Rear Bearing w/Nylon Retainers

[ronlock]

Ive had poor longevity with Boca Ceramics in an
OS 140.

Per the post from Bob, maybe stainless is the way to
go.   I wore out a piston/sleeve in an Hanno .61, but
the stainless bearing in it remains fine
Ron Lockhart
----- Original Message -----
From: "Rick Wallace" <rickwallace45 at hotmail.com>
To: <discussion at nsrca.org>
Sent: Sunday, January 05, 2003 6:26 PM
Subject: Re: Rear Bearing w/Nylon Retainers


>
>
> Hmmmm... been using the Boca Econo Power bearings in my 140RX all year -
> 250+ flights w/ no problems ...
>
> I've heard that all the Boca's except the Econo-Power bearings(including
the
> High Speed and the Ceramic) use a retainer (phenolic?) that will degrade
in
> the presence on nitromethane and eventually fails.
>
> Also that the hi-speed bearings have no advantage over the Econo Power
ones
> when RPM is less than 25000...
>
> Sure wish they made ceramic bearings with standard (non-nitro-sensitive)
> retainers....
>
> Comments/ other experience?
>
> Rick
>
>
> >
> >Boca sells several grades.  Ask for the high quality units.
> >
> >Rick
> >Pittsfield ME
> >----- Original Message -----
> >From: "Jerry Budd" <jbudd at QNET.COM>
> >To: <discussion at nsrca.org>; <pattern at rcmailinglists.com>
> >Sent: Sunday, January 05, 2003 1:09 PM
> >Subject: Rear Bearing w/Nylon Retainers
> >
> >
> > > Hi all,
> > >
> > > Does anyone know of a source of bearings with nylon retainers?  I
> > > need to replace the rear bearing in my OS-140RX and it was suggested
> > > to me by a leading engine authority that a bearing with nylon
> > > retainers (not phenolic) might help.  To date I've been using the
> > > inexpensive Boca Bearings with mixed results; the last bearing
> > > failure took out the piston/sleeve.  I have not used any other
> > > bearings but I am open to suggestions!
> > >
> > > TIA, Jerry
> > > --
> > > ___________
> > > Jerry Budd
> > > mailto:jbudd at qnet.com
> > > =====================================
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> > >
> > >
> >
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