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NotThamesWater

I need to make a sheet ripping guide for a circular saw - I made one from MDF, but the edge of the MDF is not straight, even through it's uncut.

I'm thinking of bolting a 1" box section aluminium tube as a fence - is that going to be straight, or are even machine metal things a bit bendy?

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Hovis in reply to @NotThamesWater

I made mine with the factory edge of an mdf sheet. I didn't consider if it would be straight or not. Maybe I should have... but all my cuts using it have been good.

What are you using to check the edges straightness, you sure it's straight?

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NotThamesWater in reply to @Hovis

What are you using to check the edges straightness, you sure it's straight?

Even eyeballing it looks iffy. I also offered up the edge of a 1m metal level, and a frikken laser level.

It's not the most egregious of curves, but over 2.4 meters it's noticeable.

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