Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 19-02-2010, 11:45   #1
Senior Cruiser
 
schoonerdog's Avatar

Cruisers Forum Supporter

Join Date: May 2004
Location: annapolis
Boat: st francis 44 mk II catamaran
Posts: 1,174
Images: 4
Has Anyone Used Grade 70 Chain with a Lofran Tigres?

trying to see if it's compatible. If you have used it, please let me know the vendor of the chain you used. Thank you!

Doug
__________________

schoonerdog is offline   Reply With Quote
Old 19-02-2010, 22:08   #2
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Hi Doug,

We use ACCO 3/8" grade 70 chain on our Maxwell windlass. This chain has the same links as the ACCO 3/8" grade 40 HT chain. But I guess you're looking into 5/16" chain... I think it is also the same as the grade 40 HT but can't be sure as I never used it myself.

cheers,
Nick.
__________________

__________________
s/v Jedi is offline   Reply With Quote
Old 26-02-2010, 04:16   #3
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
G70 is a very brittle grade of metal and won't provide any deformation before sudden breakage. Also, I don't think it can be hot-dipped galvanized, leaving it more poorly galvanized than most chain.

What kind of loads are you expecting at anchor, or do you just want to go with very small size chain? G40 will most likely break another part of your anchor system before the chain goes.

GMac here used to warn against G70 chain for anchoring, but I haven't seen him post in quite a while.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 26-02-2010, 07:25   #4
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Mark,

your info is wrong. Jedi has had G70 hot dip galvanized since her launch in 1994 and Dashew's original Sundeer before that. It used to be special order from ACCO but it's now even listed in the West Marine catalog.

My 3/8" G70 held Jedi (25 tons metric, 27 US) during hurricane Ivan with 120 knots sustained wind and without any visible damage. At the same time, the 5/8" shackle got elongated but didn't break either. We replaced the chain for a new one and upgraded to 3/4" shackle.

All the Sundeers have G70 chain. The 56' and 60' versions have 5/16" and I never heard about any trouble with the chain.

You are right that it is much harder (which is another way of saying more brittle) than G40 but it is also much stronger, taking much more tension than grade40 before breaking.
The only negatives are higher price and re-galvanizing isn't advised.

cheers,
Nick.
__________________
s/v Jedi 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
Lewmar H3 vs Lofrans Tigres windsaloft Anchoring & Mooring 12 27-07-2012 15:59
Want To Buy: Lofrans Tigres Windlass Motor ouat41 Classifieds Archive 3 18-03-2010 20:09
Which Do You Select: Marine-Grade or Consumer-Grade ? RubyBishop Marine Electronics 21 01-02-2010 20:25
What Grade of Aluminum for Masthead Arm? Patrick_DeepPlaya Construction, Maintenance & Refit 5 11-01-2010 12:35
Single grade oil? Han Engines and Propulsion Systems 18 10-12-2007 18:48



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:32.


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.