<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2627" name=GENERATOR></HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>By all means leave in the seals on sealed bearings.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Be careful, however, if you are using shielded
bearings. The metal type shield is not a seal. The bearings come lubricated
with grease. When it heats up this grease gets out of the shields and does
cause problems. It will make its way to your tank or carb. depending upon your
fuel tank pressurizing system. I have seen the grease come out of the carb
intake! Also it does not get replaced by oil if the shield is still
there.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have run these bearings with and without
shields. If they are stainless they do just fine with one shield removed. I
leave the cage and ball-bearings exposed to the crankcase fuel
mix.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>BTW - even sealed bearings can get too hot. I have
seen the seals swell and prevent idle due to "rubbing" against
the crankshaft counter balance.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Eric.</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=wgalligan@goodsonacura.com
href="mailto:wgalligan@goodsonacura.com">Wayne Galligan</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, May 20, 2005 2:23 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [SPAM] Re: [SPAM] Re: A
Bearing Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>I have been using the Bearings
Limited bearing from Purvis and they are steel with seals and I just
leave the seals in. So far about 300 flights my OS engine and no
signs of problems. So I think if you go with the stainless and leave the
seals in they should go far a long time like the others have stated.
</FONT><FONT face=Arial size=2>The first time I used the Bearings Limited
version I took the seal out and the bearing only lasted about 30
flights. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have to raise a point here about the issue of
taking the seal out. If you take the seal off the front part of the
bearing leaving the rear seal in it is still a sealed bearing because the
front of the bearing will be sealed by the crankcase itself. As Bob's
post states "shield" this could mean the bearing is not truly
sealed.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am willing to bet that next time I change
my sealed bearing that I could remove one of the seals and there will still be
lube in it. We use sealed bearings in many applications that
do not require any outside lubrication influence, i.e.
alternators,brushless motors(20k plus rpm),fan motors, wheel bearings.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am convinced the rust is the number one
contributor to bearing failure and load being secondary.
</FONT></DIV>
<DIV><FONT face=Arial size=2>I run two head shims so this could also be the
reason my bearings are holding up better then some.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Wayne G.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rodney19821982@yahoo.com
href="mailto:rodney19821982@yahoo.com">Rodney Tanner</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, May 20, 2005 10:33
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [SPAM] Re: [SPAM] Re: A
Bearing Tip - Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV>Thanks Verne,</DIV>
<DIV>That is what I had heard. </DIV>
<DIV> </DIV>
<DIV>Rodney Tanner.<BR><BR><B><I>Verne Koester <<A
href="mailto:verne@twmi.rr.com">verne@twmi.rr.com</A>></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<META content="MSHTML 6.00.2900.2627" name=GENERATOR>
<DIV><FONT face=Arial>Rodney, </FONT></DIV>
<DIV><FONT face=Arial>If you're putting it in an O.S. 1.4, definitely
leave the seals in. You'll get 300-500 flights with the seals in. With
them out, you'll be lucky to put 5 gallons through the engine before
they're shot!</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Verne Koester</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=rodney19821982@yahoo.com
href="mailto:rodney19821982@yahoo.com">Rodney Tanner</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, May 19, 2005 10:33
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [SPAM] Re: A Bearing Tip -
Boca Bearing Newsletter</DIV>
<DIV><BR></DIV>
<DIV>Bob, So using an OS 140 EFI bearing, is it advisable to remove the
seals?</DIV>
<DIV>Rodney<BR><BR><B><I>Bob Pastorello <<A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A>></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<META content="MSHTML 6.00.2900.2627" name=GENERATOR>
<STYLE></STYLE>
<DIV><FONT face=Arial size=2>Since I use theirs, I get this
e-newsletter. This month's tip;</FONT></DIV>
<DIV><FONT face=Arial size=2><<If your Front engine bearing has
two rubber seals you should not remove them. These bearings have their
own grease and can help stop oil leaks. If your bearing has two
shields, we recommend you remove one of them. For instructions on
removing your shields take a look at this <A class=fpbodylink
href="http://www.bocabearings.com/main1.aspx?p=help#six">Help
Section</A>.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Your Rear engine bearing should be open
on both sides to allow as much fuel as possible to pass through and
act as a lubricant. You may however want leave one shield on in the
rear which would help to protect the rest of the engine from any
foreign matter getting through. This should not be done with one seal.
If you find your engine is stingy in getting fuel to the rear, you
should definitely leave the bearing open.</DIV>
<P class=body2><SPAN class=body2>In our next issue of the Boca
Bearings Tips & Advice </SPAN>Newsletter we will show you how to
remove your bearing shields. >></P>
<P class=body2>Note - if you open your crankcase, using sealed
bearings, and the crankshaft counterweight it dry-looking, or the
lower part of the bearing isn't pooling oil, you may think about
removing the seals. I do, for this reason.</P></FONT>
<DIV><FONT face=Arial size=2><BR>Bob Pastorello<BR><A
href="http://www.rcaerobats.net/">www.rcaerobats.net</A><BR><A
href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</A></FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>