the arm makes a parallel motion with the main spindle, and by this, the shackles bridles are pressing the workpiece only in axial direction, so there are no radial direction deformations arising on the workpiece.



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