"DeepDiver" wrote in message
...
I recently acquired a used Rong-Fu RF-30 Mill-Drill (unfortunately, no room
for a full-sized mill). The drawbar that came with it had been modified by
welding a flanged nut to the top. Regarding this last point, I was
thinking about threading a section at the top of the drawbar and adding a
"tightening nut" below the hex head. Then I would insert the R8 tool, spin
the drawbar by hand (using the hex head) into the R8 tool until snug
against the top of the spindle, put a wrench on the drawbar hex head to
stop rotation, and then use a second wrench to turn the "tightening nut"
down against the top of the spindle to put tension on the drawbar and lock
the R8 tooling in the spindle taper. To remove the tooling, again use two
wrenches: one to stop the drawbar from rotating and one to back the
"tightening nut" away from the top of the spindle. Then whack the top of
the hex head to free the R8 tool from the spindle taper. What do you
seasoned pros think of this plan? Or is there a better way?

This is exactly how I modified my drawbar. works great.