Author Topic: What drill do i have to use?  (Read 451 times)

Offline Tjark

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  • Woldendorp, Netherlands
What drill do i have to use?
« on: February 08, 2019, 12:59:32 PM »
I have bought a ľ x 32 spark plug and tap for the treading.
Now I wonder witch drill I have to use for the tread hole.
I have surged on the net but I canít find this information.

    Tjark.

Offline Jasonb

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Re: What drill do i have to use?
« Reply #1 on: February 08, 2019, 01:04:27 PM »

Offline Tjark

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Re: What drill do i have to use?
« Reply #2 on: February 08, 2019, 01:51:29 PM »
Jason, thanks for the information.
Also thanks for the list, I never heard of UNEF tread.

    Tjark.

Offline Lew Hartswick

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Re: What drill do i have to use?
« Reply #3 on: February 08, 2019, 06:59:19 PM »
A 1/4 - 32 thread is usually (for a 70% thread)  1/4" - 1/32" or  7/32"   :-)   Just like all the "Metricanized" folks do. :-)
   ...lew...

Offline steamer

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Re: What drill do i have to use?
« Reply #4 on: February 08, 2019, 09:47:21 PM »
Jason, thanks for the information.
Also thanks for the list, I never heard of UNEF tread.

    Tjark.

Get ye a machinery handbook.    8)

https://www.amazon.com/s?k=Machinery+Handbook&ref=nb_sb_noss_2

Otherwise known as the "Good book"  If you're going to do this stuff, it's really a need to have, as it's got so much information in it.

Unified National Extra Fine.   by the way

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!