Duroid

metal-ica · Aug 24, 2021

I got a request to cut .020" thick duroid. It's a thin laminated pcb that comes in 12" x 18" panels.

Pieces cut to .020 x .060 (+/- .0015) with no burs, lifting, or peeling.

What's the process for this?

partsproduction · Aug 24, 2021

I wonder if you can stack a bunch of blanks and mill them with a sharp 2 flute carbide end mill?

Ron Hofer · Aug 24, 2021

Wasn't Duroid Garry Moore's sidekick way back when?

CalG · Aug 24, 2021

stick the sheet down to a backer, cover with a waster, saw with a $100K dicing saw.

Good luck. You will need lots.

You are going to require optical methods to confirm the physical requirements.

A comparator or toolmakers microscope at the minimum.

newtonsapple · Aug 24, 2021

Get it laser cut, google “laser cut duroid” and you will find a bunch of options.

The manufacture probably has guidance for PCB routing machines, but the ask the laser guys first.

Otherwise make a set of teeth like soft jaws. The teeth are .050” wide. Mount a strip on edge, mill down to the .020” dimension. Then run a tiny mill or routing bit between the teeth to do the .060”. Clean everything, slightly loosen and pick out with tweezers.

upthebikes · Aug 25, 2021

CalG is right. Dicing saw, or other very high speed spindle with a diamond tipped slitting saw. A high speed wire saw will also work. Without either of those, send it out. Laser works too, but you have to use an outfit that specializes in thin pcb stuff or else the edges will curl a few thou out of your spec.

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