rear upright jig

[old_bill]

I'm having trouble finding a suitable metal ring that locates the 5 inch tube on the jig. I don't know anyone with a lathe who could turn a larger piece down to size. Can anyone help me out here?
Help would be greatly appreciated.

[londonsean69]

I'm making mine out of MDF and some big holesaws. It will be screwed through from the back of the template.

Might be an idea as it is only for 2 uses

Sean

[alga]

Wouldn't a triangular plate of the right size be sufficient to locate the tube?

[Bonzo]

4 Studs placed at 90 increments will do the job nicely.

Mark the inside radius of your tube onto your jig plate.

Divide the diameter of your chosen stud by two, Mark another circle on the jig plate, then drill & tap for the studs. 12, 3, 6, & 9 oclock.

If you don't have any suitable studs to hand, cut the head off of some bolts & then cut a slot in the top with a hacksaw or slitting disc in the grinder.
You'll be abe to screw the studs in with a flat screwdriver.

Long winded but it'll work fine

[RAYLEE29]

Jig!!
I didnt use a jig just set up on the table with some packing, the bottom half is basically self jigging anyway then marked up the top and held in place and tacked and checked.
I have been fabricating stuff for years though
Ray

[LeonN]

could you not bend the ring? 360 1 degree bends make a circle and all that.

[NEroadster]

Bill, I used the same plate to be used within the actual upright, I obtained three from 3GE (two for the uprights, one for the Jig) and it works a treat, just set up the upright parts in the Jig, possibly more expensive than the stud method but worked for me

[peter2482]

im working on making a folded sheetmetal jig, for the rear upright,

[thwang]

you would need a window tool to make the ring plus the pressbrake would have to bent true. i wouldnt use anything less than a hammerle press brake