F.) Quick Change Gear Box - Sharp 1118H Operations Manual & Parts List

F.) QUICK CHANGE GEAR BOX

The Quick Change Gear Box Unit see (Figure 12 & 14), feed or thread change knob "T",
shifted to left is threading, shifted to right is feed only. The range of threads, their selection
and the position of the knobs for each thread are shown on the chart "C" (Figure 13). Pull
out the ball of gear change arm "A" (Figure 13). Then move arm to left or right, insert in
correct position, and change the selector knob "S" (Figure 13) to 1,2 or 3 position until
desired thread cutting is acquired see (Figure 13). The standard threads and pipe threads
are immediately available through the gear box by the use of outside change gears (five
change gear assembly), pitches of threads can be cut to 250 threads per inch.
T
S
C
A
Figure 12-Feed of Thread Change Figure 13-Thread Chart
T
Figure 14-Feed of Thread Change
※CAUTION： ： ： ： DO NOT SHIFT GEARS KNOB "T" WHEN THE SPINDLE IS
RUNNING.
7