Leamington Spa-based Mills CNC, the exclusive distributor of Doosan machine tools in the UK and Ireland, has launched a new range of large-capacity, multi-tasking mill-turn centres.

The Puma SMX 5100L series, the largest in Doosan’s SMX range, has been designed and built to handle large, heavy workpieces typically found in the aerospace, energy and oil and gas sectors, and machine them in a single set-up.

There are four different models in the SMX 5100L range with the largest machines having chuck sizes up to 21in, a maximum turning diameter of 830mm and a maximum turning length of 3,050mm.

The SMX 5100LS and SMX 5100LSB machines are equipped with high-torque, built-in (left and right) spindles (up to 37kW/2,400rev/min) with 0.0001deg resolution on their C axes for high-precision contouring. Both models feature a programmable, servo-driven tailstock, instead of a sub-spindle, for the precision machining of long shafts and tubes.

All four models in the range are supplied with a powerful and versatile B-axis milling head (+/-120deg stroke) that features the Capto C8 quick-change tooling system and are powered by a 37kW motor that rotates at 10,000rev/min. The roller gear cam mechanism that drives the B-axis eliminates backlash and is highly rigid, capable of outputting torque of up to 2,700Nm.

The productivity and performance of the range is further optimised by ultra-fast rapid rates (40m/min), 520mm Y-axis capability and heavy-duty high-precision roller LM guideways.

The machines are also equipped with generous-sized, servo-driven tool changers (up to 120 tools), with the machines’ ATCs also having their own touch screen operation panel for ease-of-use, efficient job set-ups and improved process reliability. Long boring bar and long tool magazines are also available, as options, that further extend the machines’ application potential.

From their rigid design and build and their sealed guideways, that prevent chip and coolant ingress, through to their spindle, headstock and ball-screw cooling systems, that keep thermal deformation under check, SMX 5100L machines deliver unrivalled accuracy even during long machining runs.

The Puma SMX 5100L series also comes supplied with the latest CUFOS (Customised User-Friendly Flexible Operating System) Fanuc-based control - Doosan’s new, customisable, app-based front-end control interface that, with a 19in touchscreen and enhanced 3-D graphics, uses conversational programming software as well as access to a range of process reliability functions inlcuding machine collision avoidance, to improve performance and efficiency.

Tony Dale, Mills CNC’s technical director, said: “Everything about Doosan’s new Puma SMX 5100L multi-tasking mill-turn machine range is impressive, from its size and capacity, right through to its speed, power, accuracy and versatility.

“Although only just launched onto the market, we believe that the new SMX 5100L machines will become immensely popular and successful.”