cutless bearing tolerence

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lowufo
Bottom Paint Application Technician
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Joined: Mon Aug 16, 2010 7:34 am
Boat Name: providence
Boat Type: bristol 32

cutless bearing tolerence

Post by lowufo »

How much play is acceptable in the prop shaft inside the cutless bearing .Ours moves about 1/16-1/8
Thanks
Maine Sail
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Re: cutless bearing tolerence

Post by Maine Sail »

That is a quite a bit of movement. The rubber on most bearings on sailboats is barely 1/8" thick and you say you can move your shaft that much? Ideally there should be no side to side or up / down slop. It should fit snug.
-Maine Sail

Canadian Sailcraft 36T
Casco Bay, ME
http://www.marinehowto.com
Tallystick
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Re: cutless bearing tolerence

Post by Tallystick »

Do you actually have 1/8-1/16 of empty space in the bearing, or can you deflect the shaft by that much at some distance out? How are you measuring this?
lowufo
Bottom Paint Application Technician
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Joined: Mon Aug 16, 2010 7:34 am
Boat Name: providence
Boat Type: bristol 32

Re: cutless bearing tolerence

Post by lowufo »

Thanks folks
I have that much play ,I had a fair amount of vibration also. maybe I can upload a video somehow or some pics
Quetzalsailor
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Re: cutless bearing tolerence

Post by Quetzalsailor »

I think a sixteenth of an inch of total wag is at the high end of plenty. When new there is not much slop that isn't the rubber itself flexing.

Lots of other reasons for vibration: alignment, slop, out-of-balance, critters on the prop or shaft, the engine and its accessories, loose mounts, broken mounts, bent shaft, corroded zincs.
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