Tom,
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.
Cheers,
Bob Haskell
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. I
> have a piece of 1/2" OD steel pipe I want to thread (the outside). I
> don't know the die size to use. A 1/2" die seems way too small. Anyone
> know what size die to use? the number of threads doesn't matter---just
> the size of the die.
> Thanks
> Tom
>
> ----- Original Message -----
> From: Michael MacLean <rrengineer.mike@att.net>
> To: 'Healeys' <healeys@autox.team.net>, simon lachlan
> <simon.lachlan@alexarevel.plus.com>
> 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. Should be adequate for that..
> Mike M
>
>
> On Tuesday, May 12, 2020, 11:33:41 PM PDT,
> <simon.lachlan@alexarevel.plus.com> 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
> money.
>
> Simon
>
> *From:*Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Michael
> MacLean
> *Sent:* 12 May 2020 23:28
> *To:* Healeys <healeys@autox.team.net>
> *Subject:* [Healeys] BSF Taps and Dies
>
> just a FYI for those of you dealing with BSF fasteners. Amazon sells a
> BSF tap and die set for $36.
>
> https://smile.amazon.com/BSF-20pc-British-Standard-Fine/dp/B01MCZHN40/ref=mp_s_a_1_5?dchild=1&keywords=AB+Tools-Toolzone&qid=1589322431&sr=8-5
>
> Mike MacLean
>
> Sent from AT&T Yahoo Mail on Android
> <https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature>
>
>
>
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