For what its worth, a bottom tap is also called a plug tap. The easy way to
shorten a tap is to grind it.
"Bob".
> From: Roland Dudley <cobra@scs.agilent.com>
> Reply-To: Roland Dudley <cobra@scs.agilent.com>
> Date: Tue, 7 Nov 2000 16:06:32 -0800 (PST)
> To: Eganb@aol.com
> Cc: Triumphs@autox.team.net, british-cars@autox.team.net,
> tr8@mercury.lcs.mit.edu
> Subject: Re: TR7 BFH#24-d
>
> There are two types of taps (at least). What you probably want is what
> is referred to as a bottom tap. This type of tap only has a slight
> taper at the very bottom. They are a bit harder to start in a hole,
> but then you've already taken care of that part.
>
> You might be able to cut off your tap if that is your preferred
> approach. I've cut some pretty hard small metal pieces with cut-off
> disks in my Dremel tool. But look for a bottom tap first. You may need
> the tapered tap again sometime and probably a bottom tap as well.
>
> Roland
>
>>
>> Now, an interesting problem has come up. The blind bottom holes are very
>> shallow, and the tap doesn't go far enough in to cut enough threads to make
>> me feel comfortable. As you know, the tap is the largest about in the
>> middle, so you really need to have the middle part go all the way to the
>> "bottom" of where you want threads.
>>
>> Possible solution -- buy a second tap, and cut it off a third of the way up.
>> Use the first tap to get started, and the second to finish the job? Is that
>> possible? and can you even cut through these taps? Or is there another
>> obvious solution?
>>
>> Bruce
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