Radius turning fixture

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Very nice you have drawings, looks like it does a great job too. Very nice work, thx for sharing.
 
Gday Bruce.
I have drawings based on mounting to a typical Real Bull mini lathe.
I use Mastercam as a CAD although it is intended for CAD/CAM.
I can convert to DXF if you would like me to.Not sure if the 3D aspect of the
drawing would work,depends on your converter.


John
Spain.
 
Looks quite similar to mine except I put a large bearing race in it.
 
Why do we have to sign in to google plus to view. Can't we do anything anymore without having another account?
 
There is bearing/bushing on the underside,also the top part revolves in the inner
bore with 2 ball bearings used as a thrusts in the vee rail.
These balls can be adjusted by 2 set (grub) screws for tension.

As regards the google + photos,its a good way to send photo links.
I tried photobucket and it wanted (a) to backup all my photos in my computer
including the holiday snaps (yawn) and (b) it crashed with Picasa which
I like to down load pictures from my camera.So I had to restore my computer to an earlier date and remove Photobucket.
I am not an IT guy and I know enough computer knowledge to be dangerous.
maybe I did something wrong.
If you just send a request through Google + I will let you in to the files that
are for public display.
Thanks
John
 
Not had any problems with Photobucket, I just upload photos as required. This is my unit.

IMGP1743.jpg
 
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Very neat! I am learning soprano saxophone and wondered how they pulled the dents out (mine doesn't have any). I really like the tick marks on yours.

Thanks for sharing!
John.
 
Thanks Guys.

Nice looking tool,and thanks for the comments about the dent balls.
just for your info,to take out dents and there is more to it,but basically
you select a ball that just slips past the dent,then slowly expand the ball and
push and pull,expand and push and pull.
One end of the ball has a rod,the other a cable to go round the bends.I use a
Triumph motorbike speedo cable connected to the one end of the ball.
if you note one of the pictures shows a special expanding ball where I can
adjust the diameter whilst in the sax.
Best regards
John.
PS how do I reply to one person only if I receive several posts on the same subject.I am not savvy yet on this web site.
 
Very nice. I have also a ball turner. If you use it , Are you turning under the center or on the center. I have Always very much shatter & I turn on the center.

Barry
 
Barry.
With carbide, I like to be just below center.by .002"/.003" (0.06/0.09 mm)
It's just my personal choice.
For the chatter problem,check your cross slide gibs and the saddle strips for
excessive movement.
Regards
John
Spain
 
The picture of the balls is very neat. My daughter is a music major in college (clarinet) but her b/f is a trombone major. I assume the same technique can be used with any brass instrument.
 
For anybody's interest in engineering excellence I have
posted a link Ferress US.

< http://www.ferreestools.com/Cover-page54.pdf >

There tooling is first class and innovative.
I in the past have bought a few pieces from them,but the substantial increase in
the cost of postage from the US and the customs bureaucracy has stopped me.

Taking dents out of trombone slides and keeping parallel
is very difficult.

John
 
Hi John,
The repair tool cataloque was very educational. Friend of mine once told me about very expensive maintainance cost to keep a brass band going and that was 55 years ago when I was a 15 year old kid trying to make some music of a badly dented bugle.:wall: And all I got was some very sour notes and an out of breath giddy kid.:hDe:
 
I would like to make one of these but I don't have a mill. I have a design though but I would still need to machine the end of a piece of round bar to accept a diamond shaped carbide insert.
 
Could be a little tricky without a mill.
Send a drawing of what you need,maybe we could help you.
 
Here is a photo. The part will be press fitted onto a bar. The slot it rides in will be two pieces of bar stock bolted to the base. But for this piece imagine taking a vnmg insert and pressing it into the end of a bar of clay. That's what I want, but in steel and not so mushy looking cause you know how clay can get when you press things into it. But I digress.

DSC_0291.jpg
 
I think if the piece was made the same diameter as the longest dimension it would be best. I can then grind and file it and turn it on the lathe so that the insert is supported but will have clearance. Anyway, if someone wants to tackle this thing pm me. I have tools with crappy plastic knobs and brass stock just waiting to replace them.
 
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