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+--- Thread: 626 Mill Z Axis Feed Nut (/thread-842.html)
RE: 626 Mill Z Axis Feed Nut - Arbalest - 10-01-2012
Nice project John, and good pictures. Thanks for posting.
RE: 626 Mill Z Axis Feed Nut - krv3000 - 10-01-2012
is it dun yet
RE: 626 Mill Z Axis Feed Nut - doubleboost - 10-01-2012
Hi
Bob
In a word "no".
The thread looked good but it is not spot on
I learned a lot and i am going to re do it.
John
RE: 626 Mill Z Axis Feed Nut - stevec - 10-02-2012
John, I'd be curious to know, what's not "spot on" about it?
RE: 626 Mill Z Axis Feed Nut - Arbalest - 10-02-2012
Not wishing to hijack your thread John, but did you ever post a thread about the Riser for the column? I have a Warco variant that I'd be keen to raise maybe 75 - 100mm.
RE: 626 Mill Z Axis Feed Nut - doubleboost - 10-03-2012
(10-02-2012, 07:29 AM)Arbalest Wrote: Not wishing to hijack your thread John, but did you ever post a thread about the Riser for the column? I have a Warco variant that I'd be keen to raise maybe 75 - 100mm.
I have some pictures of the riser i will dig them out
John
RE: 626 Mill Z Axis Feed Nut - doubleboost - 10-03-2012
(10-02-2012, 07:22 AM)stevec Wrote: John, I'd be curious to know, what's not "spot on" about it?
The depth of thread should be half the pitch plus 10 thou
125 / 2 +10
This gives 72.5 thou
I machined the core register 75 thou smaller than the thread od
Instead of 75 per side
(the thread is only half depth)
John
RE: 626 Mill Z Axis Feed Nut - stevec - 10-03-2012
Thanks John. does that mean the root (bottom) of the thread is way narrower than the crest (top)?
RE: 626 Mill Z Axis Feed Nut - doubleboost - 10-03-2012
(10-03-2012, 07:26 AM)stevec Wrote: Thanks John. does that mean the root (bottom) of the thread is way narrower than the crest (top)?
The thread is not deep enough so the top will be to narrow in the groove
The root will be the width of the tool tip
I am going to do it again (i will try and do a bit of video)
John
RE: 626 Mill Z Axis Feed Nut - stevec - 10-03-2012
Are the root and the crest not supposed to be the same minus the required clearances?