Plywood offcut wanted

[John Brown]

I was hoping to make one of these:
https://www.youtube.com/watch?v=zbTVWjoXuG4

but don't seem to be able to find a supplier of birch ply round these parts who sell anything other than whole sheets(or possibly half sheets). So I wondered if anyone local has a 600 by 600 by 12mm offcut, with one of the original right angles intact that I could buy.

 

[novocaine]

a decent flat piece of construction ply will be more than up to it for the base.

 

[petermillard]

a decent flat piece of construction ply will be more than up to it for the base.

+1 - or MDF, to be honest. Wickes do quarter-sheets of 12mm hardwood ply & MDF - not Birch, though, and not MR MDF.

Biggest offcut of 12mm Birch Ply that I don't have plans for right now is around 550 x 700 - you're welcome to that, if you can collect.

Cheers, Pete

 

[John Brown]

I was wondering about MDF. These Americans all seem to use birch ply for everything. Probably a lot cheaper over there.

 

[scholar]

There are various sellers on eBay that supply small sizes of birch ply. It is a relatively expensive (in £/sq ft terms) way to buy it, but useful if you just need a small piece.

Cheers

 

[John Brown]

OK, so I have bough a piece of 12mm MDF, 2' x 4'

The mitre jig in the linked youtube video is basically a large right angled triangle wit a slightly smaller on on top of it.
I uunderstand the principle that, as long as the right angle is accurate, mitres cut one each side should mate perfectly(or as good as, if too far out you'd still get a right angled joint, but the length of the diagonal cut would differ). It also seems to me that making sure the parallel sides of a picture frame are exactly the same length is equally important, and to that end I am trying to think of the simplest way of implementing an adjustable stop block on one side of the jig. The simplest solution I can think of would involve routing a stepped or v-shaped slot from the underside of the larger triangle, and using a screw and wingnut to secure a block. The drawback with this is that it would limit the length of the stock to around 2 feet. All the methods I've considered for extending this range seem over-complicated, so I wonder if any of you clever chaps have any useful hints.

Thanks in advance,

John

 

[gregmcateer]

I was wondering about MDF. These Americans all seem to use birch ply for everything. Probably a lot cheaper over there.

IIRC, mdf is not banned in the States, but regarded with quite some degree of caution.

 

[John Brown]

Apart from which, in that youtube video(I think) he talks about getting a 2 feet square piece of 1/2 inch ply for $6.99, which is about 4 or five pounds.
Didn't know that MDF was frowned upon in the states, though. They certainly seem to be OK with OSB.