Author Topic: flip up toolholder for screwcutting (Read 10788 times)

wheeltapper · « **on:** June 07, 2011, 11:32:39 AM »

Hi
I read all the posts about this gadget and always fancied making one but never did.
the latest issue of Model Engineers Workshop had an article about them so I decided to have a go.

the back

flipped up

I changed the back slightly to a bar that fits straight into my QCTP to cut down on overhang.

And blow me it really works

It's one thing to watch a video and quite another to watch your own one cutting then sliding back to the start.

bloody brilliant idea!

Roy

DaveH · « **Reply #1 on:** June 07, 2011, 12:29:40 PM »

Roy,

Looks good

and like you say it works

Well made

Was it your design or bit of this and that?

Just to give me an idea of the size - What size is the HSS tool bit?

It is a really clever idea.

DaveH

wheeltapper · « **Reply #2 on:** June 07, 2011, 12:39:35 PM »

Its not my design, various types have been around on here for some time, I just slightly modded the version in MEW.

the tool is 8mm sq, length of the moving section is 55mm and the angle base is 50 mm.

Roy

DaveH · « **Reply #3 on:** June 07, 2011, 12:51:27 PM »

Thanks Roy,

I really fancy one of these - time I had a go.

DaveH

dsquire · « **Reply #4 on:** June 07, 2011, 01:17:23 PM »

Guys

Rather than reinvent the wheel refer to this thread started by Bogs
http://madmodder.net/index.php?topic=2323.msg24413#msg24413

Cheers

Don

wheeltapper · « **Reply #5 on:** June 07, 2011, 02:20:04 PM »

I said it had been around for a while.
Mike Cox is the author of the article in MEW.

Roy

PekkaNF · « **Reply #6 on:** June 07, 2011, 03:30:54 PM »

Haven't got newest MEW yet and it didn't show on the site either.

This is pretty simple design compared to many retractable tool holders. How does this design compare with Martin Cleeves Design "The rectratable and swing clear lathe tool holder" (in WSP#3) . I mean not stating the obvious:
* Flip is more simple
* Cleeve's has internal threading/booring tool option
* Flip is easy to adapt to QCTP, Cleeve's basic design takes a little more effort

Pekka

andyf · « **Reply #7 on:** June 07, 2011, 05:14:01 PM »

Pekka, I think the advantage it has over Cleeve's design is that you don't need to retract it at the end and advance it at the beginning of each cutting pass. The disadvantage compared to Cleeve's device is that it won't work on internal threads, as you say.

It is a lot simpler and easier to make than Cleve's design, though.

Roy, I know Mike Cox. He says MEW have been sitting on this and other articles of his for months, and he is surprised to see that they have suddenly put six of them into the current issue.

Andy

No1_sonuk · « **Reply #8 on:** June 07, 2011, 05:49:56 PM »

Quote from: dsquire on June 07, 2011, 01:17:23 PM

Guys

Rather than reinvent the wheel refer to this thread started by Bogs
http://madmodder.net/index.php?topic=2323.msg24413#msg24413

Well worth reading that thread.
BTW, Bogs does state at the beginning it's from an original idea by Mike Cox...

Nelson92757 · « **Reply #9 on:** June 26, 2011, 11:08:10 PM »

Roy
I looked at Bogs tool holder and both are just splendid. When I saw yours I thought I seen that action somewhere else. Then it accrued to me. A "clapper box" on a shaper. The tool cuts in the forward stroke and raises slightly on the return stroke. I must say that both designs are brilliant. I might take my hand at making on for myself. Again I enjoyed the threads.
Nelson Collar

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