Rear Bearing w/Nylon Retainers

[Rick Wallace]

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
> > =====================================
> > # To be removed from this list, send a message to
> > # discussion-request at nsrca.org
> > # and put leave discussion on the first line of the body.
> > #
> >
> >
>
>=====================================
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