King foundry [india] offers independent chuck [dog chuck]. The body is made of heavy duty cast-iron alloyed with chromium and has a hardness range of 180 - 220 hrc. Jaws are made of steel heat-treated with gripping portion hardened to a hardness 55 to 60 hrc. The screw and thrust bearings are of alloy steel hardened to a hardness 30 to 40 hrc. Fitting on every part within close tolerance gives the chuck a very rigid and accurate grip. Better quality materila with proper heat-treatment gives long life to chuck. Spares being easily available, a quick and better service is possible. All chucks are supplied with inspection chart cum mounting instructions. The company also manufactures special purpose chucks according to job or as per drawing supplied by the customer on request.