Author Topic: Making tools to make tools: Yoke style radius cutter.  (Read 5361 times)

Offline NeoTech

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Making tools to make tools: Yoke style radius cutter.
« on: August 08, 2013, 04:08:59 PM »
So i need to cut som rollers to be able to bend som tubing to be able to make the frame for my bandsaw project.. Oh well enough. ..

I wanna make a yoke styled radius cutter mainly cause i find them more versatile then the "dreamcutter" and the other weird ball cutter..

But i wonder if the yoke frame would be made out of aluminium.. And if not, could i cast a frame with embedded steelrods for support (i would heat bend som rod and put in the mold).

Or do i have to go the 20mm plate route and grind the shapes. *tedious*
Machinery: Optimum D320x920, Optimum BF20L, Aciera F3. -- I have not failed. I've just found 10,000 ways that won't work. http://www.roughedge.se/blogg/

Offline BillTodd

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Re: Making tools to make tools: Yoke style radius cutter.
« Reply #1 on: August 08, 2013, 05:05:11 PM »
Aluminium would probably work fine. There is not too much stress on the cutter while taking light cuts (typical of radius cutting)

FWIW I machined rollers for my brothers pipe bender using this fairly simple rig:




« Last Edit: August 08, 2013, 06:27:01 PM by dsquire »
Bill

Offline NeoTech

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Re: Making tools to make tools: Yoke style radius cutter.
« Reply #2 on: August 08, 2013, 05:22:03 PM »
I see.. that looks .. sketchy but if it works it works!. =)

I thought i would make something that hold the cutting road in a bow, and then had a handle to turn the toolbit. But well then i make it out of aluminium and press brass bushings in it.. Sweet. =)

thanks.
Machinery: Optimum D320x920, Optimum BF20L, Aciera F3. -- I have not failed. I've just found 10,000 ways that won't work. http://www.roughedge.se/blogg/

Offline m_kilde

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Re: Making tools to make tools: Yoke style radius cutter.
« Reply #3 on: August 13, 2013, 07:01:51 AM »
BillTodd

That looks as a simple and fast way to produce internal round shape, thanks for sharing this video, will keep this in mind for future work.

 :thumbup:

Offline NeoTech

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Re: Making tools to make tools: Yoke style radius cutter.
« Reply #4 on: October 19, 2013, 04:46:16 PM »
Been noodling with making my radius turner.. Im going with the yoke style.. I hade a piece of 20mm S355J2 plate lying around so i thought it was a good start.. and a piece of coldrawn tubing..

So for so good

Note, this is the progress for like 2 months while doing other stuff as well.. Idea is to put somekind of thrust bearing in the bottom and the top and use somekind of thread/bolt to get it to fix in the lower poistion and let it float in the upper... I dont know really i make as i go along..
Machinery: Optimum D320x920, Optimum BF20L, Aciera F3. -- I have not failed. I've just found 10,000 ways that won't work. http://www.roughedge.se/blogg/

Offline mattinker

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Re: Making tools to make tools: Yoke style radius cutter.
« Reply #5 on: October 19, 2013, 06:15:20 PM »
NeoTech,

I like the road your going down, it sounds very familiar, I make things to make things. I'll be following you!

Regards, Matthew

Offline Meldonmech

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Re: Making tools to make tools: Yoke style radius cutter.
« Reply #6 on: November 25, 2013, 02:12:58 PM »
   
  I find designing and making my own tools and workshop equipment most rewarding.

                                                                                                                                             Cheers  David