Tapping size

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Date

01-27-2008

Posted by campingstoveman on January 27, 2008, 4:29 am

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Gentlemen,

Can anyone tell me the tapping size of a 11/16ths UNF tap, I know its a
bastard size, I have bought a tap but none of my books give a drill size for
it.
Its for Landrover track rod ends.

Martin P

--
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Semper in Excrementem Altitudo Solus Varius

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Posted by Peter Neill on January 27, 2008, 4:46 am

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On Sun, 27 Jan 2008 09:29:45 -0000, "campingstoveman"

>Gentlemen,
>
>Can anyone tell me the tapping size of a 11/16ths UNF tap, I know its a
>bastard size, I have bought a tap but none of my books give a drill size for
>it.
>Its for Landrover track rod ends.
>
>Martin P

Can't precisely help you Martin, but thereis a calculator you can use
here:
http://www.natool.com/engdata/data13.php

Peter

Posted by Tom on January 27, 2008, 4:53 am

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campingstoveman wrote:

> Gentlemen,
>
> Can anyone tell me the tapping size of a 11/16ths UNF tap, I know its a
> bastard size, I have bought a tap but none of my books give a drill size for
> it.
> Its for Landrover track rod ends.
>
> Martin P
>

MH gives, for 1-1/2D to 3D depth of engagement as between 0.651-0.655"
so 21/32" drill is pretty close @ 0.65625"

Tom

Posted by Tim Leech on January 27, 2008, 5:34 am

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wrote:

>campingstoveman wrote:
>

>> Gentlemen,
>>
>> Can anyone tell me the tapping size of a 11/16ths UNF tap, I know its a
>> bastard size, I have bought a tap but none of my books give a drill size for
>> it.
>> Its for Landrover track rod ends.
>>
>> Martin P
>>

>MH gives, for 1-1/2D to 3D depth of engagement as between 0.651-0.655"
>so 21/32" drill is pretty close @ 0.65625"
>
>Tom

What is the pitch? 5/8" is 18 tpi, 3/4 is 16.

I've got an 11/16" UNS tap, 16 tpi, in my hand which is marked 'use
5/8" drill'.

Tip

Posted by Tom on January 27, 2008, 1:46 pm

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Tim Leech wrote:

> wrote:
>
>

>>campingstoveman wrote:
>>
>>

>>>Gentlemen,
>>>
>>>Can anyone tell me the tapping size of a 11/16ths UNF tap, I know its a
>>>bastard size, I have bought a tap but none of my books give a drill size for
>>>it.
>>>Its for Landrover track rod ends.
>>>
>>>Martin P
>>>

>>
>>MH gives, for 1-1/2D to 3D depth of engagement as between 0.651-0.655"
>>so 21/32" drill is pretty close @ 0.65625"
>>
>>Tom

>
>
>
> What is the pitch? 5/8" is 18 tpi, 3/4 is 16.
>
> I've got an 11/16" UNS tap, 16 tpi, in my hand which is marked 'use
> 5/8" drill'.
>
> Tip
>

My MH gives 11/16" UNF as 24 tpi. As the pitch wasn't quoted...

Tom

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