[ARC5] Command Set Shaft Collar Nut

Wed Apr 12 17:20:24 EDT 2017

After taking some careful measurements, I have purchased the 1/2-27 tap & die set from China via eBay. I also have discovered that a brass 5/16" compression cap will fit almost perfectly over the shaft collar, except for the threads.

I do intend to rethread the compression cap and try it. I'll let everyone here know whether it works OK or not. Should be in a couple of weeks (due to the time it takes to receive the tap & die from Hong Kong via ePacket).

Thanks for all the interesting replies!

Respectfully,

Phillip W4RTX 

Sent from my iPhone

> On Apr 12, 2017, at 1:48 PM, Bruce Long via ARC5 <arc5 at mailman.qth.net> wrote:
> 
> There are a number of 1/2-27 taps currently on USA Ebay including
> Taps from China for $15.00 shipping included
> 
> http://www.ebay.com/itm/Tap-1-2-27-HSS-Right-hand-Tap-1-2-27-TPI-/302050492349?hash=item46539cbfbd:g:u-4AAOSwHoFXt~tp
> 
> 
> 
> From: Michael Hanz <aaf-radio-1 at aafradio.org>
> To: Leslie Smith <vk2bcu at operamail.com>; arc5 at mailman.qth.net 
> Sent: Wednesday, April 12, 2017 1:06 PM
> Subject: Re: [ARC5] Command Set Shaft Collar Nut
> 
> What about 
> http://www.ebay.com.au/itm/1-2-x-27-uns-hss-plug-new-tap-/172586672791
> 
> It ships from Devon, but it appears to be free shipping to Australia.
> 
> On 4/12/2017 11:59 AM, Leslie Smith wrote:
> >    Hello Bill,
> >
> >    I tried to buy a tapping tool for 1/2 inch 27 threads per inch from my
> >    local bicycle shop, and also at the largest tool supplier
> >    (Blackwoods).  Nothing.
> >
> >    73 de Les Smith
> >    vk2bcu at operamail.com
> >
> > On Wed, Apr 12, 2017, at 22:40, Bill Cromwell wrote:
> >> Hi Les,
> >>
> >> On this continent (and probably all continents) the generation that
> >> designed those radios were much more familiar with bicycles than the
> >> present generation(s). And in the days when those designers were growing
> >> up and into their adult lives had a lot more hands-on experience with
> >> everything in their lives. Most of the people using bicycles today pay
> >> far too much for them and then can barely manage the simplest of
> >> 'maintenance' - maybe washing and waxing and a drop of oil here and
> >> there. Bicycle shops that I know about are always busy keeping this
> >> generation's bicycle status symbols working. I'll stop in there and ask
> >> about 1/2-27 parts.
> >>
> >> 73,
> >>
> >> Bill  KU8H
> >>
> >> On 04/11/2017 07:46 PM, Leslie Smith wrote:
> >>>    Threads on "command" radio receivers.
> >>>    I refer to the thread used between the tuning system and the receiver.
> >>>    I measured the thread using a thread gauge.
> >>>    I found the thread was 27 turns to the inch (and NOT 28 tpi)
> >>>    Using Newnes Workshop Handbook I read that (1) the thread was 1/2
> >>> inch cycle thread
> >>>    (2) this thread was considered to resist "unwinding" due to vibration.
> >>>
> >>>    That's all I know.
> >>>    Except I thought it was very clever to use a thread that resisted
> >>> working free in equipment subject to vibration.
> >>>    How did those radio guys know about bicycle threads?  Hmmm?
> >>>
> >>>    73 de Les Smith
> >>>    vk2bcu at operamail.com
> >>>
> >>>
> >>>
> >>> On Wed, Apr 12, 2017, at 08:17, Phillip Carpenter wrote:
> >>>> Mike,
> >>>>
> >>>> I was reading that website posting but it was unclear if the ARC-5
> >>>> receivers had the same thread. It looked like he was talking about
> >>>> ARB receivers.
> >>>>
> >>>> Phillip W4RTX
> >>>>
> >>>> Sent from my iPhone
> >>>>
> >>>> On Apr 11, 2017, at 5:39 PM, Michael Hanz <aaf-radio-1 at aafradio.org
> >>>> <mailto:aaf-radio-1 at aafradio.org>> wrote:
> >>>>> See http://aafradio.org/garajmahal/flex_drive_cables.html for all
> >>>>> that stuff.  The tuning shaft collar is a straight 1/2"-27TPI thread
> >>>>> (_not_ a tapered pipe thread).
> >>>>>
> >>>>> 73,
> >>>>> Mike
> >>>>>
> >>>>>
> >>>>> On 4/11/2017 5:26 PM, Phillip Carpenter wrote:
> >>>>>> Does anyone know what thread size and type of through-hole nut fits the shaft collar on the Command Set receivers?
> >>>>>>
> >>>>>> I know it's smaller than a 3/8" NPT compression nut.
> >>>>>>
> >>>>>> Thank you in advance to all who reply!
> >>>>>>
> >>>>>> Respectfully,
> >>>>>>
> >>>>>> Phillip W4RTX
> >>>>>>
> >>>>>> Sent from my iPhone
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> >> bark less - wag more
> 
> >>
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