Interchange Airtonics/JR servo arms

[Bob Kane]

Dubro is now making their high strength arms
spefically for Airtronics. As I recall they are grey
in color instead of tan. I bought a batch for use on
the upcoming Temptation and they fit snugly on the
Airtronics output shaft. The older "JR/Airtronics"
horns would slip slightly, I use a piece of a plastic
bag in between the horn and shaft to tighten them up. 

--- "Atwood, Mark" <atwoodm at paragon-inc.com> wrote:

> I've found the Nylon arms to be pretty
> interchangeable between JR and
> Atx...  But with the aluminum arms Bob is
> correct...the "fit" is
> slightly off and there is some slop.  Unfortunately,
> most of the
> aluminum 3rd party arms are made for JR and then
> marketed as JR/Atx
> compatible...which they're not really.
> 
>  
> 
> -M
> 
>  
> 
> ________________________________
> 
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]
> On Behalf Of ronlock at comcast.net
> Sent: Tuesday, July 12, 2005 8:35 AM
> To: discussion at nsrca.org; discussion at nsrca.org
> Cc: Bob Pastorello
> Subject: Re: Interchange Airtonics/JR servo arms
> 
>  
> 
> Ive found it is a mixed bag.  Almost all will bolt
> on, and some 
> 
> Airtronics/JR servo and arm combinations fit
> properly.  Depending on 
> 
> particular model of servo and brand of arm, you may
> find a very slight 
> 
> bit of slop. It may show up as a slight trim change
> that that won't go
> away.
> 
>  
> 
> Later, Ron Lockhart
> 
> 	-------------- Original message -------------- 
> 	
> 	> Thanks, Ed. Didn't know it was one of those
> "close, but no
> cigar" 
> 	> things.... I had been forced to use an Airtronics
> arm in the
> distant past 
> 	> once on my JR servo.... glad to have better info!
> 
> 	> 
> 	> Bob Pastorello 
> 	> www.rcaerobats.net 
> 	> rcaerobob at cox.net 
> 	> ----- Original Message ----- 
> 	> From: "Ed Alt" 
> 	> To: 
> 	> Sent: Monday, July 11, 2005 8:31 PM 
> 	> Subject: [SPAM] Re: [SPAM] Re: servo horns 
> 	> 
> 	> 
> 	> > Bob: 
> 	> > The number of teeth are the same, however you
> will get a
> sloppy fit when 
> 	> > you interchange them. Try a machined, snug
> fitting aluminum
> arm meant for 
> 	> > a JR servo on an Airtronics and you will see
> what I mean.
> You can make it 
> 	> > work, but the tolerances are not the same. 
> 	> > 
> 	> > Ed 
> 	> > ----- Original Message ----- 
> 	> > From: "Bob Pastorello" 
> 	> > To: 
> 	> > Sent: Monday, July 11, 2005 9:22 PM 
> 	> > Subject: Re: [SPAM] Re: servo horns 
> 	> > 
> 	> > 
> 	> >> JR fits Airtronics/vice versa. 
> 	> >> 
> 	> >> Bob Pastorello 
> 	> >> www.rcaerobats.net 
> 	> >> rcaerobob at cox.net 
> 	> >> ----- Original Message ----- 
> 	> >> From: "Ed Alt" 
> 	> >> To: 
> 	> >> Sent: Monday, July 11, 2005 8:15 PM 
> 	> >> Subject: [SPAM] Re: servo horns 
> 	> >> 
> 	> >> 
> 	> >>> Bill: 
> 	> >>> No, JR is different from Futaba. As far as I
> know, every
> single major 
> 	> >>> servo manufacturer has their own unique
> spline design. 
> 	> >>> Ed 
> 	> >>> 
> 	> >>> ----- Original Message ----- 
> 	> >>> From: "Bill Pritchett" 
> 	> >>> To: 
> 	> >>> Sent: Monday, July 11, 2005 8:56 PM 
> 	> >>> Subject: servo horns 
> 	> >>> 
> 	> >>> 
> 	> >>>> All: 
> 	> >>>> Will Futaba horns fit ok on JR servos? 
> 	> >>>> Thanks 
> 	> >>>> Bill 
> 	> >>>> 
> 	> >>>> 
> 	> >>>> Bill Pritchett 
> 	> >>>> 765-744-9322 
> 	> >>>> 
> 	> >>>>
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=== message truncated ===


Bob Kane
getterflash at yahoo.com

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