Rear Bearing w/Nylon Retainers

[Del Rykert]

My biggest problem with the Stainless bearings was the retainers would go long before the balls got bad.
 
             Del K. Rykert
     AMA - 8928 
     NSRCA - 473
     Kb2joi - General 


  ----- Original Message ----- 
  From: ronlock 
  To: discussion at nsrca.org 
  Sent: Sunday, January 05, 2003 6:09 PM
  Subject: Re: Rear Bearing w/Nylon Retainers


  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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