Gallery, Projects and General > The Design Shop
Keeping the head from turning on a cheap mill
Arbalist:
--- Quote from: CrazyModder on December 27, 2013, 01:06:13 PM ---
I guess that any round-column mill/drill is facing the problem I'm trying to solve here.
--- End quote ---
No, not really. If you can get one of these they are very good by all accounts and don't loose registration like the Chinese ones. Sadly the RF25 and clones changed a pretty good design to avoid having to supply a cabinet with the machine into which the column goes up and down like the Ixion or later Naerok machines. In the process they created a flawed design. I nearly bought an Ixion, it's a very well made machine.
http://lathes.co.uk/ixion/
CrazyModder:
Thanks for all the comments.
No, the RF25 is indeed another design, as far as I can tell - on that machine, the column seems to be fixed to the base; in mine, the column is fixed to the head. (In regards to vertical motion - the column-head can be loosened to allow 360° swiveling of the head).
The battle plan looks like this now:
1. Simply roughen the column a bit. It is extremely smooth; maybe sanding it a tiny bit, just to change the surface, is enough to get some tension.
2. If that is not enough, add a few bolts to the rack, and figure out some way to guide it.
Arbalist:
Sounds like a good plan. Any chance you could get the column sand blasted?
CrazyModder:
Good thought, I'll check that out.
Jonny:
With you now, only the base and no through feed through head are different. My drillers the same and a right pain last used 22 yrs ago, rack pinned.
Roughing it up wont do much, worst case you will be reducing diameter and less grab.
Some form of robust cylindrical clamp needs making much like reverse idea of RF25. Junk that toggle single clamp. Easiest If base is a casting, 4 billets cast welded on back to put two M12 bolts through. Then saw down middle of casting extending the slot that's already in for toggle, so it closes up on column over a wider span.
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