Drag link on servos

[David Lockhart]

The output shaft screw for the metal gear JR servos is a 3 mm machine screw.
The JR servo output shaft supporter weighs 6 grams and does not require any
additional structure or mounting points.  Tapping a nylon output shaft for
the 3mm screw is a pain, but I've done it.

Regards,

Dave Lockhart
DaveL322 at comcast.net


----- Original Message -----
From: "Bob Miller" <bd4 at inter-linc.net>
To: <discussion at nsrca.org>
Sent: Monday, February 09, 2004 3:43 PM
Subject: Re: Drag link on servos


> I belive most if not all of the metal gear servos use a 2.5 x 8 mm machine
> screw.
>
> Bob Miller
> ----- Original Message -----
> From: "Dean Pappas" <d.pappas at kodeos.com>
> To: <discussion at nsrca.org>
> Sent: Monday, February 09, 2004 1:53 PM
> Subject: RE: Drag link on servos
>
>
> > Hello Xavier,
> > To begin with, the special JR item that provides the hard-point is not
> really heavy. Using an existing hard-point in the airframe, is always
going
> to be lighter, though.
> >
> > If the servo uses a machine screw, then the appropriately longer screw
can
> almost always be found in the RC car section of the hobby shop. The Futaba
> servos use a 2-mm screw. I'd be surprised if JR use a different size. If
the
> output arm is plastic then it probably uses what looks (to me) to be a
> blunt-ended sheet-metal screw. You will have to hunt for the right sized
> screw ... I have no special source. A coarse-thread machine screw of the
> right diameter could work nicely, in the plastic.
> >
> > The ball and the conical standoff, that help the linkage to clear the
> servo wheel, were part of the hardware package that came with the
ball-link.
> I used a large Rocket City brand ball-link, because the 2-mm screw passes
> through the hole in it. If you use another brand, then fabricate a tiny
> hollow standoff, or use a stack of tiny washers.
> > Let me know if I didn't fully answer your question
> > Regards,
> > Dean
> >
> >
> > -----Original Message-----
> > From: Xavier Mouraux [mailto:xavier.mouraux at sympatico.ca]
> > Sent: Saturday, February 07, 2004 8:49 PM
> > To: discussion at nsrca.org
> > Subject: Drag link on servos
> >
> >
> > Hello all, and Dean Pappas in particular,
> >
> > In the February issue of Flying Models, you show some drag links on
> servos.
> > I was planning on installing links like this on my planes latelly and
the
> > article gave me some new ideas. However I am still stuck with the servo
> arm
> > screw/ball head problem.
> > What could I use to replace the screw on JR servos (digital and not) to
> > attach the ball link ? I have seen the special JR set-up before but it
> seems
> > heavy. Your suggestion looks better for my applications.
> >
> > Anybody else with ideas for that ?
> >
> > Thanks
> >
> > Xavier
> >
> > =====================================
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> > #
> >
> >
>
>
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