This sort of goes along with 75Plus's thread
HERE since the spindles are alike.
My neighbor picked up a Delta/Rockwell drill press with a very wobbly spindle. Apperently somebody must of
with a big hammer because the spindle was running out about .050". He asked if I could make a new one. Sure why not, ain't got nothin' else to do.
So here is how I did it.
I didn't take any pictures of turing the taper on the end for the chuck. Easy to do though. I used the compound slide. I used a last word indicator to tram the old part. Once the indicator read zero for the full length of the travel I cut the taper on a new piece of cold rolled stock.
Since the bushing that has the two teeth that were pretty well worn I just used a small end mill the fit in the "V" groove of the old spindle. Next I set up the Spindex and trammed it in.
Found the center using a wiggler. Touch the back side then did the front and took half of the distance traveled to get to the center of the rod.
Next I put in the piece of cold rolled stock. Touched off the bottom of the mill and went up another .020" for the first cut. I noticed that I had a slight vibration will cutting so I used two "V" blocks stacked on top of each other and some shim stock to get a snug fit in the "V". Then I used a clamp to gently hold the part in the groove. A pain in the butt, but I didn't break the cutter. I kept increasing the depth by rasing the table .020" untill I reach a depth of .150".
I also found a clamp handy when I first started into the cut. It was swapped for the end clamp when I got close to this clamp.
Next came the hole for a spring pin. I got the distance by laying the old shaft next to the new and eye balling (eye's are calibrated to 10,000th of an inch
)
And there is the finished shaft. I'll see if it fit's tomorrow when I go see my neighbor before we go for cocktails.
And another bit of info. Memeber's are always asking about feeds and speeds. This cutter is an .125" dia. run at 1000rpm and 1" feed per minute. I didn't use any formula to compute this. I just picked it out of thin air.
Bernd
