Miyano BNJ42SY3 turns hard materials fast

The new range has the advantage gained from the latest Fanuc control integrated with a Miyano interface, the company's 'Stealth' thermal tuning technology for maximising stability in the working environment and Citizen software that will reduce idle time and takes the BNJ machine into a different league of price-per-part-performance. Requiring a floor space of just 2.7 by 1.5 m, the Miyano BNJ-42SY3 is the first machine from the fixed head turn-mill specialist to feature Citizen software. This significantly improves the optimisation of cycle times through combined and overlapped movements. The BNJ has a main 11 kW spindle giving 6,000 rpm and a 5.5 kW, 5,000 rpm sub-spindle, both serviced by an all-driven main 12-station and a six-station back-working turret. Two mechanical and operational elements benefit reductions in idle time, with the introduction of two concave sections in the backworking turret and the ability to install an off-centre collet in the rear spindle. As the back-working turret finishes an operation and indexes, the concave section immediately vacates the working zone, allowing the rear spindle to simultaneously feed forward to gain access to any rearward facing tools mounted on the main turret, while its forward facing tools are still engaged with the main spindle. By installing the off-centre collet in the rear spindle and executing an up to 70 mm, X-axis shift, off-centre machining, contouring and parting-off using an endmill rather than conventional blade can be performed. In order to maximise power and rigidity under cut, the BNJ-42SY3 has been developed around the heavy duty turret of Miayno's larger ABX series of machines. This inclusion also provides the added advantage of common tooling, while delivering up to 20 Nm of torque via the 2.5 kW motors in its driven tool stations, each capable of 6,000 rpm. The turret will accommodate drills up to 13 mm dia and taps up to M8x1.25p. There is also a Y-axis with + 40 mm of stroke that can be 'de-specified' from the machine as an option, which enables enhanced side milling, large diameter planetary threading and the effective machining of features such as flats, pockets and bosses on the outside of the component using circular and linear interpolation. To accommodate non-bar work with automatic transfer between the two spindles, a 5 inch chuck can be mounted on both the main and sub-spindle, this enabling larger billet type work to be machined up to 90 mm turning diameter.