Chuck bungs are primarily used to block the centre of the chuck to stop swarf and coolant going down the spindle. The threaded hole which can be used for the removal of the bung can also be used for mounting a back stop.
ROSA
10143
Drilling capacity in steel mm 40
Spindle taper MT 4
Spindle travel mm 200
Number of speeds n° 12
Speed range rpm 85 ÷ 2000
Max spindle-to-column distance mm 350
Max spindle-to-base distance mm 700
Table size mm 500 × 500
Vertical table ...