Gunsmithing Anyone have a chart for threading and tapping

[tjonh2001]

i am wondering if anyone has a chart that shows the min and max sizes for threading and also for using taps. ive heard the machinist handbook but i dont think i need an entire book for this chart. if im wrong let me know which addition of the book i need.

 

[Hink]

Re: Anyone have a chart for threading and tapping

Drill and Tap Chart


Let me know if this is any help.

 

[tjonh2001]

Re: Anyone have a chart for threading and tapping

thats a great chart.

now if i can get a chart that shows what i need to turn the inside diamiter so i can thread it. like what i need to bore the inside to before i start threading for 5/8x24 and other pitches.

 

[Tac284]

Re: Anyone have a chart for threading and tapping

Tap drill size = MD - 1/N

MD is Major diameter, which in you case is (.625)

1/N is 1 divided by the number of threads per inch, which in your case is (24)

so .625 - 1/24 = .5833 this number gives you 75% thread

Hope this helps

 

[Swampkat]

Re: Anyone have a chart for threading and tapping

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tjonh2001</div><div class="ubbcode-body">thats a great chart.

now if i can get a chart that shows what i need to turn the inside diamiter so i can thread it. like what i need to bore the inside to before i start threading for 5/8x24 and other pitches. </div></div>

Here you go:

http://www.efunda.com/designstandards/screws/unified.cfm

click NEXT at the bottom to get to class 2 and class 3 5/8x24.

 

[tjonh2001]

Re: Anyone have a chart for threading and tapping

perfect