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Gallery, Projects and General => Project Logs => Topic started by: mhh on June 28, 2011, 03:42:11 PM

Title: Screwcutting
Post by: mhh on June 28, 2011, 03:42:11 PM

Just a little screwcutting. M39x4 on a freaking 3000mm workpiece!  :D It took a long time since i was never over 100rpms and did everything with toolbit but it looked great when it was finished

Now that looks a little dangerous!
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240190.jpg)

But as long as you keep your attention on everything and besides that uses your head everything will be just fine!
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240191.jpg)
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240187.jpg)
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240186.jpg)
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240185.jpg)
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240182.jpg)
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240181.jpg)
(http://i799.photobucket.com/albums/yy272/mhh_photo/P6240180.jpg)

Title: Re: Screwcutting
Post by: Stilldrillin on June 28, 2011, 03:48:56 PM

       :bugeye:

I'd have preferred to have that other end restrained/ supported!

David D

Title: Re: Screwcutting
Post by: John Stevenson on June 28, 2011, 03:58:11 PM

Should have turned the mill vise thru 90 and nailed a quick box up out of pallet wood to support the end in the vise.
Bit of grease around the wood and you would be good to go for about 7,000 rpm

John S.

Title: Re: Screwcutting
Post by: mhh on June 28, 2011, 04:01:08 PM

Had that same thought but increased the speed bit by bit and there was absolutely no problems, the workpiece was nice and straight, no vibration, good snug fit in the spindle and a strong chuck was enough.

Title: Re: Screwcutting
Post by: John Stevenson on June 28, 2011, 04:17:33 PM

Is that one of those lathes with the sexy tailstock ?

John S

Title: Re: Screwcutting
Post by: mhh on June 28, 2011, 04:30:08 PM

If by sexy you mean the large handles then yes  :D It's a Cazeneuve HB500 lovely machine! Can't seem to find a picture of the tailstock. But with fine feed and follower feed I would call it sexy!  :D

Title: Re: Screwcutting
Post by: dickda1 on June 28, 2011, 04:34:44 PM

mhh,

Just curious, what will that rod be used for?

-Dick

Title: Re: Screwcutting
Post by: BillTodd on June 28, 2011, 04:43:31 PM

Quote from: John Stevenson on June 28, 2011, 03:58:11 PM

Should have turned the mill vise thru 90 and nailed a quick box up out of pallet wood to support the end in the vise.
Bit of grease around the wood and you would be good to go for about 7,000 rpm

John S.

Wise words John. 

Even short wobbly overhangs can get out of shape in hurry!

BTW using a ER collet tapped (and taped) into the end of my lathe's spindle works quite well:

Title: Re: Screwcutting
Post by: doubleboost on June 28, 2011, 04:43:40 PM

I would have to poke a hole in the wall to do that  :( :( :( :(
Looks like a nice thread
John

Title: Re: Screwcutting
Post by: John Hill on June 28, 2011, 09:30:42 PM

I wonder if I could put my lathe on wheels, then I could wheel it outside if I ever need to turn any long stuff. :scratch:

Title: Re: Screwcutting
Post by: No1_sonuk on June 29, 2011, 04:21:00 AM

Quote from: John Hill on June 28, 2011, 09:30:42 PM

I wonder if I could put my lathe on wheels, then I could wheel it outside if I ever need to turn any long stuff. :scratch:

I'd have thought a hole in the wall would be technically easier...  :thumbup: