Turnbuckles - Stainless versus Aluminum - SailNet Community
 
LinkBack Thread Tools
post #1 of 10 Old 10-05-2007 Thread Starter
Senior Member
 
Finallybuyingaboat's Avatar
 
Join Date: Aug 2007
Posts: 157
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Turnbuckles - Stainless versus Aluminum

Okay, $50 for marine grade turnbuckle versus $5 for aluminum at Home depot. Home depot one rated for 400lbs. How much better is that marine grade turnbuckle. (I am dealing with a $500 sailboat that is 23 feet long.) Will the side stays require more than a 400 lb durability ?
Finallybuyingaboat is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 10 Old 10-05-2007
Larus Marinus
 
Idiens's Avatar
 
Join Date: Jan 2007
Location: Brussels
Posts: 1,756
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Yes. Holding a mast up is hard work.
Idiens is offline  
Quote Quick Reply Share with Facebook
post #3 of 10 Old 10-05-2007
Shaken-not Stirred
 
capngregg's Avatar
 
Join Date: Feb 2007
Location: Carrollton, Texas
Posts: 118
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Cool

Fresh water sailing? Not so bad from a corrosion standpoint. I'm guessing you'll be using the turnbuckles for the stays? If that is so, gust loading could exceed the working value of the aluminum turnbuckle followed by disaster.

I got my 22' swing keel boat free but it is best to invest in the proper hardware from a safety standpoint (possible demasting situation) and with respect to the cost of replacing a broken mast.

Turnbuckles are one of the cheaper items when it comes to hardware.

I should read more carefully- you did say for the sidestays. Sorry.

Opportunity is missed by most people because it is dressed in overalls and looks like work.
T.A.E.

Last edited by capngregg; 10-05-2007 at 04:34 PM. Reason: Note
capngregg is offline  
Quote Quick Reply Share with Facebook
post #4 of 10 Old 10-05-2007
Junior Senior
 
heinzir's Avatar
 
Join Date: Jul 2000
Location: Lake Minnetonka (near Minneapolis, Minnesota)
Posts: 247
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 16
 
Absolutely! The turnbuckle should match the strength of the rigging wire. 1/8" SS wire has a breaking strength of 2200 lbs and 5/32" wire is rated at 3300 lbs. How much does your boat weigh? When the boat is heeled way over in a blow the strain on the shrouds could conceivably be as much as the boat weighs! Of course this is distributed between the upper and lower shrouds, and there are other factors involved. But clearly 400 lbs is not nearly strong enough.

I am presupposing your boat is a small trailerable cruiser weighing 2000 - 4000 lbs. If it is a daysailer weighing much less you might be able to get by with the lower strength turnbuckle. Much will depend on how large the sail area is.

Also, what are the consequences if the turnbuckle breaks and the mast comes down? Would it be just an inconvenience or would it be a major disaster? Could anyone get hurt?

Henry
Chiquita
heinzir is offline  
Quote Quick Reply Share with Facebook
post #5 of 10 Old 10-05-2007
Señor Member
 
TrueBlue's Avatar
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,858
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
     
I agree that you should not compromise in this area. But if finances are that tight, get down to your local marine consignment store and pick up a set of stainless fittings at bargain prices.

Most coastal areas with a concentration of boating activities have one or two of these places. There are three or four within five miles in my area - bins and bins of used sailing hardware at each place - a sailing flea market.

True Blue . . .
sold the Nauticat
TrueBlue is offline  
Quote Quick Reply Share with Facebook
post #6 of 10 Old 10-05-2007
Seinor Member
 
capn_dave's Avatar
 
Join Date: Feb 2000
Location: Green Cove Springs, FL
Posts: 276
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 17
 
GO with the Aluminum ones

Take a Video Camera and we all can watch you on You Tube. Title your next post

Hey Ya'll watch this!!!!!

Fair Winds

Cap'n Dave
I sail Therefore I ARRRRRrrrrrr
capn_dave is offline  
Quote Quick Reply Share with Facebook
post #7 of 10 Old 10-05-2007 Thread Starter
Senior Member
 
Finallybuyingaboat's Avatar
 
Join Date: Aug 2007
Posts: 157
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Hmm, hadn't realized the stresses on the side stays were that high. Would probably strip the threads right out of an aluminum turnbuckle in a hurry. Stainless it is then.

Not really a budget issue, but it seems so many items when purchased for "Marine" purposes have elevated prices when compared to standard duty products. In many cases this can be explained, in others....

Last edited by Finallybuyingaboat; 10-05-2007 at 07:11 PM.
Finallybuyingaboat is offline  
Quote Quick Reply Share with Facebook
post #8 of 10 Old 10-05-2007
ASA and PSIA Instructor
 
Join Date: Apr 2000
Posts: 3,667
Thanks: 10
Thanked 30 Times in 30 Posts
Rep Power: 17
 
Not SS

Quote:
Originally Posted by Finallybuyingaboat View Post
Hmm, hadn't realized the stresses on the side stays were that high. Would probably strip the threads right out of an aluminum turnbuckle in a hurry. Stainless it is then....
I think you'll find the marine turnbuckles are actually made of bronze, or a bronze alloy, often chrome plated. They provide a good example of why boat stuff costs a lot, as they are subject to a lot more stress usually in a salty environment than the turnbuckles used around the house.
sailingfool is offline  
Quote Quick Reply Share with Facebook
post #9 of 10 Old 10-05-2007
Shaken-not Stirred
 
capngregg's Avatar
 
Join Date: Feb 2007
Location: Carrollton, Texas
Posts: 118
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
Cool

Boats, Trains and Airplanes (etc) all have let's say a "unique" pricing structure. TB is right on - there are plenty of surplus marine equipment houses around-give it a whirl on Google and you'll be amazed.

Some of the pricing is acceptable and some is just plain ridiculous, liability or not.

What kind of boat did you end up getting?

Opportunity is missed by most people because it is dressed in overalls and looks like work.
T.A.E.
capngregg is offline  
Quote Quick Reply Share with Facebook
post #10 of 10 Old 10-05-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 17 Times in 13 Posts
Rep Power: 15
         
You really don't want to use aluminum turnbuckles on a sailboat. Aluminum, aside from the corrosion issues, has one other issue that makes it extremely unsuitable for sailboat rigging, which is dynamic in nature rather than static—fatigue. Aluminum will fatigue under the loading and unloading cycles as your boat tacks and gybes. Stainless steel has to be strained beyond a certain point before it starts to fatigue. The turnbuckles will fail without any warning once they pass the fatigue limits of the material they're made of.

You really need to get marine grade stainless steel or bronze turnbuckles.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply 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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
cleaning aluminum water tank rbtpfe9 Gear & Maintenance 18 12-27-2010 11:31 AM
Stainless 101 sailnaway Gear & Maintenance 2 01-28-2005 05:02 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