View Full Version : Small Clamp/Vice Actuated Punch/Die

02-05-2016, 05:26 PM
Hi all,

A local guitar tech I've done bits and pieces for in the past got in touch recently to see if I could make him a punch/die for knocking out small plastic parts (in ABS). I turned down the project (I know nothing about punches/dies and expected the tolerances to be very high to get anything that would stand a chance of working) and recommended that he post an RFQ up here, which he did. I got in touch with him after a few weeks to see how the tool came out - turns out that getting it made was going to be too expensive to justify for the relatively little use it would get. Being a hobbyist with nothing to lose but a weekend, I thought I'd have a go at it, here are the results:


I thought that a bar clamp would be enough to work the punch and it was for one of the plastics I tested it on, but I had to use a larger medium sized G-clamp to find enough force to punch through the ABS. Quite happy with how this came out - it is a bit of a faff to use and it's a bit sloppier than something you'd get made professionally, but hey - it's made and it'll hopefully get a bit of use. If I made another then I'd probably look into running a ball-nose inside the profile of the punch and 'hollowing' it out a bit so as to concentrate the cutting force along the edge of the punch as opposed to across its flat surface - makes sense and would almost certainly make the punching through a lot easier, but could have a detrimental effect on the finish. Any hints and tips..?


(EDIT: Plates were cut from 4mm 7075(T6) and the punch was cut from what I believe to be 2014)

Clive S
02-05-2016, 05:34 PM
As usual Wal you always come up with an interesting project very nice.:thumsup::thumsup:

02-05-2016, 05:43 PM
Cheers Clive,

It's worth having a go, isn't it?! I reckon I'll be sitting down to re-design all of my axis based around profile-rail soon enough, could do with a bit of extra rigidity - will look at enlarging the x-axis travel too. Hopefully catch up with you soon!


03-05-2016, 09:10 AM
Very nice, thanks for sharing :)

03-05-2016, 09:30 AM
Awesome Wal - I know where to come to get a new truss rod cover for my Les Paul now :)

BTW - where do you get your 7075 from?

03-05-2016, 11:27 AM
Thanks guys.

>where do you get your 7075 from?

I've used metalweb (http://www.metalweb.co.uk) a few times now - they have a depot not far from me. It's not cheap - IIRC I paid about 80 for 5 sheets of 200x500x4mm. Lovely stuff, though. Machines pretty well and has a Brinell Hardness rating of 150 (compared to 90-odd for 6082T6). Nice work on those guitar bodies, BTW - looking really good.


03-05-2016, 03:33 PM
Nice Job!

04-05-2016, 03:36 PM
Nice Wal, always top notch the bits you do!

04-05-2016, 06:34 PM
Cheers Neil..! :thumsup: