Fairly precise right angle brackets?

[Frank O]

For a project, I need to mount a 2 x 12 x 3/8" plate at 90 degrees in the center of a 5 x 5 x 3/8" plate. So if the 5 x 5 plate is flat on a table, the 2 x 12 plate stands straight up.

This doesn't need to be precise to aerospace specs, but I'd like to find right angle brackets with a 90-degree angle that's more accurate than what's sold at the local hardware chain. Is there something out there worth looking at?

Thanks,

Frank

 

[jwmelvin]

You could machine a slot in the base and a squared edge on the upright to register the parts, with screws up through the base plate into the upright.

You could machine a block to serve as the desired bracket.

You could buy a cheap angle plate.

 

[Shootymacshootface]

Bolted? Welded? Free standing?
The only precision angles you will find will be angle plates for machinists. You can bend or adjust just about anything to suit your needs.

 

[Bi11Hudson]

You could machine a slot in the base and a squared edge on the upright to register the parts, with screws up through the base plate into the upright.

A lot depends on how much side pressure the vertical plate must withstand. Any triangular, square, or arc having a 90* angle should work. An angle plate would be like using a howitzer for a flyswatter, but if room will allow it's the simplest solution. Next to it is a (square) block of some sort. Machinist blocks from China are fairly close to square, and cheap. Machining a triangle with a square corner, or an arc, probably would be the most "elegant" but cost in time would add up waiting to finish another project. But then there's the hobby, making a part to make a tool to finish another tool is what it's all about.

 

[Frank O]

A lot depends on how much side pressure the vertical plate must withstand. Any triangular, square, or arc having a 90* angle should work. An angle plate would be like using a howitzer for a flyswatter, but if room will allow it's the simplest solution. Next to it is a (square) block of some sort. Machinist blocks from China are fairly close to square, and cheap. Machining a triangle with a square corner, or an arc, probably would be the most "elegant" but cost in time would add up waiting to finish another project. But then there's the hobby, making a part to make a tool to finish another tool is what it's all about.

Thanks for these suggestions (and also to jwmelvin and shootymacshootface for theirs). Side pressure is a non-trivial concern. For this particular project, getting it done quickly outweighs elegance of solution. Any suggestions on cheap angle plates? The ones I'm seeing don't seem to be super discount.

 

[RJSakowski]

Thanks for these suggestions (and also to jwmelvin and shootymacshootface for theirs). Side pressure is a non-trivial concern. For this particular project, getting it done quickly outweighs elegance of solution. Any suggestions on cheap angle plates? The ones I'm seeing don't seem to be super discount.

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[Bi11Hudson]

I know this sounds silly, but I got to thinking about the difference between hardware store shelf brackets and the machinist's squares. I have seen angle iron reinforcements on mill components that approach the thickness of what you are dealing with. It seems to me that a piece of heavy angle should be close enough to 90 degrees to suit non-critical builds. If it works on bulldozers, it's heavy enough for me. . .

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