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I need a nut
- Thread starter Chawbeef
- Start date
Chawbeef
Active Member
Some pics.
Attachments
Chawbeef
Active Member
7/16 should be either 14 tpi or 20 for NF I believe..................Chawbeef
Chawbeef
Active Member
According to my Starrett thread guage it is 16 tpi..........................Chawbeef
Read the article I linked to. The original nut was 7/16-16. https://www.wisconsinpartsdatabase....haper-tool-holder-parts-armstrong-ace-2060.pl
Here is a 7/16-16 tap and die set. Make your own nut.
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Chawbeef
Active Member
I've never seen a 7/16 X 16tpi before. I also see the nut has an integral washer. Cool....................Daniel
, nice find Craig!
One thing you will learn hanging around here. Thread standards only apply when the maker follows them...... I think I am the master of getting screwed by screws. Here is what I have learned the hard way.
Step 1 - is identifying the thread pitch using a thread gauge. If one fits EXACTLY, you get to go to step 2.
Step 2 - is the diameter. But don't forget that the diameter is usually reduced for thread clearance. If you are lucky enough to find a diameter that matches the tables for that thread pitch, you get to go to the next step.
Step 3 - test fit a nut or screw. If you have been lucky, you have nailed it.
If not, throw the thread gauge back in the drawer. Time to figure out what you really have...
Your tool holder is a lantern style rocker tool holder. They often predate thread standards. Which means they might match a standard or might not. Praying does not help. Ask me how I know.....
That is clearly a specialized screw. I would not mess with it unless you have the skills and equipment to duplicate it. That means you must find or make a nut to fit it.
Don't get hung up on what the standards are today. Just go by what your measurements tell you. You can often buy specialized taps that don't meet modern standards.
Martin to the rescue!
@Chawbeef - I'm not sure where you are located. I'll certainly help you make a nut or two if Chatham Ontario is closer.
Chawbeef
Active Member
Thankyou Martin, that is a nice offer. I am in no hurry as I am really not sure how this tool is used.... Also......can I afford your services??...................LOL Daniel
Chawbeef
Active Member
Thanks, Martin is quite near to Niagara..........................Daniel
I suspected that when he didn't even ask where you are. I gather you know each other.....
Martin w
Ultra Member
Daniel, the only charge I have for services is you having to listen to me talk about machining while you are here. I just made some similar nuts and the machine is still set up.
Cheers
Martin
I made this red adapter for my router. I was positive the finger bolts for the rails were 1/4-20. I measured it with the calliper and the thread gauge. The bolts would not go in past a bit of a turn what the heck? I printed it again and same issue. So I recheck the bolts carefully and a M6x1.25 is a thread pitch of 20.32”. The thread gauge is a little bit tighter on the threads with the metric gauge but still pretty good with the imperial. Subtle…change model to M6, reprint, and the bolts go right in without even retapping.
