PANTHER
MODEL PAGE NO.
1350/1650 32
Limitation of change gears.
For any odd threading, if you calculate change gears than
following are the limitations for change gears.
A = 66 Teeth (maximum) X 14 DP
C + D = 240 teeth maximum X 14 DP
D < 127 Teeth maximum X 14 DP
Thread dial indicator (35) is usually used for thread cutting
operations. This device permits dis- engaging the half nut at the end of
the cut, returning the carriage to the starting point by hand and than re
engage the half nut at the correct time so that the tool will follow the
original helix formed during first cut. This eleminates the revesing of
lathe spindle.
For machine having 4 TPI lead screw.
For all odd and even threads in each inches (i, e, 4, 5, 6, 7 TPI etc.)
close half nut at any line on the dial.
For all threads involving half thread in each inch (i, e, 4.5, 5.5, 6.5
TPI) close the half nut at any alternate line on the dial.
For cutting metric threads, the dial indicator cannot be used. But
Method is only to reverse spindle without dis- engage, half during
second and subsequent cuts.
For Machine having 6 mm pitch lead screw. In British threading
operation, Thread dial indicator cannot be used but method is only
reverse spindle without disengage the half nut during second and
subsequent cuts.
To Next Page
Loading...