shaft coupling - SailNet Community
LinkBack Thread Tools
post #1 of 2 Old 08-14-2006 Thread Starter
Junior Member
Join Date: Mar 2000
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
shaft coupling

I cannot remove coupling from the end of my prop shaft. Have tried all means.Pullers,heat,chemicals. It's gaulded for 30 years.
Is there a small cutter? I need to replace the rubber hose at the stuffing box.
Is there a stuffing box that doesn't require this hose?
shaft is 1 1/2 stainless
Boat is a Whitby 42 1974
clifsail is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
post #2 of 2 Old 08-15-2006
Senior Member
sailandoar's Avatar
Join Date: Mar 2006
Location: Cape Fear, NC, USA
Posts: 208
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
Heat => Puller

Elaborate on the pullers used!

The most common and most effective puller is usually a spacer ( e.g. large nut ) set between the shaft ends and then using longer bolts ( fine thread / grade 8) one puts a strain on the assembly. At some point there is a danger of warping one or both coupling flanges but in normal cases this is not a problem and such an approach is SOP. It is safest in an extreme case to make a plate of 1/2" to 3/4" steel with holes drilled to match the coupling to be removed and then do the spacer-long bolt trick. Heat generally must be applied HOT and QUICK so as to heat the coupling and not the shaft and thereby expand only the coupling. One can improve the effect by packing the shaft coupling in ice ( or ice&salt) to get as cold as possible before applying heat. Generally an oxy-acetylene torch is needed as a propane torch heats to slowly to confne the heating to the coupling. Be sure that there are no pins or set screws lurking under a coating of corrosion. It has happened to many that they swore and pounded and heated and pulled and pushed, only to find out that it was pinned or set screwed.

If the shaft must be saved and the coupling is GLUED on, one can cut the coupling down one or both sides as close to the shaft as possible and tap the thin layer of metal with a sharp cold chisel to expand it a bit or use a grinder to cut just through to the shaft and so loosen the coupling. No fun when staning on your head with near zero clearance on all sides but do-able in a pinch.

Last edited by sailandoar; 08-15-2006 at 02:11 PM.
sailandoar is offline  
Quote Quick Reply Share with Facebook

Quick Reply

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Proper shaft alignment Joshua Dawn Gear & Maintenance 20 12-13-2009 04:17 PM
Shaft replacement or ''the shaft''? foxglove Gear & Maintenance 4 08-18-2006 11:16 PM
prop shaft thomasstone Gear & Maintenance 3 03-27-2002 03:03 PM
shaft position concerns Morgan OI 41 sailnby Gear & Maintenance 4 01-13-2002 09:20 AM
prop shaft coupler thurston Gear & Maintenance 2 12-31-2001 06:00 AM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome