Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 18-02-2012, 03:39   #1
Registered User
 
bigpuff's Avatar

Join Date: Jan 2010
Location: picton N.Z.
Boat: Jeanneua 36
Posts: 159
Images: 46
Shortening a Prop Shaft !!!!!!!

i want to cut a inch of the prop shaft suround and cutless bearing so i can get a standard shaft zinc on the shaft'shes a beneteua 411,any sugestions
__________________

__________________
bigpuff is offline   Reply With Quote
Old 18-02-2012, 04:00   #2
Registered User
 
SteveT's Avatar

Join Date: Aug 2011
Location: Portishead UK
Boat: Dudley Dix Hout Bay 33
Posts: 139
Re: shortening a prop shaft !!!!!!!

Probably not a good idea to cut away the surround. If your shaft design does not allow a zinc to be fitted to the tail end and you are bound and determined to have a zinc on your shaft you could always get a slightly longer shaft fitted. Is there any reason you feel you need a zinc on the shaft? Has your propeller shown evidence of galvanic corrosion?
__________________

__________________
SteveT
Somewhere at sea
SteveT is offline   Reply With Quote
Old 18-02-2012, 15:40   #3
Registered User

Join Date: Mar 2009
Location: Australia, Central Coast.
Boat: Boden 36 Triple chine long keel steel, named Nekeyah
Posts: 777
Re: shortening a prop shaft !!!!!!!

If you have any room at all, have you thought about buying say 10 standard anodes and taking them to a machine shop to be shortened. If you spread the set-up cost over the 10 units then your cost per unit should be reasonable and you should have enough to last a while.
Regards,
Richard.
__________________
boden36 is offline   Reply With Quote
Old 19-02-2012, 00:09   #4
Registered User
 
bigpuff's Avatar

Join Date: Jan 2010
Location: picton N.Z.
Boat: Jeanneua 36
Posts: 159
Images: 46
Re: shortening a prop shaft !!!!!!!

you,s are both right;i have been getting anodes recut and probibly will carry on doing so;i fitted a kiwi prop some years ago(like it very mush)its about 2in. longer on the shaft then my old fixed prop so the end of my cutless bearing and shaft surround is pretty close to the aft end of the kiwi prop housing.thanks for your suggestions.i was thingking of putting a solid s/s plate inbetween the gearbox end and front of the shaft connection as its a solid plat against plate.t.y. again for your replys bill.
__________________
bigpuff is offline   Reply With Quote
Old 19-02-2012, 00:41   #5
Marine Service Provider

Join Date: Feb 2007
Posts: 81
Images: 1
Re: shortening a prop shaft !!!!!!!

Unless you want be replacing bearings more often and getting more noise and vibration, bearing length should be kept as it is. Gap from aft end of bearing to prop should be kept to a minimum for the same reason. (shaft OD is OK)

Fora soft mounted drive our worse case movement and clearance is 9.00mm forward movement and leave a 3.0mm gap for water to exit bearing. So make sure you have 12.00mm gap.

Hull anode might be the best option.
__________________
4HMainer is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Propeller Shaft Ringing sailorbill Propellers & Drive Systems 12 24-02-2012 23:32
Shortening a Prop Shaft !!!!!!! bigpuff Propellers & Drive Systems 4 19-02-2012 00:41
Installing Engine Shortening Shaft bcguy Propellers & Drive Systems 1 18-02-2012 17:26
How to Move a Prop Shaft Back Erik Stelwagen Propellers & Drive Systems 11 12-02-2012 21:55
Shaft Log Question endoftheroad Construction, Maintenance & Refit 8 10-02-2012 01:59



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:18.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.