History of GMT - Manual Chucks - India Pistons story

GMT chucks proved very successful in machining auto liners made of CI Castings. India Pistons one of the leading manufacturer of liners had machining problems. PV suggested certain changes in liner casting so that the special jaw to suit our chuck will ensure firm grip on the liner during machining. 

India Pistons were very happy with the chucks performance and recommended our chuck to all their subcontractors and we sold a number of our 3B 250 mm chucks with special jaws....

About the author : Shri. K Jagannathan - Executive Director – Sales & Marketing, GMT.
Sri.K.Jagannathan is synonymous with lathe chucks in the Indian machine tool industry. He has been with Guindy Machine Tools for over 5 decades. His vast experience and immense knowledge of workholding products is evident in some of the most complex workholding solutions provided by GMT. 

GMT Eccentric Compensating Chuck with Retractable Jaws and face drive

GMT Eccentric Compensating Chuck with Retractable Jaws and face drive (PER) is used for machining forgings and black bars between centres in single setup, (i.e.) no second operation necessary.

This Chuck is designed to machine components centre to centre with great accuracy. The retractable jaws are actuated by a hydraulic cylinder or an also centre to centre, since the jaws have an eccentric clamping drive. After various machining operations are done on the component, without stopping the machine the clamping jaws are retracted. 

The torque is then transmitted through the face driver for driving the jaws. The gripped portion can now be finished with fine depth of cut. This ensures that the component is machined right upto the chuck face and the centre to centre machining of component is completed. 

The chuck body is made from forged medium carbon steel and toughened. The levers and hinge pins are made from nickel chrome steel, case hardened and ground in all working surfaces. The hard jaws are made from low carbon steel, case hardened and ground. The special jaws are designed to clamp the component as close to the centre to avoid distortion of the component and provide inconsistent gripping.