Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 31-08-2011, 06:14   #1
Registered User
 
LIsailor's Avatar

Join Date: Jan 2011
Location: Greenlawn, NY
Boat: Sabre 36
Posts: 58
Adding Rope Clutch to Mast

I want to make a base plate for a double rope clutch or should I just mount two.
Any recommendations on base blare material and procedure of how to create the mast profile?
__________________

__________________
LIsailor is offline   Reply With Quote
Old 31-08-2011, 13:31   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,745
Images: 9
Re: Adding Rope Clutch to Mast

LIsailor it is a difficult question to answer without knowing the profile of the mast. I have single clutches on my boat and the bases are all nylon so I don't have to worry about dissimilar metal corrosion. I drill and tap the holes then mount them. A real nice tool for doing this is the self centering drill bit Drills, Drivers, & Bits | Bits-Woodworking | Self-Centering Hinge Bit (No. 8 & 10 Screws) | B249572 - GlobalIndustrial.com I tap the first hole. Then use the self centering bit to find the exact location for the second hole. It has not failed me yet. BTW I know nothing about this company it is just an example of the tool.
__________________

__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Old 31-08-2011, 14:21   #3
Registered User
 
LIsailor's Avatar

Join Date: Jan 2011
Location: Greenlawn, NY
Boat: Sabre 36
Posts: 58
Thanks Charlie for the info. That bit looks great.
My question to clarify was really about the base plate. The mast is a decent size and the shape, while curved, is close to flat.
As an example, I was considering using a piece of ipe (iron wood), cutting the profile to on side using multiple passes on a table saw at different blade heights to make the profile. then sanding to cleanup the curve.
I was curious if anyone had another or better approach. Or a source for some sort of universal plate for clutches. I have found one for winches.
__________________
LIsailor is offline   Reply With Quote
Old 31-08-2011, 14:29   #4
Registered User
 
pressuredrop's Avatar

Join Date: Apr 2009
Location: West Palm Beach
Boat: Allied Seawind 30
Posts: 792
Re: Adding Rope Clutch to Mast

i am going to make epoxy bases from the winches on my mast, i intend to do it as follows:

-wrap mast in visqueen or 1 layer of thin plastic, maybe an 18" section so i can make a big blank and cut out a few bases
-make dams out of cardboard, plastic, anything handy on the 4 sides, tape them to the mast/plastic
-mix up some epoxy, mix in cabosil, pour in the half section mold...
-pop piece off of mast and mark the templates on the flat top surface.
-cut and install pieces...

same will work for a rope clutch...
__________________
pressuredrop is offline   Reply With Quote
Old 31-08-2011, 14:29   #5
Registered User

Join Date: Sep 2010
Location: Stuart, FL
Boat: Kanter 52' cutter
Posts: 126
Images: 4
Re: Adding Rope Clutch to Mast

Mount clutches directly on the mast, drill and tap holes and seal with tef-gel to prevent corrosion between mast and fasteners.

Wood is not advisable- you are inserting a softer material between two metal objects that you essentially want to weld together.
Fair winds!!!
__________________
sailnautilus is online now   Reply With Quote
Old 31-08-2011, 14:39   #6
Registered User
 
LIsailor's Avatar

Join Date: Jan 2011
Location: Greenlawn, NY
Boat: Sabre 36
Posts: 58
Sailnautilus
Good point about the wood. Partly why I was considering ipe beyond it's high resistance to rot (like teak but harder)

Which brings me to:
PressureDrop
Great idea! Duh. I've recored decks, vacuum bagged, an many other glass/resin based projects. Why didn't I think of that? On top of that I presently have my mast horizontal. Perfect.
One thing I'd add or consider. Maybe add some chopped glass to the mixture to make it a little more solid. To fight the pulling stresses the screw pressure will cause against the curved surface.
Thanks!
__________________
LIsailor is offline   Reply With Quote
Old 31-08-2011, 15:06   #7
Senior Cruiser
 
hpeer's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: Philadelphia
Boat: Murray 33-Chouette & Pape Steelmaid-44-Safara-both steel cutters
Posts: 3,895
Re: Adding Rope Clutch to Mast

I just did this.

I got some 1/4" aluminium sheet and some 3" channel.

I cut the channel to the length of the jammers, they were 3" wide so that worked.

I cut the plate to the right length and about 8" wide then bent it to the profile of the mast using a hydraulic conduit bender.

I cut the channel down so that it sat on the crown of the bend and welded it to the plate.

This gave me a flat surface for the jammers about a 1/2" higher than normal.

I tapped the aluminum channel and plate to connect the jammers.

I used a rivet with an internal thread to put threads in the mast.

I screwed the whole shegan to the mast.

My thought is that this will reinforce the mast rather than weaken it.

No pics but I can post some next week if you are interested.

