Posts with threaded holes

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Jitt wrote: : 1/2 inch aluminum angle?

Thanks for the suggestion. Do you know of a variety which would have a series of pre-drilled tapped holes? The end holes holding the top and bottom plates would be problematic, too...

Regards, Mikko

I'm not sure I understand the geometry you are suggesting. :<

Could you, instead, use male-female standoffs -- stacked -- with the joints between adjacent standoffs used to hold "things"? E.g., (sideways):

I first encountered this type of construction in about 1950. It was already an old piece of homebrew amateur radio equipment and I was ten years old. Unfortunately, I dismantled it for parts and now there is little left of it.

I have always been on the lookout for a source of the brass square stock used for corner material. I will try a little harder now that you have reminded me. It is a technique that is hard to beat.

I usually slice off a piece of aluminum angle stock into angle brackets which I drill & tap using a milling machine. Even with the power saw and the milling machine it is cumbersome and slow.

Aluminum sheet and the brass squares are expensive to me but I will revisit the question for my own use. This time I have the machinery so I will construct fixtures to simplify the drilling & tapping.

My projects are usually pretty small so I will use both clad and unclad Circuit Board.

Thanks for the reminder on the prototype enclosures! John Ferrell W8CCW

Sheet metal screws? There doesn't have to be a fastener _at_ the corner.

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Back in the days (BC = Before CAD :-), I used to breadboard complete IC designs, and used spacers such as these...

female thread on one end, male on the other... to allow stacking of 1' x 1' PCB's, like these...

(This is only a cut-off piece... the originals were ~ 1' x 1' and featured pads for 48 16-pin DIL's ;-) ...Jim Thompson

Hey hey, I have been using those spacers the last two days.

greg

something like these gets close:

don't think threadet holes would be required, the screw should be able to tap its own thread in a slot of just the right size.

-Lasse

I used to take those breadboards thru airport security with nary a "Ho Hum". Now I doubt that I could do that _at_all_! ...Jim Thompson

Bigger systems (like rack-mounts) use punched steel channels and one just snaps captive nuts into any punch-hole that needs a connection. Smaller systems use aluminum angle, also punched with any convenient perforation pattern, and press-in threaded inserts (PEM nuts is one example). The smallest systems are with plastic snap fittings.

Threading a solid chunk of metal only makes sense if you are asking your technicians to make 'em in one-offs. There's too many steps for it to be economical (as you have noticed). Hand punches and threaded inserts are probably a good choice for you. You might also consider slotted posts and holding a PC board to them with tie-wraps.

snipped-for-privacy@fonz.dk wrote: : something like these gets close:

A very good lead, thanks Lasse. They even have a web store. The profiles are anodized, so it would be tough to make the enclosure rf tight - still pretty close to what I'd need.

Regards, Mikko

whit3rd wrote: : a connection. Smaller systems use aluminum angle, also : punched with any convenient perforation pattern, and press-in : threaded inserts (PEM nuts is one example). The smallest : systems are with plastic snap fittings.

Thanks, this sounds useful. Do you have an idea about a retailer? I've been scanning through Farnell, Mouser and other cataloques but such stuff did not catch my eye.

Regards, Mikko

John Ferrell wrote: : I first encountered this type of construction in about 1950. It was : already an old piece of homebrew amateur radio equipment and I was ten : years old. Unfortunately, I dismantled it for parts and now there is : little left of it.

I'm glad my inquiry triggered such nostalgia.

: My projects are usually pretty small so I will use both clad and : unclad Circuit Board.

That's one of the advantages of this and similar constructions: I can use our PCB milling machine to make the panels out of copperclad, including the front and back panels with accurately positioned cutouts.

Regards, Mikko

L/H860P127_1.html

how about something like this?

you'll have to drill and tap the ends, and find some inserts for the big non threaded holes

-Lasse

Here is a group of square stock in various sizes.

Meccano-like

s?gclid=3DC

Especially if it had a full prototype on it.

Be sure to also carry a dozen pack of modeling clay sticks for your kid. That'll surely put the icing on that cake. Run some wires into the box...

..a RED one and a GREEN one, and for grins, a BLACK (or WHITE) one...

snipped-for-privacy@fonz.dk wrote: : something like these gets close:

I got some profiles from their web store, but they added $200 handling and shipping on top of my order of a few tens of bucks...

Regards, Mikko