[Amps] Jennings UCS puller interchangeability ?

[N7KA at comcast.net]

You may have "bellows Couplings".  Look through a McMasterCarr catalog, all kinds of adapters and couplings available.  

Arne N7KA 

----- "Jim Thomson" <jim.thom at telus.net> wrote: 


Date: Mon, 2 May 2011 17:36:58 -0700 
From: "Jim W7RY" <w7ry at inbox.com> 
Subject: Re: [Amps] Jennings UCS puller interchangeability ? 
The end of the shaft sizes are 1/4" and 3/8" .  The cap itself has 1/4-28 
threads (1/4" 28 threads per inch).  Most of the "nose cones" are the same 
size. 
Sometimes the 3/8" shaft end is just an adapter installed onto/over the top 
the 1/4" end shaft. 
####  I have several of the jenning's vac caps... and some are 1/4"- 3/8"- and also 1/2" shafts. 
 [ this is the end portion that have to mate to].  Since my shafts through the front panel turns counter's 
are all 1/4" SS.... and adaptor has to be used.... like 1/4- 1/4    or  3/8- 1/4    or  1/2- 1/4. 
I was given a few really nice adaptors... and have never seen em since.   These were like a small bellows  affair 
in the middle of the adaptor..... sorta accordian type....and were cylindrical in shape.  The ones given to me took 
a 1/2"  shaft [with set screws] on one end... and took a 1/4' shaft  [ with set screws]  on the other end.  These 
adaptor's  were the best yet..since they would easily allow  for a small amount of shaft misalignment.  If anybody 
knows a source  for these bellows types, let me know, as I could use at least 2 more of them. 
##  I also have a few of the solid brass adaptors, in  3/8-1/4  variety..and also 1/2- 1/4.   Those will work as well.. 
BUT, will not tolerate any shaft misalignment at all.   Some of the 5-20 kv shaft isolators  [ 3/8-1/4  and  1/4-1/4] 
will allow for a tiny bit of shaft misalignment..and also electrically isolate the 2 x shafts. 
## In the odd place where an electrical shaft isolator is required, but the standard shaft isolator won't fit,due to space 
constraints, then  a solid  1/4"  diam  fiberglass  rod can be used instead. 
Later... Jim   VE7RF         
Hope this helps. 
73 
Jim W7RY 
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