[NSRCA-discussion] YS help

[John Ferrell]

Another opinion:
I won't argue with success but before I would resort to emery cloth I would 
try real hard to clean up the shaft with Scotch Brite. Emory cloth can and 
will remove metal. The you have an under sized shaft which can permit the 
bearing to spin on the shaft. Although this can be effectively resolved with 
loctite it is better to not get the problem. Also, anytime you use emory 
cloth it is good to get fanatical about cleaning up any residual grit!

John Ferrell    W8CCW

"All that is necessary for the triumph of evil is for good men to do 
nothing." -- Edmund Burke
http://DixieNC.US

----- Original Message ----- 
From: "Ron Van Putte" <vanputte at cox.net>
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Friday, July 04, 2008 6:30 PM
Subject: Re: [NSRCA-discussion] YS help


>I had this happen on an OS 1.40RX.  To say that it was difficult to  remove 
>the bearing from the crankshaft is understating the problems I  had.  I 
>ended up using wood chisels and flat blade screw drivers.  I  inserted a 
>wood chisel behind the bearing, with the flat part of the  chisel facing 
>back. I supported the opposite side of the crankshaft  and lightly tapped 
>the chisel.  Then I moved to the opposite side and  did the same thing. 
>Eventually the bearing started to slide on the  crankshaft.  In my case, it 
>turned out that the crankshaft was  oversize and the bearing was seized on 
>the shaft, so it didn't just  slide off.  When there was enough of a gap, I 
>turned the chisels  around and used them as levers.  I progressively 
>"walked" the bearing  off by putting flat screwdrivers between the chisels 
>and the  crankshaft using the chisels as levers.  It took me at least half 
>an  hour of careful work to get the bearing off.  I chucked the  crankshaft 
>in my drill press and honed it to the right size using  emory cloth.  I'm 
>still using that motor.
>
> Ron VP