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Spiritofcuttysark 02-02-2011 10:08 PM

zinc annode grinding
 
Newly purchase older boat with 1" shaft. Need to reduce shaft collar zinc annode profile size by 4mm each side. Should this be done on lathe or other suggestions?

CalebD 02-02-2011 11:11 PM

Ok, I'll admit it. I usually grind down a 1" collar zinc for our shaft about once every 2 years, as needed. We only have a clearance of around 1/2" between the prop and the cutlass bearing on our old Tartan 27.
I looked into the 'drive savers' but since zincs are cheaper I keep grinding them down with: a grinding wheel, a 4-1/2" grinder and breathe zinc dust now and then.
Not much fun and there has to be a better way.

Fstbttms 02-02-2011 11:29 PM

Quote:

Originally Posted by Spiritofcuttysark (Post 693876)
Newly purchase older boat with 1" shaft. Need to reduce shaft collar zinc annode profile size by 4mm each side. Should this be done on lathe or other suggestions?

What is the width of clear shaft you are dealing with?

MARC2012 02-03-2011 06:14 AM

Are you using an egg or a donut?marc

scottyt 02-03-2011 12:08 PM

I have a small metal lathe, if some one needs to they can send me a few zincs and tell me how small they need them. i will turn them down to what ever size they need.

just pay shipping both ways.

sailingdog 02-03-2011 12:40 PM

You could also just grind them down a bit with a belt sander.

mitiempo 02-03-2011 12:46 PM

Or cut them in half to make 2.:)

sailingdog 02-03-2011 01:02 PM

Quote:

Originally Posted by mitiempo (Post 694051)
Or cut them in half to make 2.:)

Depends on whether it has four bolts holding it together or just two... if it has four, then that would work, if just two, probably not going be worth doing.

mitiempo 02-03-2011 01:08 PM

True

Fstbttms 02-04-2011 11:45 AM

Quote:

Originally Posted by sailingdog (Post 694057)
Depends on whether it has four bolts holding it together or just two... if it has four, then that would work, if just two, probably not going be worth doing.

1" shaft zincs do not have 4 screws, regardless of brand, so this is a moot point.

I have used a hacksaw to shave zincs and more recently, a portable band saw. That makes quick work of the job.


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