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Thread Sizes
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Topic: Thread Sizes (Read 2858 times)
Fast_Eddie
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Posts: 909
Body by Holden. Soul by Fast Eddie.
Thread Sizes
«
on:
March 28, 2004, 11:22:57 AM »
0
Hello,
I'm about to purchase some taps and dies to clean up some bolts, etc, and retap some captive nuts in the FC.
Am I correct in assuming that the early Holdens are UNC & UNF thread?
Regards
Edward
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Effie C
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Model: other Holden
Posts: 822
Still Lost & Confused
Re: Thread Sizes
«
Reply #1 on:
March 28, 2004, 11:42:50 AM »
0
Thats correct Edward, UNC & UNF, would suggest some die nuts too if you can afford them.
John M
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LIVE LIFE ONE DAY AT A TIME,FOR TOMORROW MAY NEVER COME!
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Fast_Eddie
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Body by Holden. Soul by Fast Eddie.
Re: Thread Sizes
«
Reply #2 on:
March 30, 2004, 08:17:01 PM »
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John,
I purchased taps and dies, and cleaned up a few nuts and bolts. Now the nuts spin onto the bolts!
Simple pleasures....
Seeing it was 20 years ago that I completed year 8 metalwork, I'm a little bit rusty on some of the tecnique with tapping new holes. What's the relationship between the hole diametre, and the tap that is required to tap it.
ie, Do I bore a 5/16 hole for a 5/16 tap, or should it be a 1/4 or 9/32?
No doubt there is a published table that identifies this? Any advice would be appreciated.
Regards
Edward
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craiga
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Re: Thread Sizes
«
Reply #3 on:
March 30, 2004, 08:29:07 PM »
0
Edward,
I did a quick search and came up with a figure 55 -75% of the major diameter as depicted in the image below.
You could also have a look here
http://www.cartech.com/machining_zone/tapping.html
which has enough info to keep you amused for hours on end.
Even has formulas!!! WOOHHHOOO
Cheers,
Craig.
«
Last Edit: March 30, 2004, 08:33:15 PM by craiga
»
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Murray
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Re: Thread Sizes
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Reply #4 on:
March 31, 2004, 08:42:13 AM »
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P&N (cutting tool makers) put out a really good chart that covers a wide variety of threads but I am not too sure where you could get one. Perhaps Blackwoods or one of the other engineering supliers.
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