If the pipe is 1/2" outside diameter, then a 1/2"-13 UNC or 20 UNF die
would be used. Pipe is usually given by the inside diameter and
normally has tapered threads (NPT), in the US. A 1/2" pipe would use a
1/2" NPT die which is much larger than the 1/2"-13 or 20 dies.
Austin Healey 3000 BN7/BT7 registrar
On 5/13/20 7:12 AM, Tom Felts wrote:
> Totally off Healey content, but here is a stupid question Re. dies.Â I
> have a piece of 1/2" OD steel pipe I want to thread (the outside).Â I
> don't know the die size to use.Â A 1/2" die seems way too small.Â Anyone
> know what size die to use?Â the number of threads doesn't matter---just
> the size of the die.
> ----- Original Message -----
> From: Michael MacLean <firstname.lastname@example.org>
> To: 'Healeys' <email@example.com>, simon lachlan
> Sent: Wed, 13 May 2020 02:51:28 -0400 (EDT)
> Subject: Re: [Healeys] BSF Taps and Dies
> I just want them to clean up threads.Â Should be adequate for that..
> Mike M
> On Tuesday, May 12, 2020, 11:33:41 PM PDT,
> <firstname.lastname@example.org> wrote:
> Iâ??ve got one of these. Iâ??d say that it was adequate for an amateur (me).
> The taps and dies are OK, but the tools are pretty marginal. Worth the
> *From:*Healeys <email@example.com> *On Behalf Of *Michael
> *Sent:* 12 May 2020 23:28
> *To:* Healeys <firstname.lastname@example.org>
> *Subject:* [Healeys] BSF Taps and Dies
> just a FYI for those of you dealing with BSF fasteners.Â Amazon sells a
> BSF tap and die set for $36.
> Mike MacLean
> Sent from AT&T Yahoo Mail on Android
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