MadModder

The Breakroom => Resources => Topic started by: Bogstandard on May 01, 2011, 02:20:03 AM

Title: Tapping chart
Post by: Bogstandard on May 01, 2011, 02:20:03 AM

Here are a set of tapping charts, that if used correctly can help to prevent you breaking those small, and even larger taps.

If you are using a range of materials, it gives you 'safe' ranges for drilling the tapping holes, so say in stainless, you could use one of the slightly looser fits and if into say brass, a tighter one, but still have a useable threaded coupling.

It covers a range of the most popular threads you will encounter during everyday modding.


Bogs

Title: Re: Tapping chart
Post by: AdeV on May 01, 2011, 04:11:14 AM

Nice one, thanks John, I think that covers every size I'll ever use except some of the larger Whitworth, and I'm sure I can find those if I have to

 :thumbup:

Title: Re: Tapping chart
Post by: John Swift on May 01, 2011, 05:40:54 AM

Hi John ,

I think its the best version of the tapping drill chart I've seen

should make it easier to chose the correct drill

its there  a version for formed threads ?

 it would be handy for the thread forming machine screws you find used on cars

( tri lobed thread forming screws are good in thin metal, the deformed metal give you  more thread )

    John

Title: Re: Tapping chart
Post by: Bogstandard on May 01, 2011, 06:45:22 AM

John,

Sorry, I work totally blind when using such things, maybe wrongly, but it seems to work.

I have a load of the tri sided self cutting screws, especially used, like you said, in thinnish materials, and I use a standard tapping hole for the size and that seems to work well for me.

I occasionally use thread forming taps, and I use the same standard sizes for those as well, but only use them in soft materials, never having had the b***s to try them in stainless, but supposedly they work well in that also.


John

Title: Re: Tapping chart
Post by: John Swift on May 01, 2011, 07:09:41 AM

Hi John ,

up till now I've used the nearest drill I have to the thread size less half the thread depth   (ie 5.5mm for a 6mm 1mm pitch screw)

but since my previous  reply I've found this link :--

http://www.taptite.net/pdfs/documents/TAPTITEII-CONTI-reminc.pdf

    John

Title: Re: Tapping chart
Post by: kellswaterri on May 01, 2011, 10:30:12 AM

Thanks John, the resident ''BLACK hOLE'' in my shed seems to have swallowed the others.... :thumbup:...John.

Title: Re: Tapping chart
Post by: DaveH on May 01, 2011, 12:02:16 PM

That's sure is a comprehensive chart. :thumbup:

Ta John

DaveH

Title: Re: Tapping chart
Post by: Blade on May 02, 2011, 10:17:53 PM

Looks like a great chart, thanks for sharing!