Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 12-04-2016, 14:04   #16
Registered User

Join Date: Jan 2013
Posts: 203
Re: cutless bearing, I'm in deep trouble...

Is that threaded connection structural ?

My stern tube seals with O rings. I just had it out, to replace the ones up by the stuffing box.

The tube is between the two ends in open air.

Are you sure yours hasn't slipped up, into the hull.

PS: I slice the bearing and collapse it. I don't remove the housing.
__________________

__________________
twinboat is offline   Reply With Quote
Old 12-04-2016, 14:44   #17
Registered User

Join Date: May 2011
Posts: 42
Re: cutless bearing, I'm in deep trouble...

@dsanduril, female housing, I already drilled approx. 3 mm off the female housing. It is easily seen on the picture. These where damaged in the process of removing the bearing. STUPID! I now ordered the new female housing 250 US and I will see if it will go on. When I tried to put it on in the last attempt and after removing 3 mm of the housing tread it feels like it bites on and falls off after one round. I only assume that the tube tread is damaged. However that is what the engineer said. The situation can also be that the tread on the female housing can not go on and a new housing will solve the case. Im also concerned about the pink colour! Im also considering to find a steel pipe with a proper diameter and cut a tread on the inside of the pipe and try to see if it will go on. The hard and sharp tread might also repair the first couple of windings if they were damaged. I talked to HR and they confirmed that it needs to be cut off from outside. The boat is in Southampton UK, and if any of you can appoint a company or a professional who could come with second opinion, both on the pink stuff but also for re instalation of the tube, I would appreciate to get contact info


Sent from my iPad using Cruisers Sailing Forum
__________________

__________________
amarf is offline   Reply With Quote
Old 12-04-2016, 14:56   #18
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: South Pacific
Boat: Outremer 50S
Posts: 1,443
Re: cutless bearing, I'm in deep trouble...

Sorry, don't know anyone on that side of the pond. Dockhead, Atoll, and Boatman on this forum (and probably some others I don't know) are relatively local and might be able to make recommendations.

I did like the suggestion above that it could be the cutless bearing itself holding things slightly out of alignment. When you get the new housing try the installation first without the cutless bearing in place, that should allow a little but more latitude in alignment. Might even want to try that with the current unit (if you can get the bearing back out). If you can install it without the cutless bearing you might want to investigate alignment, or see of you can get a little play in the shaft by disconnecting inside the boat, installing the bearing housing, then re-connecting the shaft.

I only have a small amount of experience with de-zinced bronze, what I have seen is usually quite red/pink all the way through. You might hit the very end of the stern tube with some sanding to expose a fresh surface and see what it looks like. From the picture doesn't look terrible, but I am not a metallurgist.
__________________
Dsanduril is offline   Reply With Quote
Old 12-04-2016, 15:03   #19
Registered User

Join Date: May 2011
Posts: 42
Re: cutless bearing, I'm in deep trouble...

@jimbunyard you are right about the decentralising with the new rubber inside. Maybe I will try with the new housing without the bearing inside...


Sent from my iPad using Cruisers Sailing Forum
__________________
amarf is offline   Reply With Quote
Old 12-04-2016, 15:05   #20
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: South Pacific
Boat: Outremer 50S
Posts: 1,443
Re: cutless bearing, I'm in deep trouble...

You might have a look here:

Brass and Bronze

If you scroll down to about the middle of the page there is a good discussion on dezincification and lots of sample photos. And the general recommendation seems to be to expose fresh metal to make a real determination if the extent is large or just surface. This shot seems the most telling:

__________________
Dsanduril is offline   Reply With Quote
Old 12-04-2016, 15:30   #21
Registered User

Join Date: Sep 2013
Location: San Francisco Bay
Boat: Chung Hwa Boat Builders, Magellan 36
Posts: 262
Re: cutless bearing, I'm in deep trouble...

What about replacing stern tube with G-10. Available from McMaster Carr. No more de-sinking issues. No threads. Just epoxy in place
__________________
foufou is offline   Reply With Quote
Old 12-04-2016, 18:09   #22
Registered User

Join Date: Oct 2015
Location: Summerstown Ontario Canada
Posts: 236
Re: cutless bearing, I'm in deep trouble...

The thread on the bearing housing is badly damaged and a new housing should be fitted. The stern tube thread is also damaged and is pink due to dezincification and is weak and spongy.

Bring your fitting to a plumber to try and match a die. Probably has a tap and die to clean and straighten the threads.
__________________
seabreez is offline   Reply With Quote
Old 25-04-2016, 10:43   #23
Registered User

Join Date: May 2011
Posts: 42
Re: Cutless Bearing, I'm In Deep Trouble...

Thanks for all input, /the new housing arrived and it went on with no probs. One question more, Do I need to pack&seal the thread or is it going on without anything_


Sent from my iPad using Cruisers Sailing Forum
__________________
amarf is offline   Reply With Quote
Old 25-04-2016, 10:53   #24
Registered User

Join Date: Jul 2011
Location: Atlantic ICW 29N/81W
Boat: Beneteau Oceanis 36CC, now sold
Posts: 817
Re: Cutless Bearing, I'm In Deep Trouble...

Quote:
Originally Posted by amarf View Post
Thanks for all input, /the new housing arrived and it went on with no probs. One question more, Do I need to pack&seal the thread or is it going on without anything_


Sent from my iPad using Cruisers Sailing Forum
GOod news! Now invoice yourself $1000 for services rendered, dispute the charge and go spend the money thus saved!
__________________
Robin3 is offline   Reply With Quote
Old 25-04-2016, 15:14   #25
Registered User

Join Date: Jan 2013
Posts: 203
Re: Cutless Bearing, I'm In Deep Trouble...

They should be tight and sealed.

Tight so vibration doesn't wear the threads.

Sealed so it don't leak water.
__________________

__________________
twinboat 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
Cutless Bearing In Fiberglass Shaft Tube Noreastern Engines and Propulsion Systems 8 12-06-2014 20:48
Cutless Bearing Issue? (Newb boat owner) Steve Olson General Sailing Forum 3 27-01-2014 00:31
Cutless bearing shell material Troubadour52993 Propellers & Drive Systems 15 09-04-2013 22:06
Cutless bearing, flex coupling and PSS packing gland thaisail Propellers & Drive Systems 34 08-04-2013 12:21
Does cutless bearing life vary depending on initial rubber thickness? jaffadog Construction, Maintenance & Refit 13 26-01-2012 07:12



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:41.


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.