Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 16-07-2009, 08:38   #1
Registered User

Join Date: Mar 2009
Location: Thorndale ON Canada
Boat: Gufstar Trawler 36' Sea Schooner
Posts: 13
Shaft Etching - Repair or Replace

When replacing cutlass bearing, Cleaning up the shaft is a good idea, how much etching can you remove / polish out on a 1 1/4" stainless shaft before it is logical to through it out and replace it? The Shaft is being spun By 85 HP diesel running at low power setting max 100 hours a year. Is there reasonable norms set. Any body have reference pictures?
__________________

Finner is offline   Reply With Quote
Old 16-07-2009, 08:47   #2
Registered User
 
scubasteve's Avatar

Join Date: Jun 2009
Location: Texas
Boat: Shamrock 246 Open
Posts: 54
I assume the etching is on the shaft where it makes contact with the cutlass bearing?

If you have concerns, take it to a prop shop that works on inboard running gear. They can evaluate the issue; check straightness and smooth out the etched area for much less than replacing the whole shaft.
__________________

scubasteve is offline   Reply With Quote
Old 16-07-2009, 09:27   #3
Registered User

Join Date: Mar 2009
Location: Thorndale ON Canada
Boat: Gufstar Trawler 36' Sea Schooner
Posts: 13
That is correct and it sounds like the rigth advice.
Finner is offline   Reply With Quote
Old 16-07-2009, 09:47   #4
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 38,198
Images: 241
I wouldn’t bother with trying to polish/buff a shaft that isn’t exhibiting undesirable symptoms (ie: leaking at gland), for mere aesthetic reasons.

Minor shaft scratches can be DIY hand polished, but deeper scoring or etching may require more sophisticated procedures (electropolishing).

Carefully* polish the shaft using “fine” wet/dry (300-500 grit silicon carbide) sandpaper or emery cloth working "radially" around the shaft. Afterward, wash the shaft thoroughly with fresh water to remove any residual traces of abrasive, and apply a light coat of grease to ease reassembly.

* Any mechanically produced surface (ground, polished, buffed, lapped, honed, etc.) produces a work hardened, disturbed and damaged grain layer approximately 0.001" thick.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
flexible shaft coupling for short shaft melemakani Propellers & Drive Systems 6 22-12-2015 06:16
Repair or Replace the Motor in My McMurray Anchor Windlass dwillows Anchoring & Mooring 5 04-09-2011 13:07
Repair or replace? MJWEENZ General Sailing Forum 12 13-02-2009 13:46
YouTube video on shaft packing 5 " shaft Roy M Propellers & Drive Systems 5 24-07-2008 09:07
Bent prop shaft, repair or replace Thistle Construction, Maintenance & Refit 6 30-05-2008 05:19

Advertise Here


All times are GMT -7. The time now is 05:35.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.