Re: [CAD_CAM_EDM_DRO] Re: sherline Ballscrews (Yes, you CAN!) But I wouldn't.

I was going to make a post here about my Moglice expierence, but thought
Id wait until I had a success to report.

First, I am not using Moglice, rather the Philadelphia Resins brand of
similar goo. I am convinced theirs is simply graphite mixed into the
epoxy, and a friend has a sample of it he is trying to analyze for me. I
intend to get some real Moglice.

I tried to make new nuts to run on the existing Grizzley screws. I
figured since they were brand new, they will have no wear. I built up
new brackets with a hole for the casting, and a simple turned fixture
to hold the screw and nut in position to cure. I used the Release Spray
sold by PR.

After an overnight cure I tried to unscrew the parts. One was stuck very
hard, and while trying to unscrew it (get a bigger wrench) I broke the
epoxy loose from the inside of the nut body. I was then able to slice
through the epoxy with a dremel cutoff wheel and free the epoxy. It was
NOT stuck to the screw, it unwound nicely once I relieved the tension of
the cast. I assmue the release agent worked as planned to prevent
bonding, and I simply had to little clearance.

The second one unscrewed with some resistance. I then tried to screw it
back on and it would only make 4 or 5 tunrs and bound up. I tried the
'more force' approach and again broke the epoxy loose from the nut body.

Clearly I did not have enough clearance. I did spray on several coats of
the release agent, I was very worried that it would bond to the screw. I
mayhave made the nut body to long- It was about 1.4" long, so for a
16tpi thread I had over 20 threads in contact. I suspect a shorted nut
would be fine, but the way I decided to fixture it just worked out that
long. When I do it again I may use more putty as a dam and shorten the
screw length.

I also intend to change to some 1/2-10 acme rod instead of the 5/8-16
that came withthe Grizzley.

Ill let you all know when/if I get this to work.

ron