Math question..14?

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Bernie/MA
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Math question..14?

Post by Bernie/MA » Mon Apr 27, 2020 2:13 pm

1/2" nut sliding into 3/4" square tube, 1/8" wall. How wide is the slot for the peaks to slide in, press fit? I could send a piece to experiment times 4.

PHPaul
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Re: Math question..14?

Post by PHPaul » Mon Apr 27, 2020 2:59 pm

Let me play with that for a bit. Need the outside dimensions of the nut point to point and the inside dimensions of the square tubing.

Image

Needs to be reasonably accurate, not micrometer accurate but say within 1/32nd.

PHPaul
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Re: Math question..14?

Post by PHPaul » Mon Apr 27, 2020 3:01 pm

Let me know if the picture showed up. Something funky going on lately, can't see them on this end but they're usually there for other folks.

Bernie/MA
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Re: Math question..14?

Post by Bernie/MA » Mon Apr 27, 2020 3:18 pm

They showed up. The id of the tube is 1/2. The nut, 1/2, is for a 5/16 bolt. You must have one,lol.

Bernie/MA
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Re: Math question..14?

Post by Bernie/MA » Mon Apr 27, 2020 3:21 pm

I need to get a cutter to mill the slots.

PHPaul
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Re: Math question..14?

Post by PHPaul » Mon Apr 27, 2020 3:44 pm

Bernie/MA wrote:
Mon Apr 27, 2020 3:18 pm
They showed up. The id of the tube is 1/2. The nut, 1/2, is for a 5/16 bolt. You must have one,lol.
Well, there are a couple of different sizes but it it fits a 1/2 inch socket, I guess they're all the same within a certain tolerance.

I'll do some sketching and ciphering and get back to you.

PHPaul
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Re: Math question..14?

Post by PHPaul » Tue Apr 28, 2020 5:42 pm

Haven't forgotten about you Bernie. My CAD computer took a dump and I can't get the antique program I use to run on Win-Doze 7. Waiting on another box from Fee Bay that I can load an old operating system on and get the CAD program running again.

Then I can draw it out to scale and get some accurate dimensions.

Bernie/MA
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Re: Math question..14?

Post by Bernie/MA » Tue Apr 28, 2020 7:10 pm

A machinist friend has cutters about 1/8 thick but I'm thinking that's too wide. I don't remember much geometry.

PHPaul
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Re: Math question..14?

Post by PHPaul » Sat May 02, 2020 7:57 pm

Got all the pieces-parts to put a CAD computer together today. Should have an answer for you tomorrow.

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Re: Math question..14?

Post by PHPaul » Sun May 03, 2020 9:39 am

Image

I'm assuming you meant a nut that fits a 1/2" socket as a nut for a 1/2" bolt won't fit in 3/4 square tubing.

I drew up both just to be sure.

The drawing on the left shows the max width of the slot needed to be just under .1 inches. Actually .0987 but the drawing conversion rounded it up. Given the probable variations in actual production, I'd go with the .1 figure.

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