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Cutting Cowlboard for door panels.
Posted: Tue Jun 10, 2025 5:43 pm
by WILD BILL
I've got a couple door panels to reproduce for a customer. I have the cowlboard and I'm ready to get started on it but figured I'd ask what you guys have found worked best for cutting this stuff. I't the .100 stuff from Miami Corp so not really that thick.
I'm sure my Ginger's would do it but don't want to abuse them
Re: Cutting Cowlboard for door panels.
Posted: Tue Jun 10, 2025 9:13 pm
by Ron Henningsen
Some time ago I posted with pictures (but I can't find the post) how I cut these boards. I use a sheet metal cutter that consists of two fixed outer jaws and a inner cutter between them that goes up and down. This type of cutter removes about 1/4" of material but is very accurate in following lines plus it leaves a very clean edge on the cut material. These cutters are readly available on-line and from of course Harbor Freight but I have found that a better quality unit cuts smoother and more accurate.
Re: Cutting Cowlboard for door panels.
Posted: Tue Jun 10, 2025 10:37 pm
by WILD BILL
The tool your referring to is called a pneumatic sheet metal nibbler. (although I have seen electric ones)
Not only do I know them I think I own one although it's in my tool box that is still at my old job. Never would have thought to try that.
Re: Cutting Cowlboard for door panels.
Posted: Wed Jun 11, 2025 2:44 am
by Ron Henningsen
Re: Cutting Cowlboard for door panels.
Posted: Wed Jun 11, 2025 5:34 pm
by WILD BILL
Thanks. I picked up a Bauer off the clearance table for $45 and it works like a dream. If it takes a dump I look into a better quality one but this will get the job done for now.
Re: Cutting Cowlboard for door panels.
Posted: Thu Jun 12, 2025 3:23 am
by Ron Henningsen
Glad to help.
Re: Cutting Cowlboard for door panels.
Posted: Thu Jun 12, 2025 3:56 pm
by WILD BILL
SO I thought I'd expand on this. I had the need to cut some holes in this board so I ordered a leather hole punch kit from Amazon
https://www.amazon.com/Senrog-Gasket-Le ... a_hp_atf_d
It worked a lot better then expected.
To cut the door handle out I simply punched each corner then connected the tangent points of each with a sharp razor blade using a straight edge as a guide.

Re: Cutting Cowlboard for door panels.
Posted: Sat Jun 14, 2025 4:13 pm
by Ron Henningsen
Same tool but a different name is a gasket hole punch set. Take the leather name off the tool and it seems to cost less. If you didn't figure it out yet the tool works best if you do it over a piece of wood.
Re: Cutting Cowlboard for door panels.
Posted: Sat Jun 14, 2025 11:54 pm
by Rhonda
I saw a tool battery operated ,on a utube , he was using to cut thin metal roof material I don't know what he called it , but it cut smooth and even.