You just have to promise to not laugh at my Shreck welds.

Shreck = strong but ugly.
__________________
hpeer is online now   Reply With Quote
Old 31-08-2011, 19:36   #8
Registered User

Join Date: Mar 2011
Location: Miami
Boat: Explorer 45
Posts: 75
Send a message via Skype™ to Brazil
I would consider using starbord. If the curve is not much a table belt sander is a good option to give the shape. Harbor freight has it cheap.
__________________
Brazil is offline   Reply With Quote
Old 31-08-2011, 20:34   #9
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Re: Adding Rope Clutch to Mast

If you can find this style tap, it is the best for tapping aluminum. Be sure to use cutting fluid, which for aluminum is cutting oil and water.
- - As "sailnautilus" posted use "Tefgel" or a similar product "Lanacote" on the threads of your machine screws (bolts) when installing them in the mast.
Attached Thumbnails
Click image for larger version

Name:	Spiral-Flute-Tap-2PJA9_AS01.JPG
Views:	208
Size:	3.9 KB
ID:	31032  
__________________
osirissail is offline   Reply With Quote
Old 31-08-2011, 21:31   #10
Registered User

Join Date: May 2008
Posts: 1,965
Re: Adding Rope Clutch to Mast

It's usually stronger to mount directly to the mast and minimize the length of screw that is subject to a bending force.

I just drill, tap and use plenty of tef-gel. I also cut a piece of UMWH tape to the shape of the hardware base plus 1/8". This stops electrolysis (if the hardware is stainless) and also protects any mast paint from tiny scratches that give water a chance to work in.

Amazon.com: UHMW SLICK TAPE - 3" X 36" BY PEACHTREE WOODWORKING PW1117: Everything Else

Carl
__________________
CarlF is offline   Reply With Quote
Old 06-09-2011, 20:03   #11
Senior Cruiser

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Tasmania
Boat: VandeStadt IOR 40' - Insatiable
Posts: 2,317
Images: 91
Re: Adding Rope Clutch to Mast

If drilling and tapping the mast I'd advise using helicoil inserts to reduce the chance of stripping the threads in the (relatively soft) aluminium. Always use an appropriate anti-corrosion compound wherever you are putting stainless steel in contact with aluminium - Duralac or similar.
__________________
Weyalan is offline   Reply With Quote
Old 12-09-2011, 18:33   #12
Registered User
 
LIsailor's Avatar

Join Date: Jan 2011
Location: Greenlawn, NY
Boat: Sabre 36
Posts: 58
Re: Adding Rope Clutch to Mast

There is a great deal on a pair of Spinlock XAS single clutches. I have decided to go with 2 singles. I was originally looking to go with XTS but I think the XAS would be more than sufficient for my purpose. The boat is a 1985 Sabre 36. Am I wrong?
__________________
LIsailor is offline   Reply With Quote
Old 13-09-2011, 17:08   #13
Registered User
 
LIsailor's Avatar

Join Date: Jan 2011
Location: Greenlawn, NY
Boat: Sabre 36
Posts: 58
Re: Adding Rope Clutch to Mast

I am having trouble differentiating the difference between the XAS and XTS other than maximum working load.
__________________
LIsailor is offline   Reply With Quote
Old 13-09-2011, 18:56   #14
Senior Cruiser
 
osirissail's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: A real life Zombie from FL
Boat: Gulfstar 53 - Osiris
Posts: 5,416
Images: 2
Re: Adding Rope Clutch to Mast

The load factor is the difference. The XTS series is heavier and stronger than the XAS series. If you have a small boat your line loads are normally smaller and you don't need the heavier, beefier XTS. On a larger boat the line load are considerably higher so using a XAS would be risking possible failure of the unit, which is something you don't need when out in a blow.
__________________
osirissail is offline   Reply With Quote
Old 20-09-2011, 06:28   #15
Registered User
 
LIsailor's Avatar

Join Date: Jan 2011
Location: Greenlawn, NY
Boat: Sabre 36
Posts: 58
Just got a great deal on 2 XCS clutches. Thanks for all the input.
__________________

__________________
LIsailor is offline   Reply With Quote
Reply

Tags
clutch, mast

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
Mast Came Down, Must Repair Acedude Construction, Maintenance & Refit 7 30-08-2011 14:01
Using a Windlass to Haul Someone Up the Mast callistov42 Deck hardware: Rigging, Sails & Hoisting 15 30-08-2011 08:28
Adding a Mainsail Furler VirtualVagabond Deck hardware: Rigging, Sails & Hoisting 26 10-07-2011 04:34
For Sale: Sailboat Mast Extrusion vientoman Classifieds Archive 0 06-07-2011 12:51
For Sale: 58' Tall Mast / 34' Tall Mast thesparrow Classifieds Archive 0 13-06-2011 13:07



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:17.


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.