Author Topic: Making your own carbide tool holders (Read 16501 times)

45auto · « **on:** February 11, 2012, 08:17:56 AM »

I recently bought several boxes of the 3/8 triangular carbide inserts, 1/8" thick, .148 or so hole, and had no tool holders for them..I was kinda searching for 1/2" holders, and came across an article on how to make them.. It's in the Metalworking Drop Box retired files, from 1998, and written by Ted Edwards.. I printed them off, took them to the shop and in short order made 4 of them from some 1/2" key stock.. Short order to me was a day in the shop.. I pretty much went with the drawings.. even though I thought the 5 degree angle was a little excessive..
What a treat.. I made 2 lefts and 2 rights, and am very pleased. They cut like "butta" ... Next on the list is a bunch of weird carbide inserts that I've been storing..
First, here's the main page for Dropbox, then a gif for the tool holder, then the instructions on how to make them..
Hope this helps some of you..
As an aside, the files will give you years of good reading
Mike in sunny Lima
metalworking.com http://metalworking.com/
Drop box index http://metalworking.com/dropbox/
Gif... http://metalworking.com/dropbox/_1998_retired_files/toolhold.gif
instructions http://metalworking.com/dropbox/_1998_retired_files/toolhold.txt

Paddy OFernichur · « **Reply #1 on:** February 11, 2012, 12:28:15 PM »

What type of inserts are they? Got any nomenclature off the box?

The most-common problem I see with homemade holders is that some get the angles wrong. Since yours "cut like butta", two things come to mind:

1. You got the angles right for the inserts, otherwise they wouldn't work at all (or at least not like you say they do.)
2. No pictures means it never happened!

DaveH · « **Reply #2 on:** February 11, 2012, 12:57:12 PM »

45auto. Mike

Hello and welcome to madmodder

Come on don't be shy give us a quick hello in the Intro section. I'm sure there are a lot of member that would like to say hello.

DaveH

45auto · « **Reply #3 on:** February 11, 2012, 01:15:55 PM »

Ha!
Inserts I made the holders for are
Tnma-322b
Tnmp-321e
Tt322
Tnmg 323
And a square holder I made this morning
Snmg-323b. The triangle inserts I cut at a 5degree angle, and on the square one, I tried a 3degreethis one is more height critical.
Pics coming up
http://i47.photobucket.com/albums/f154/Reames/99ae4053.jpg

http://i47.photobucket.com/albums/f154/Reames/d2cb0156.jpg
Let's see if these photos go..

Been a member for a while, just never had anything useful to contribute..
Mike

Paddy OFernichur · « **Reply #4 on:** February 11, 2012, 06:53:33 PM »

I notice the big socket head cap screws holding the inserts onto the holders, and it looks like most (if not all) have only one edge of the insert seated. Most high quality commercially made holders envelop two sides, and use and eccentric cam in the hole with a clamp over the top to keep the insert secure.

You're fine as long as you don't push too hard. How much HP and speed does your lathe put out?

Country Bubba · « **Reply #5 on:** February 11, 2012, 07:04:43 PM »

Many years ago, I also made my own holders like this. Based on the original instructions, I used "flat head" socket headed screws. The problem was the wrench size was so small that you quickly either stripped out the socket or buggered the wrench.
I then switched to the standard screw as shown and have had no problems.
I use mine on an Atlas/Craftsman 12" lathe and only had support issues when dealing with interrupted cuts. And we all know that carbide doesn't like that anyhow!
The bigger triangle type inserts don't seem to complain about only being seated on one edge.
Been using mine for about 10 years or so.

45auto · « **Reply #6 on:** February 11, 2012, 09:59:26 PM »

Yea, I know that commercial ones have a better holding system, but I generally don't have to take heavy cuts.... My Clausing is a 2 hp 3 phase with a VFD, and I generally set the speeds and feed for what I'm making at the moment...
The dimensions call for a couple thou of squeeze to firmly seat the insert into the supporting edge.
Probably could have done better, but they work, took not too much time,and they're cheap.
Mike

DaveH · « **Reply #7 on:** February 11, 2012, 10:20:27 PM »

Mike,

There always the "pleasure" that you made them.

DaveH

Rob.Wilson · « **Reply #8 on:** February 12, 2012, 05:06:29 AM »

Nice going Mike

I have a couple of boxes of tip with no holder ,,, may as well follow your lead and make one

A bit

but whats those gun looking thinks top of shot

they look interesting

Cheers Rob

45auto · « **Reply #9 on:** February 12, 2012, 07:32:46 AM »

Thanks,
Those are outside lock ball reservoir pistols I made.. They use Co2, and are large bore, 30 cal and a 45
Not quite finished, they need sights and finish on the wood.........

Mike

DaveH · « **Reply #10 on:** February 12, 2012, 08:18:23 AM »

Quote from: 45auto on February 12, 2012, 07:32:46 AM

Thanks,
Those are outside lock ball reservoir pistols I made.. They use Co2, and are large bore, 30 cal and a 45
Not quite finished, they need sights and finish on the wood.........
Mike

So Mike,

Are you going to show us

- we like pics

DaveH

45auto · « **Reply #11 on:** February 12, 2012, 08:33:46 AM »

Not sure if this is the right place to post this, but here is a couple of them..
It's a 30 cal tap loader, ball reservoir CO2 pistol. Made 2, other is a 45 in a different stock, a more traditional muzzle loader type. I make a few a year, trying for a different style each time..I make them to please myself, occasionally selling them..

Sorry for the large photos, not sure how to cut them down..
Mike

doubleboost · « **Reply #12 on:** February 12, 2012, 10:50:14 AM »

Hi
Mike
Tip holders are good

Pistols are fantastic

John

jgroom · « **Reply #13 on:** February 12, 2012, 12:05:48 PM »

Umm, yea what John said!

Cheers

Jeff

Rob.Wilson · « **Reply #14 on:** February 12, 2012, 03:00:00 PM »

cracking pistols Mike

me like

Thanks for showing ,,,,,,,, any chance of a build thread

Rob

45auto · « **Reply #15 on:** February 12, 2012, 06:15:50 PM »

I do not have any plans, and I generally write down very little.. I was always gonna make a photo diary of the build, but keep forgetting..
Mike

andyf · « **Reply #16 on:** February 12, 2012, 06:16:34 PM »

Nice workmanship, Mike.

If you made those spherical CO2 reservoirs yourself, how on earth did you manage it?

Andy

45auto · « **Reply #17 on:** February 12, 2012, 07:27:55 PM »

I was able to find hemispheres with a .135 wall, I made a threaded insert, heliarced them together and tested them to 4500psi.. kinda time consuming, but worth the effort
Mike

DaveH · « **Reply #18 on:** February 12, 2012, 08:13:14 PM »

Mike,

Pistols are great,

Nicely made

DaveH

Dean W · « **Reply #19 on:** February 13, 2012, 01:45:19 AM »

Mike, that's a great way to be able to use surplus and orphan inserts, and it didn't cost you your shootin' arm, either.
Thanks for showing the pistols, and explaining the ball reservoirs. That was going to be my first question as I read
down through this thread.
You did a great job on the pistols! Have you tried any of them over chrono screens yet?

Dean

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Author Topic: Making your own carbide tool holders (Read 16501 times)

Rob.Wilson

Rob.Wilson