Keel Bolt Torque - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 05-05-2003
Senior Member
 
Join Date: Dec 2002
Posts: 552
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
GordMay is on a distinguished road
Keel Bolt Torque

C&C Specifies 250 Ft/Lbs torque for 3/4" Keel Bolt c/w 1-1/8" Nut.
Does this assume boat on the hard, sitting on keel?
Would the required torque be different for a boat afloat?
Tks,
Gord
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 05-05-2003
Senior Member
 
Join Date: Jul 2001
Posts: 459
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 14
DuaneIsing is on a distinguished road
Keel Bolt Torque

Gord,

Here is my opinion on your keel bolt torque question:

Whenever threaded fasteners are used to join components, the designer is trying to achieve a desired clamping force by putting the bolt (screw, etc.) in tension. Since measuring the tensile force in the bolt is difficult to do, engineers specify torque values. However, the amount of tensile force in the bolt for a given torque value varies greatly depending upon the condition/geometry/material of the threads, their cleanliness, and degree of lubrication.

To your question, if all the above factors were equal, it should not matter whether the boat is on the hard or in the water. The resultant clamping force should be the same for the same torque value. To use a different value for the torque would imply that you need a different clamping force under those two conditions and I don''t see that as logical.

Hopefully folks with real boat experience will agree.

Duane
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 05-07-2003
Member
 
Join Date: Jan 2002
Posts: 38
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
lecomte38 is on a distinguished road
Keel Bolt Torque

TIGHT. as tight as you can make them with 1/2" drive sockets and a breaker bar.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fixed or swing keel, which is better? TimG2 General Discussion (sailing related) 17 07-30-2014 10:23 AM
Fin Keel or Shoal Keel acmecoyote General Discussion (sailing related) 11 05-06-2011 05:39 PM
reducing keel/adding fin? abacosol Gear & Maintenance 9 07-01-2007 10:32 PM
Keel Anxiety! Spang Boat Review and Purchase Forum 8 06-19-2006 04:09 PM
Short Keel vs Normal SEAJM General Discussion (sailing related) 1 03-12-2003 03:13 AM


All times are GMT -4. The time now is 08:25 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.