cutting glass fibre PCB?

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1. Use a Dremel roto-tool with an abrasive rotary disk. Clean edges with fine sandpaper, or a fine-tooth file, or

2. (try this on a SCRAP piece of PCB....!) Score the PCB glass (and copper) several times with a sharp razor knife or box cutter. Place the scored line over a edge (a piece of wood, edge of a table, whatever) and snap the PCB along the score. Clean with fine sandpaper or a fine-tooth file.

Both methods have worked for me, for the last four decades.
 
In order of preference (assuming a board cutter isn't available):

1) sheet metal shear
2) Table saw with a blade suitable for plywood.
3) Band Saw
4) Dremel with a cutoff wheel
5) Sharp Xacto knife, scribe and break method in post #4

Items 1 through 3 are found in the shop class at many high schools. I take adult night wood shop classes just to use the shop. Otherwise, got school age kids?
 
2) Table saw with a blade suitable for plywood.

In my table saw, I'm using an abrasive blade, available at Lowes, etc. It's inexpensive and works very well, although like any abrasive cutting methods, edge cleanup with a sanding block is necessary. Use a disposable dust mask and goggles when using this method, as the dust really flies, as anyone using a table saw already knows.
 

ashok

Member
2002-06-06 4:43 am
3RS
I score the copper side with a sharpened box cutter blade. Use a steel rule as a guide. You will need to score it several times. Then turn over the board and score it again several times over the visible score you made earlier. ( for single side board !)
Then place the scored portion over a sharp edge like a table. Hold one corner of the free edge with your hand and slowly push it down ( maybe rock it a bit!). It will give way ( only that portion of the board). Then keep doing that along the cut bit by bit and you can break off the whole board. Sand paper the edge as it will be very rough. I do this all the time.
It helps to make the tip of the sharpened blade a bit flat when it tends to make a wider score than a sharp V shaped edge. This makes the breaking off process much easier.

One catch is that you need to cut the full length of a board and cannot cut , say 3x4 cm from a large board ! Maybe you can use a small router for that ?
 
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