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View Full Version : The worm turns: Part two



Evan
03-08-2004, 03:38 AM
"Evan
since you need to turn your own worm anyway, just turn a long worm, cut a length off to become a hobb, gash it, hardenen it and hone it and redo the wheel with the worm hobb. You can still use the blank you cut, the gashed worm can cut the worm wheel better than trying to grind it in, and it should come out beautiful.
The roughed out worm wheel should provide you an excellent basis to complete with the home made hobb."

Dave,

That is exactly what I did today. As per your suggestion it worked very well. Thank you, and thanks to the others on this BBS, John Stevenson, as well as many others that I continue to learn from.

I have been somewhat sidetracked by the arrival of the new mini lathe but will get on track to constructing the mini rotary table.

I hobbed the teeth using a hobb made as Dave suggested. I didn't bother to harden it since I was using steel to cut aluminum. It worked like a charm.

The Mark II hobbing and indexing fixture for the SB9:

http://vts.bc.ca/img/fixture1.jpg

The question of involute teeth is not an issue as the hobb generates the correct tooth profile. More to come later as this project progresses.

[This message has been edited by Evan (edited 03-08-2004).]

Mike W
03-08-2004, 04:07 AM
That is pretty slick Evan.

G.A. Ewen
03-08-2004, 10:12 AM
You realize of coarse that when you show this to your non machinists friends they won't believe that you made it. Looks factory made! (American factory)

wierdscience
03-08-2004, 11:10 PM
<font face="Verdana, Arial" size="2">Originally posted by G.A. Ewen:
You realize of coarse that when you show this to your non machinists friends they won't believe that you made it. Looks factory made! (American factory)</font>

Evan,I believe I would take that as an insult http://bbs.homeshopmachinist.net//biggrin.gif

Nice job as usual BTW!

G.A. Ewen
03-09-2004, 12:47 AM
"American Factory" is meant to be a Compliment. http://bbs.homeshopmachinist.net//biggrin.gif

"Asian Factory" Now that's an insult. http://bbs.homeshopmachinist.net//eek.gif

jfsmith
03-09-2004, 12:49 AM
Beautiful work!

Jerry

Paul Gauthier
03-09-2004, 12:15 PM
Evan:
Thats about the coolest thing I've ever seen.

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Paul G.