Searching for the perfect standoff or quickie fastener, or stud
Searching for the perfect standoff or quickie fastener, or stud
(OP)
Hello folks, I'm trying to save on some weldments in a structure. In fact, the structure has 38 elements X 5 units X 6 welds per element = 1140 welds! A steel disk is welded 3/8" away from a plate with a port hole, on 3 nuts used as spacers. Welder must tack the nut in place then the disk. 190 disks makes for welders going postal.
What we need is a pop-in stand-off or something. Since the plate and disks are CNC plasma cut, no problem to make extra holes. Holes are 7/16" so 3/8" to 1/2" would work. Plates are all 1/4". Solution is mild cyanide (1%), mostly water - but maybe a thin metal clip would work. I'd love to find a plastic stud with mushroom head that would pop into the holes, then accept the disk.
http:// files.engi neering.co m/getfile. aspx?folde r=0ee079f0 -3e9b-4eba -b6a1-f1d5 b83d6ab8&a mp;file=ST ANDOFF_EXA MPLE_2.jpg
http: //files.en gineering. com/getfil e.aspx?fol der=19a0db 2c-9ec2-4d b4-b7f2-fe 25f4a8719a &file= STANDOFF_E XAMPLE.jpg
What we need is a pop-in stand-off or something. Since the plate and disks are CNC plasma cut, no problem to make extra holes. Holes are 7/16" so 3/8" to 1/2" would work. Plates are all 1/4". Solution is mild cyanide (1%), mostly water - but maybe a thin metal clip would work. I'd love to find a plastic stud with mushroom head that would pop into the holes, then accept the disk.
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RE: Searching for the perfect standoff or quickie fastener, or stud
At least you can look??!!
RE: Searching for the perfect standoff or quickie fastener, or stud
Only artemetrA knows the function to know if it works...
RE: Searching for the perfect standoff or quickie fastener, or stud
RE: Searching for the perfect standoff or quickie fastener, or stud
Mike McCann
MMC Engineering
RE: Searching for the perfect standoff or quickie fastener, or stud
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There are some that meet the 3/8" standoff height, for example:
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I'm not sure about the 7/16 hole, but it sounds like you have some flexibility in that regard.
The other problem is the panel thickness, since they are meant for circuit boards. You would need to counterbore, so probably not acceptable if all you're doing is cutting the plates.
Rob Campbell, PE
Imagitec: Imagination - Expertise - Execution
imagitec.net
RE: Searching for the perfect standoff or quickie fastener, or stud
Rob Campbell, PE
Imagitec: Imagination - Expertise - Execution
imagitec.net
RE: Searching for the perfect standoff or quickie fastener, or stud
For the standoffs, think something shaped sort of like the letter 'H', or better the letter 'N', i.e. with grooves extending past each other to allow the barbs to spring in.
Mike Halloran
Pembroke Pines, FL, USA
RE: Searching for the perfect standoff or quickie fastener, or stud
In all seriousness, I also like the idea of a formed standoff or a pop-in circuit board spacer. But really, welders shouldn't complain too loudly, after all, that is what they do, weld!
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Searching for the perfect standoff or quickie fastener, or stud
THANKS for the Richco links - those look like the right thing, and illustrate well what I was thinking, although all too small. All the standoffs and spacer sites I could find weren't as good. My favorite idea is the blind rivet but it's difficult to find one long enough and of correct size/material.
RE: Searching for the perfect standoff or quickie fastener, or stud
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You could instal these in holes in your base plate, and then, using spacers around the stud to get the right offset, secure the disk with some nuts.
A quick look around the Penn website didn't turn up any standoffs that would offset from the surface of the base plate in the direction you are looking for but you might be able to find something like that and avoid the spacers.
Doug
RE: Searching for the perfect standoff or quickie fastener, or stud
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