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'Precision' Clamping squares.

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Peri

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About a year ago I impulse ordered a couple of clamping squares from Rutlands.

They've sat on a shelf since they arrived, but I grabbed them recently to help with my latest project.

Half way through glue up and things aren't coming together like I expect.

Heres why.

Clamp 1


Clamp 2


Not sure they hit the advertised “Accurate to 0.01mm Per 10mm Squareness” :)

Strangely, the inside angles are dead on - which sort of rules out them being bent due to an applied force.
 

Droogs

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For Rutlands kit, those clamps are indeed very precise. Be grateful you must have got a Wednesday made set rather than a Friday banana :p
 

Rorschach

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You are using them the wrong way around, the inside angles are square because they are the surface you are meant to use, hence the cut out at the internal intersection.

EDIT: Just checked the Rutlands site, they claim they can be used either way, so that is rather poor. On the up side though, you can use them effectively one way.
 

MikeK

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I have the Woodpeckers clamping squares and never had a problem with them. However, your post made me curious, so I checked the squareness of my set. I am happy to report they are perfect, both inside and out, which is good since Woodpeckers states they can be used in both orientations.
 

Peri

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I've tried throwing them away 3 times but they keep coming back.

Luckily I can mill them square at work - but it's not something you should have to do.
 

marcros

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That appeared on my suggestions today too!
 

Just4Fun

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I made a couple from some offcuts. 2 sides joined with a dovetail plus a corner brace with M&Ts into the sides. Strong and square but the corner brace means I can only use the outside of them.
 
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