HMT Machine Tools Limited manufactures CNC Double Column Portal Vertical Machining Centre. HMT Machine Tools Limited manufactures Machine Tools. The CNC Double Column Portal Vertical Machining Centre can perform complete machining operations - Milling, drilling, counter boring, and rough and finish boring, tapping, real spot facing and gun drilling. The CNC Double Column Portal Vertical Machining Centre has integral rotary table fitted in the main table in flush with top of the main table. The CNC Double Column Portal Vertical Machining Centre has Right angle attachment with horizontal spindle with provision for mounting gun-drilling attachment with facility for flow of high pressure coolant through spindle.