Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Machining

SFT Search:   
Reply
 
Thread Tools Display Modes
  #11  
Old 02-13-2012, 03:55 PM
Corm Corm is offline
Member
 
Join Date: Jun 2004
Location: Northern Vt
Posts: 109
Default

Quote:
Originally Posted by PixMan View Post
I wasn't thinking of using a ball end mill, but a regular 1-1/2" end mill as side cutting. It may require a long holder, but a 1-1/2" end mill with a 1-1/4" Weldon shank in a holder might be long enough.

If you don't have the stuff, throw the part into your car and come on down to MA and we'll do it up in about an hour.
Now there's something I hadn't thought of! I have a couple of 1.5" end mills. Makes perfect sense, I can't believe I didn't think of that myself. Duh! I can turn the OD in my lathe, drill and bore the center hole, then mount it on my ro-tab.

I think I like that idea better than doing the whole job in my lathe. Now I just need to convince SWMBO that I NEED this die, so I can go get the steel I need.

Corm
Reply With Quote
  #12  
Old 02-13-2012, 03:59 PM
Corm Corm is offline
Member
 
Join Date: Jun 2004
Location: Northern Vt
Posts: 109
Default

Quote:
Originally Posted by GWIZ View Post
As in Pixman post,
If you want to be slow and cheap, a fly-cutter set at 1.5 dia.

Do the 'Kellering' in the lathe first, may get away with making a 3/4" radius (not a full ball) on a tool-bit ( slowest spindle rpm). finish in the mill if needed.
Using a fly cutter is another good idea I hadn't thought of. Like you said, cheap. I like that! Whether I get this done slowly or quickly, really doesn't matter. I'm mostly retired, so I don't do much of anything in a hurry anymore.

Corm
Reply With Quote
  #13  
Old 02-13-2012, 06:05 PM
Corm Corm is offline
Member
 
Join Date: Jun 2004
Location: Northern Vt
Posts: 109
Default

Just want to thank you folks for your help. It's easy to see that I am a rank rookie, so in need of a lot of help.

I read this forum nearly every day (and have learned a bunch), but don't often contribute because I am so much of a rookie. Hopefully someday I'll be in a position to return some of your help.

Corm
Reply With Quote
  #14  
Old 02-13-2012, 07:55 PM
aametalmaster aametalmaster is offline
Senior Member
 
Join Date: Jan 2011
Location: Salem Ohio
Posts: 636
Cool

I built a ball turner/radius turner just for making pipe dies. Run your lathe in backgear that dia will eat cutters if run fast. Make yourself a tool like this for turning the radius. It isn't mine but a good concept...Bob
Attached Thumbnails
Click image for larger version

Name:	radiustool.jpg
Views:	158
Size:	35.4 KB
ID:	87399   Click image for larger version

Name:	TubingRollerRings08.jpg
Views:	156
Size:	59.2 KB
ID:	87400   Click image for larger version

Name:	tubingroller.jpg
Views:	150
Size:	29.4 KB
ID:	87401   Click image for larger version

Name:	tubebender.jpg
Views:	150
Size:	29.9 KB
ID:	87402  
__________________
Bob Wright
Metal Master Fab
Salem, Ohio Birthplace of the Silver and Deming Drill.
http://www.ceilingtrains.com
Miller MM185 with 185 SpoolMate
Reply With Quote
  #15  
Old 02-14-2012, 01:44 AM
Amigo Amigo is offline
Senior Member
 
Join Date: Feb 2009
Location: Central Indiana, U.S.A.
Posts: 328
Default

Corm:
Quote:
I can envision making a series of cuts with a regular bit, each cut going a little deeper towards the middle of the groove, from each side of the groove, and then maybe finishing it with some (a lot of) filing to smooth out the steps between the cuts. I believe that process is called 'Kellering'.
Just to avoiding confusing those who do not know, "kellering" is a form of tracer machining. A tracer follows a pattern or model, while a cutting tool (lathe or mill) does the material removal of the desired product by duplicating the path of the tracer. The position relationship of the tracer and cutter is usually fixed for X & Y, Z(depth) is usually adjustable.

For your desired product, a piece of split plastic pipe could serve as your model, mounted vertically on the lathe bed. A tracer could be firmly affixed to the compound to the right of the cutting tool. If the model is near perfectly vertical, the tracer need not be on the same height plane as the cutter.

On the other hand, first making a metal slug of the desired diameter, to serve as a "gage", plunge cutting with a groover/parting tool will get you purty close. Final touches could finished with half round files & emory cloth.

Always have a round end handle on a file used with running machinery.

Last edited by Amigo; 02-14-2012 at 01:51 AM. Reason: safety
Reply With Quote
  #16  
Old 02-14-2012, 06:36 AM
big job big job is offline
Member
 
Join Date: Jan 2010
Location: Mass.
Posts: 83
Default Low budget

Back in the 70s I got into dune buggys big time. As far as where I am I
dont think these were invented yet or I never saw one. So all I did was
to turn a piece of oak tree to the dia of my pipe inch &1/2 I then cut it
in two then bolted a steel plate on its flat back side, mounted that on a
log splitter with two VW rims that the pipe would roll on. I cant count how
many VW buggies we made, I mean they were real nice roll bars cages,
and that cheap idea never failed and all done with compound rest
Attached Thumbnails
Click image for larger version

Name:	radius turning.gif
Views:	120
Size:	6.8 KB
ID:	87436  
Reply With Quote
  #17  
Old 02-14-2012, 07:34 AM
Kbeitz Kbeitz is offline
Newbie
 
Join Date: Feb 2012
Location: Pa
Posts: 4
Default Two that I made...

Two that I made...
Attached Thumbnails
Click image for larger version

Name:	inside radius cutter .JPG
Views:	128
Size:	27.9 KB
ID:	87437   Click image for larger version

Name:	outside radius cutter .JPG
Views:	125
Size:	33.3 KB
ID:	87438  
Reply With Quote
  #18  
Old 02-14-2012, 05:44 PM
aametalmaster aametalmaster is offline
Senior Member
 
Join Date: Jan 2011
Location: Salem Ohio
Posts: 636
Cool

Heres mine. Its in ball turner mode in these pics just run it past center and it will do the radius...Bob
Attached Thumbnails
Click image for larger version

Name:	ball_turner1.jpg
Views:	111
Size:	36.5 KB
ID:	87454   Click image for larger version

Name:	big ball[1].jpg
Views:	114
Size:	38.6 KB
ID:	87455  
__________________
Bob Wright
Metal Master Fab
Salem, Ohio Birthplace of the Silver and Deming Drill.
http://www.ceilingtrains.com
Miller MM185 with 185 SpoolMate
Reply With Quote
  #19  
Old 02-15-2012, 07:38 AM
Corm Corm is offline
Member
 
Join Date: Jun 2004
Location: Northern Vt
Posts: 109
Default

Thanks for all your pictures folks. You've given me plenty of examples that I can use to make my own inside radius turner.

You folks are great. I was hoping for some advice regarding what I want to do. I got more than I expected, along with an offer from one of you guys to make the piece for me (wow!). This is why SFT is always my first stop whenever I log on to my computer!

Corm
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 09:46 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.