[Public-List] Edson Tiller head

[Kris Coward via Public-List]

In addition to having a machinist match the diameter of the new hole to
the outside diameter of the tube being installed as a sort of bushing of
sleeve to prevent wear, I'd recommend that in preparing to install the
tube, it be packed in dry ice. Alternately, take a torch to the tabs to
enlarge the holes a little (though if the tiller's already in there,
It'd probably need some protection from the fire). Ideally, do both,
and the tube should just glide right in as though the interference fit
were a sliding fit :)

There's a table of nominal/actual diameters and tolerances for that sort
of thing at http://www.engineersedge.com/class_v.htm

-K

On Fri, Mar 03, 2017 at 05:32:59AM -0500, Jonathan Bresler via Public-List wrote:
> Crazy idea: once the bolt that passes through the tabs at the end of the
> tiller head wears against the bolt holes in those aft end tabs, enlarging
> the holes.  Would it be possible/useful to overdrill the bolt holes in a
> single pass from the outside of one tab all the way to the outside of the
> other tab, perhaps by a 1/16", and insert a tube of metal that the same
> length as the distance from the outside of one tab all the way to the
> outside of the other tab, or perhaps a smidge shorter.  The bolt would pass
> through the tube, the bolt would wear on the tube, the tube would bear on
> the newly drilled holes.  Perhaps a real tight fit of tube to bolt hole
> would protect the tabs from wear due to the tube or the bolt.  Have
> machinist do the work so that the tube to overdrilled bolt hole fit is very
> very tight.
> 
> Jonathan
> 
> On Thu, Mar 2, 2017 at 10:01 PM, Don Campbell via Public-List <
> public-list at lists.alberg30.org> wrote:
> 
> > Much of the problems of the tiller head wear arise because skippers hold
> > the tiller too high. If the arms of the H bracket on the tiller are held
> > above the tiller head, then all the torque is on the tabs and bolt holes at
> > the aft of the tiller head and this torque is too much for the bronze. Two
> > things happen, first the tabs bend and second the bolt hole gets bigger and
> > therefore play develops.  Once there is play in the bronze holes,  things
> > go from bad to worse.  Thus, hanging on to a tiller while standing is not a
> > good idea. Try to keep the tiller low in the cockpit. This can be helped
> > with a tiller extension that allows for control at a much higher level
> > while keeping the H bracket on the tiller head. At least that way, the key
> > in the shaft takes most of the torque.
> > Don
> >
> > -----Original Message----- From: Stephen Gwyn via Public-List
> > Sent: Thursday, March 02, 2017 6:13 PM
> > To: public-list at lists.alberg30.org
> > Subject: [Public-List] Edson Tiller head
> >
> >
> > Hi,
> >
> > No I haven't contacted Edson yet. I haven't decided if I want to fight for
> > a refund or an exchange. The fundamental design is flawed however.
> > All the pressure is on the bolt and the holes it goes through. In the old
> > one,
> > the pressure is on the inside of the arms of the tiller part pushing on the
> > sides of the part attached to the rudder stock. I'm going to take it to
> > a machinist who has looked at in the past. He suggest welding on material
> > and the machining it back to fit, but suggested that since it would cost
> > almost as much as a new part, I might as well buy a new part.
> >
> > SG
> >
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> 
> 
> 
> -- 
> Jonathan M Bresler
> S/V Constance Alberg 30 #262
> Annapolis/Eastport MD
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-- 
Kris Coward					http://unripe.melon.org/
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