Miyano BND-51SY2 combines extended machining accuracy with process versatility

Available from Citizen Machinery UK, the 51 mm bar diameter and optional 210 mm chucking capacity Miyano BND-51SY2 is configured around a single 12-station Y-axis turret serving both the main and secondary spindles. The combination of the Y-axis turret with the independent drives to the rotary tool positions and the availability of special double sleeve toolholders and double turning toolholders, provides the capability to set multiple tools at each of the 12 turret positions. For example, off-centre and large boss and pocket milling can be carried out using circular and linear interpolation functions; cross drilling and tapping in X-Y and Z-X planes can be combined with C-axis positioning; and simultaneous rotation for contouring involving C, X and Z-axes can easily be achieved. In addition, a polygon machining option is also available. The main spindle is powered by a 15 kW motor and the secondary spindle by 5.5 kW motor. Each develops speeds between 50 and 5,000 rpm and they are served by the single, 12-station turret having a Z-axis feedrate of 20 m/min over its 435 mm stroke. The 530 mm B-axis and 175 mm X-axis have rapid traverse rates of 18 m/min and the +40/-35 mm Y-axis stroke is covered at 12 m/min. Driven tool power is 2.2 kW with 20 Nm of torque available for drilling and milling cycles involving tools up to 13 mm diameter. M8 tapping can be carried out at fully programmable speeds between 60 and 6,000 rpm. Control is via Fanuc 0i-TD, a simultaneous 4-axis unit incorporating Citizen influenced Miyano operational software. One touch operation covers areas such as customised menu for selectable screen display, featuring elements such as the measurement of cutting time, non-cutting time and running times in each cycle.