rudder head flange movement... again! - SailNet Community

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Old 04-20-2012
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rudder head flange movement... again!

About 3 years back, I noticed relative movement between the rudderr post and the rudder post flange.
I took it off, and re-cut a new keyway in the flange and used a new key.
There was no discernable movement then.
Today, it's appearing again, very slight, but definitely there. It must be between the key and the rudder post methinks. I had to hammer the key in last time so I don't know where it's coming from.
Why the hell do these manufacturers not put the rudder post flange on a taper????
In order to do that, I have to lift the boat, drop the rudder, taper the rudder shaft and manufacture another rudder head flange and keyway to fit, then put it all together again.
And for what?, an extra $20 of machining back in 1977.

Last edited by Rockter; 04-20-2012 at 05:49 AM.
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Old 04-20-2012
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Re: rudder head flange movement... again!

Are you talking about the quadrant? Or do you have a flange bearing at the top of your rudder shaft? The quadrant should have a key and be a clamp fit around the rudder shaft. IOW, the quadrant is the correct diameter but some material is removed between the two haves so it clamps tight to the shaft. The key simply keeps it from spinning on the shaft.
Tim R.
Out cruising
1997 Caliber 40LRC

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