Ideas for tangential cutter tool holder?

burdickjp · Nov 23, 2014

I'm looking at putting together a tangential tool holder to suit Norton Patent style QCTP systems. Here's the design I've come up with:

A few disadvantages I can see right from the start: The front face of the holder has a 12 degree angle with respect to the back face. The slot for the holder has a similar 12 degree angle, but should be much easier to accomplish, as it's just a 0.25 inch slot.

Here's what I'm curious about: I'm looking at securing the tool in the slot with a large conical washer for a flat face M4 socket head cap screw. The slot will be ever so slightly less than the width of the tool. I don't think it will be enough, but I'm not sure.

I'm wondering if anyone has a better idea for accomplishing this.

Bill Gruby · Nov 24, 2014

If I understand you correctly you wish to know if the Conical washer and Screw will have enough holding capability to keep the tool from slipping down under load? If so, it's iffy. A standard flat washer (Fender Type) might be better. Try it with the Conical, if it doesn't hold use the other.

"Billy G"

Rick Leslie · Nov 24, 2014

I might be stated the obvious, but there's a good bit of info and designs on the tangential tool holder here. Here's the search results.
http://www.hobby-machinist.com/search.php?searchid=668713

I know that doesn't answer your original question. Like "Billy G" said, you'll just have to give it a try. Please show the project and document the progress, success/failure and mods. I think lots of folks are going to be using these sooner or later. Any info will help.

burdickjp · Nov 27, 2014

Here's where I'm at thus far with a clamping-style tool holder. I'm thinking one or the other sides needs a slot so that clamping the tool doesn't work against clamping to the post.

I think it'd be easy to add another tool to the other corners of the holder. Either 1/8 inch or round or whatever.

I'm trying to decide if it'd be advantageous to make the thickness of the holder such that I don't need to adjust height by moving the holder vertically on the post, since the tool can move vertically in the holder.

burdickjp · Nov 27, 2014

Here I've made the clamping mechanism different and added a round holder.

I think when I go to make something I'll start with round since it will be much easier to manufacture.
The rest of it honestly looks much more complicated than I want to attempt making. Way too many set ups and processes.

Bill Gruby · Nov 28, 2014

By the looks of those prints there is not enough metal holding the tool in place. Look at the others posted on this forum. Your tool looks like it will break right out of there.

"Billy G"

burdickjp · Nov 29, 2014

Bill Gruby said:
By the looks of those prints there is not enough metal holding the tool in place. Look at the others posted on this forum. Your tool looks like it will break right out of there

I don't think I could get it much smaller. That's set up to mill out the opening on either side with a 3 mm cutter.

I've seen a few similar designs, but I'm looking at another design which may cure that.

burdickjp · Nov 29, 2014

So here's a design which may be easier to manufacture than iteration 2, but stronger than the initial design. What do you think?

chuckorlando · Nov 29, 2014

How much meat is left on that clamp over the square tool?

Bill Gruby · Nov 29, 2014

burdickjp said:
So here's a design which may be easier to manufacture than iteration 2, but stronger than the initial design. What do you think?

That is much better. At least here there is something holding the tool.

"Billy G"

Welcome back Guest! Did you know you can mentor other members here at H-M? If not, please check out our Relaunch of Hobby Machinist Mentoring Program!

Ideas for tangential cutter tool holder?

burdickjp

Registered

Bill Gruby

Forum Guest

Rick Leslie

Active User

burdickjp

Registered

burdickjp

Registered

Bill Gruby

Forum Guest

burdickjp

Registered

burdickjp

Registered

chuckorlando

Registered

Bill Gruby

Forum Guest