Gallery, Projects and General > The Design Shop
oh no another ball turner
j45on:
I have been trying to mock up a ball turner for my chester commet/sieg c4 before I order the rest of the metal to build it and wanted to make sure I have not made any cock ups/design flaws :hammer:
One of the things I realy want to make is a gear knob for my car so it needs to be able to turn a 50mm (aluminium)ball
which probably makes it a bit shorter than most ?
The first one I drew with inkscape
and the second with sketchup sorry the dimensions are all over the place
I already have the piece of 4" square steel for the base but nothing else at the moment
Does anybody foresee any problems with it ?
Lew_Merrick_PE:
J45,
The only thing that leaps out and bites me is the use of a screw as the hold-down. You need some way to lock it else it will want to tighten or loosen on you as you pivot your ball cutter. A short piece of shaft (screwed and locked into the pivot) with a snap ring (I am a big fan of the Smalley type rings) and a Belleville washer might be a better way to go. ??? -- Lew
John Hill:
Looks nice Jason(?), my comment is to put a skirt on the green bit to increase the area that is resting on the red bit. Provided the tool tip is always within the area of the red bit the screw will be quite adequate, IMHO.
John
j45on:
Thanks for the feed back guys :bow:
Guess I'm going to have to order some metal now :thumbup:
Oooh and some carbide inserts as I don't have any insert tooling yet
75Plus:
Jason, A few months ago I made a ball turner for use on a 7 X 12 mini lathe. I am able to turn up to 45mm balls on that lathe. I also made another plate to fit the C4 lathe and am able, with a taller tool holder, to turn 55mm balls. The two halves cannot loosen as the tool is turned back and forth. You can find it here:
http://madmodder.net/index.php?topic=2938.0
I have sketches using Sketchup 6 that I could send you also.
Joe
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