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Simple corner clamping jig

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Simple corner clamping jig

Postby 9fingers » 16 Jun 2015, 12:30

This can't be original but I've not made any before. Triggered by seeing some near infinitely expensive plastic moulding from Rutlands the other day and the need to clamp up my barrister bookcase prototype.

I made 4 in about 1/4hr. I think the pictures tell it all really.

Image

Image

A small chamfer on the 90 degree corner helps stop any glue squeeze out from attaching the jig to the work.

They are a pleasure to use and easily made from scrap.

Oh yes and take the time to set/check your TS cuts perfectly square. In the process I noticed everyone of my woodworking try-squares was in error on one face of other. I ended up machining it truly square on the milling machine and marking it "OK". The others will get the treatment on a round-2-it basis.

Bob
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Re: Simple corner clamping jig

Postby chataigner » 16 Jun 2015, 12:37

I saw the Rutlands ones too - this is just as good and made from the scrap bin (or mine at least will be !).
Cheers !
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Re: Simple corner clamping jig

Postby Rod » 16 Jun 2015, 13:37

Nice idea

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Re: Simple corner clamping jig

Postby stephen.wood125 » 16 Jun 2015, 14:15

great idea!

Thanks, Bob!
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Re: Simple corner clamping jig

Postby Andyp » 16 Jun 2015, 15:08

Yep the best solutions are also the simplest and I wouldn't mind betting that yours are probably more accurate then the ones from Rutland.
cheers

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Re: Simple corner clamping jig

Postby 9fingers » 16 Jun 2015, 15:39

Andyp wrote:Yep the best solutions are also the simplest and I wouldn't mind betting that yours are probably more accurate then the ones from Rutland.



I quite expect the basic 90 degrees will be ok on the rutlands ones but the problem with any plastic moulding is that it needs a draft angle on the faces to get it out of the mould so the two faces that hold against the work might well have a slight angle on them which means a portion of the clamping force will go to distort the plastic and then the trouble can start.

I'm really please with these and should have made some ages ago. even after a perfect dry fit of parts most glue-ups turn stressful once the sticky stuff has been applied and these jigs can help reduce the degrees of freedom. Custom variants are easy enough to knock up even if you need a non right angle joint for a project.

Bob
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Re: Simple corner clamping jig

Postby TrimTheKing » 16 Jun 2015, 20:37

Very good.

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Re: Simple corner clamping jig

Postby stu » 16 Jun 2015, 21:20

Hi Bob - do you use the to hold everything square until you put on larger clamps?
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Re: Simple corner clamping jig

Postby 9fingers » 17 Jun 2015, 09:28

stu wrote:Hi Bob - do you use the to hold everything square until you put on larger clamps?

Hi Stu
I did a dry fit with pipe clamps holding the dovetail joints where I wanted them (these were cut a tad too deep :oops: ) and then fitted the corner jigs.
Then when I took it apart to apply glue, I left each corner jig in place with one clamp which made life even easier on re-assembly. I had a base and two ends firmly clamped at 90 degrees and then could add the top only having to check the depth of the DTs
These jigs avoid the need for any diagonal persuaders which for me always seem to get is the way of the other clamps.

Will we see this sort of jig in use in a local "pro" shop in future maybe?

Bob
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Re: Simple corner clamping jig

Postby Commander » 10 Jul 2015, 12:03

I really like that! Nice ans simple and effective! What material did you make them from?
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Re: Simple corner clamping jig

Postby 9fingers » 10 Jul 2015, 13:29

Thanks Erich
They are made from offcuts of MRMDF 18 mm thick but most other material would be fine.


HTH

Bob
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Re: Simple corner clamping jig

Postby Commander » 13 Jul 2015, 19:41

I will make a note of that!
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