CNC lathe chuckGMT CNC Lathe Chuck rotates at high speeds, suitable for modern turning centres. Power Operated Three Jaw Chuck with Through Bore (PHNC) is one of India’s largest selling and most trust chucks for CNC Lathes and turning centres.


Standard sizes available (3 jaw) 135mm, 165mm, 200mm, 250mm, 315mm, 400mm and 500mm. Two Jaw and 4 Jaw chucks with through bore are available on request.

Power Operated Three Jaw Chuck with Through Bore (PHNC) :

GMT Power Operated Hollow High-Speed Chucks rotate at high speeds on CNC lathes. The compact construction of GMT CNC lathe chuck offers the further advantage of less weight and low inertia, which positively influence the dynamic effect of the CNC machine spindle. These power chucks have a large through-bore and are therefore suitable for bar work. The base jaws and top jaws weigh less in these chucks.

cnc lathe chuck performance detail

cnc lathe chuck specification drawing

cnc lathe chuck specification

cnc lathe chuck-jaw-drawing

cnc chuck chuck jaw specification chart


  • Hard Jaws are common for PHNC & PHCNC
  • Soft Jaws are supplied as blanks and are common for PHNC & PHCNC
  • *Offered in PHNC only.
  • Only Soft Jaws are available with 2 Jaw Chucks
  • Serration 1.5 x 60o on Base jaws, Hard jaws and Soft jaws are on request.

Power Operated Three Jaw Centrifugally Compensated Chuck (PHCNC):

Standard power chucks will not work at the speeds used in CNC Lathes, because of the tremendous centrifugal force. At these speeds, the chuck will tend to loosen the job. More importantly, there will be an abrupt and huge loss in the gripping force of the chuck. When there is a loss in gripping power, it will adversely affect the cutting parameters of the lathe. Also, the design is such that the clamping force is very close to the static clamping force, even at very high speeds.

Finally, visit us at – a new blog dedicated to all GMT customers…interact with our technical experts.

error: Content is protected !!