Marshall industries have added a number of new features to all models of their gautam heavy duty all geared capstan lathes. These features are: a very rigid single piece ci base with inbuilt coolant tank; heavier ribbing on beds; anti-friction [turcite ®-b] lining on main saddle as well as turret slide for smoother movement and longer life; improved wipers for saddle and turret slide; centralised lubrication to turret feedbox and slide. Capstans are most suitable for machining medium to large batches of components requiring accuracy as well as heavy rate of metal removal. They can do bar work and also machine castings/forgings held in chucks. They can also be used to premachine large volumes of jobs at low cost prior to finish machining on cnc lathes. I although moel g-4d is economically priced,t has specifications similar to herbert no: 4. In addition, two other models gs 50 and gs 36 [with 50 mm and 36 mm bar capacities] are introduced. Heavier versions with larger swing over bed and higher power for machining large castings and forgings can be supplied with multistate mechanical friction clutch in headstock to enable shifting of spindle speeds without stopping the machine and provide overload and accident protection. Electromagnetic clutches in headstock can also be provided for higher productivity.
