|
28-06-2016, 09:46
|
#1
|
Registered User
Join Date: Oct 2010
Location: Southeastern Alaska and Guatemala, Rio Dulce
Boat: 40 foot Schucker motorsailer and 46 foot Ted Brewer custom
Posts: 254
|
What grease for rudder shaft
I have my boats skeg now removed and see that the stainless rudder shaft fit in the skeg into a socket or cup without any cutless bearing. So question is what kind of grease should I put in shaft socket? It is below the water line and can only be greased if the skeg is removed.
Thank you all.
|
|
|
28-06-2016, 09:47
|
#2
|
Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
|
Re: What grease for rudder shaft
Nothing IMHO.
Grease down there will collect grit and actually accelerate the wear.
Sent from my iPhone using Cruisers Sailing Forum
|
|
|
28-06-2016, 10:06
|
#3
|
Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
|
Re: What grease for rudder shaft
Still, I like the idea of something to lubricate.
What about wax? As in Bee's wax melted on prior to assembly?
Many years ago in my bicycling days, we used to wax our chains by soaking a cleaned chain in molten wax, it lubricated well and was very clean, of course wax is very waterproof
|
|
|
28-06-2016, 10:10
|
#4
|
Registered User
Join Date: May 2011
Location: San Diego CA
Boat: Liberty 458
Posts: 2,205
|
Re: What grease for rudder shaft
You might like the idea of magic bycycle grease but heed the previous posters comment re grit. Wax is not waterproof when any load is applied. All it will do is trap water in a bycycle chain. Wax only coats the surface. Works well for bottles and corks.
Your rudder bearing is not subject to high speed rotational loading. Most greases will either wash away, change composition and collect or grow. None of which is going to help.
You do want to take opportunity to ensure the shaft and existing bearing are still in good condition. Rectify any wear. Water is a lubricant.
Sent from my SM-N900T using Cruisers Sailing Forum mobile app
|
|
|
28-06-2016, 10:29
|
#5
|
Registered User
Join Date: Sep 2011
Location: On a boat
Boat: 1987 Cabo Rico 38 #117 (sold) & 2008 Manta 42 #124
Posts: 4,174
|
Re: What grease for rudder shaft
Some rudder shafts are equipped with an injection point for grease. If you don't have one then you don't need it. May want to look a replacing the packing instead.
http://www.sailmagazine.com/diy/ask-...w-your-rudder/
|
|
|
29-06-2016, 11:59
|
#6
|
Registered User
Join Date: Sep 2015
Location: East Coast Florida
Boat: Chris Craft 38 Commander 1965
Posts: 482
|
Re: What grease for rudder shaft
If it has been some time since last repacking of the rudder gland or you notice that the nut is tightened down pretty much all the way then it is time to remove the rudder packing gland nut or cap and remove the old packing. The packing has it's own lubricant depending on what type your choose. Flax, PTFE etc. Even many of the flax ones have a PTFE "grease" embedded.
Once the nut is fully tightened down and your back in the water without replacing - the re-packing job just became a harder job - to replace the packing because the rudder has to be supported to prevent it dropping out while the cap nut is off. Can be done without fully removing but not much fun and takes much longer and with much more effort in most case.
While on the hard is the time to do this job.
|
|
|
29-06-2016, 16:06
|
#7
|
Registered User
Join Date: May 2016
Location: mackay, queensland. australia
Boat: e.a jack (builder), g.l watson (designer), 6.2 mtr wll sailboat
Posts: 532
|
Re: What grease for rudder shaft
doo you ride your tredly in the sea/salt water lube works ok
|
|
|
29-06-2016, 17:35
|
#8
|
Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
|
Re: What grease for rudder shaft
Quote:
Originally Posted by knockabout
doo you ride your tredly in the sea/salt water lube works ok
|
Is that a drunk type?
Sent from my iPhone using Cruisers Sailing Forum
|
|
|
29-06-2016, 17:55
|
#9
|
Moderator
Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 6,084
|
Re: What grease for rudder shaft
I wondered about this too when I built my boat. I used bee's wax, it being the stiffest lubricant I had sitting around. My rudder is about 2' by 5' and very heavy, on a 2" shaft. I removed it and the foot under it after five years, and found that the bee's wax had worked quite well, still there and no scoring from grit, despite an embarrassing number of soft groundings over those years.
|
|
|
30-06-2016, 23:23
|
#10
|
Registered User
Join Date: Apr 2007
Location: Australia
Boat: Island Packet 40
Posts: 6,451
|
Re: What grease for rudder shaft
I wonder how a mixture of bee's wax and powdered graphite would go in this application. One used to be able to buy powdered graphite at auto parts places.
|
|
|
01-07-2016, 00:35
|
#11
|
Registered User
Join Date: May 2008
Location: puɐןsuǝǝnb 'ʎɐʞɔɐɯ
Boat: Nantucket Island 33
Posts: 4,864
|
Re: What grease for rudder shaft
I used my old favourite, lanolin grease. Just reinstalled the rudder and it needed the grease to help it slide into place without rubbing anyhow. At any rate, I wouldn't expect the grease to last more than few years.
|
|
|
01-07-2016, 13:52
|
#12
|
Moderator
Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 6,084
|
Re: What grease for rudder shaft
If your rudder shaft was set on a lathe center and turned, you have the additional option of setting it on a ball bearing.
|
|
|
01-07-2016, 15:37
|
#13
|
Moderator
Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 6,084
|
Re: What grease for rudder shaft
You're talking about a shaft with an effective rotation of about 2 RPM, while your prop shaft is running 1,000 RPM after reduction in the gear box. You don't need a fancy lubricant for that, you just want to keep two pieces of metal from grinding against each other. Wax or a stiff grease will do that job just fine. The rotation of the shaft is not going to heat it up, making viscosity a problem, and your steering cylinder is dealing with the force against the side of the rudder. The shaft rotation is the least of its problems, so you are not really trying to reduce friction. The major task is getting something between the shaft and the cup when the force against the side of the rudder bends the shaft, ever so slightly, and rubs it against the side of the cup. Not rocket science, more like oxcart science.
|
|
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Rate This Thread |
Linear Mode
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Advertise Here
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
Vendor Spotlight |
|
|
|
|
|