I posted today on the POTD thread but I thought I would post one last time here.
After a complete over haul, new bearings , complete paint stripping & new paint and a few new mods.
My 7 x 8 lathe is finally back together and done.
Yesterday I tried put my 3 jaw chuck on. I set up my indicator on the spindle flange and read about .005 run out on the outer edge. I reset the indicator to the running face of the flange and then the register of the flange and got a reading of .003 run out. I set up a carbide cutter and turn off the run out. Perfect I got it down to no run out. Then I tried to install my new 4 jaw chuck and dialed it in AAACCCK!! .010 + run out...
I must have made a slight center punch error in drilling the new stud holes as they were too tight for the 6mm studs. I had to oversize the holes with a cordless drill and a 1/4" drill. Something I did not want to do and was a little nervous doing. But it needed to be done. After drilling the holes again, I installed the 4 jaw and dialed it in to less than .0015 run out on the back of the chuck. With a little finesse I can dial it in to zero when I need to use it. Next the 3 jaw. after I got it installed I dialed it in to less than 1/2 a thou run out.
I must say thanks to Adam - Abomb79, mrpete222, oxtool and a few others as I watch new videos all the time for set up techniques. I need a mini Noga !
Today I finished the re build with my tail stock assembly. I had to re set the tail stock with a dead center in the chuck and a live center in the tail stock, matching the points with a threading fish to get within the ball park. Then I turned a piece of aluminum bar. 1/2" x 6" long. I took a .005 pass to clean the piece & took a reading caliper reading, .495. at the chuck but it was 1/2 thou over at the tail. Then I used a micrometer and got a better read. +/- .0005 taper . After final adjustments to the tail stock base and another .005 pass I got a perfect .490 along the piece.
Suddenly the lathe motor kicked out and the lathe jammed as I was using the auto feed.
I hit the reset and heard nothing but a loud HUMMMM from the motor !! ? ? ? WT ? I quickly killed the power.
After inspection of the change gears and drive train I found I installed the wrong washer on the 80 tooth gear and as the feed progressed it tightened the hex bolt / washer and the gear until it jammed the drive train . Whew !
Glad I didnt break anything..
:thumbzup3:
Then I finally got to make some chips !
I made a new aluminum carriage hand wheel and speed handles too.
(This is the first time I attempted to reproduce 2 copies of the same part. ) Success ! with no mistakes ...
This whole project has been a great learning experience for me. hope it helps others with an Asian mini lathe.
Oh , I forgot to install my carriage wipers and felts... get to that tomorrow I'm tired , time for a nap.