These Power Chucks, in which the jaws are actuated with hydraulic or pneumatic cylinders, are designed for CNC lathes. GMT is the preferred brand when it comes to workholding in India. Probably the reason why many leading OEM’s prefer GMT chucks.CALL +91 87544 83577” or mail us at “esales@gmt.co.in


These chucks without through-bore are a good replacement for manual chucks on a conventional lathe to increase productivity. Besides, the actuation of these chucks can be hydraulic, pneumatic or electromechanical.

The actuating unit imparts a linear motion of the wedge, which, in turn, transforms into radial movement of base jaws. This transformation provides a mechanical advantage of 1:4. Consequently, this ensures a minimum of 1:2 mechanical advantage after internal losses, self-locking effect and losses in gripping power at high speed.


These chucks With Through Bore rotates at high speeds on CNC lathes. The compact construction of the PHNC Chucks offer a further advantage of less weight. The low inertia has a positive influence on the dynamic effect of the CNC machine spindle.

These chucks have a large through-bore and are therefore suitable for bar work. The weight of the base jaws and top jaws are comparatively less in these chucks. Not only is the weight reduced, but the method by which it is done lowers the centre of gravity, thus minimizing centrifugal losses.


We have manufactured and supplied chucks for more than five decades in India. We have supplied almost 70000 chucks to the Indian Manufacturing Industry. Thus we have valuable insights into the usage, maintenance and replacement of workholding products. Thousands of satisfied customers in India will attest that the GMT Chuck is the best option for quality production and money in the long run. GMT PHNC-K can replace your existing Kitagawa chucks.


These high-speed chucks with through-bore are ideal for high- speed machining with centrifugal compensation and less gripping force loss. GMT has designed the chuck to take care of the problems arising out of heavy centrifugal losses. Also, the design is such that the clamping force is very near to that of static clamping force, even at very high speeds. The base jaws are connected to counterweights with levers. These counterweights oppose and compensate centrifugal losses at very high speeds.

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