mounting a boom bail

[fiestaMojo]

I'm mounting a bail on my boom to install a boom vang, and thinking using a thru-bolt with a sleeve would be best. . . question - how do I buy these? if I'm using 3/8" bolt is there a standard aluminum sleeve made for this purpose? thanks for any advice. . .

 

[Charlie Jones s/v Tehani]

Nope
You have to find a tube that fits the bolt, and cut it to the correct length. Called a"compression tube" by the way.

 

[onecoolair]

I'm mounting a bail on my boom to install a boom vang, and thinking using a thru-bolt with a sleeve would be best. . . question - how do I buy these? if I'm using 3/8" bolt is there a standard aluminum sleeve made for this purpose? thanks for any advice. . .

Try a few of these links.......The reason you want an internal rolled sleeve is so that the boom does not get squeezed or kinked. Causing a collapse of the boom extrusion.

http://www.aluminumspacers.com/?gclid=CMblxfjlm7YCFQmFnQodiVgA3A

http://www.eckomarine.com/Other-UNIVERSAL-ALUMINUM-SPACER-BUSHING-detail.htm?productId=10054553

http://www.wholesalemarine.com/p/KMI-6100-1-2/

http://compare.ebay.com/like/330892403909?_lwgsi=y&ltyp=AllFixedPriceItemTypes&var=sbar

 

[Joe]

Here's a thread from many years ago discussing boom vangs..... scroll down to MJ's post #6. He gives an excellent tutorial on how to mount a boom bale. http://forums.sbo.sailboatowners.com/showthread.php?t=22519

 

[Ron20324]

You might find a "shouldered" bolt of SS in the right size somewhere. I used a stop nut on mine, and it does not compress on the boom (no sleeve). Put nylon washers between the boom and bail.

 

[rardiH36]

You might find a "shouldered" bolt of SS in the right size somewhere. I used a stop nut on mine, and it does not compress on the boom (no sleeve). Put nylon washers between the boom and bail.

This describes the boom bale attachment method used by Hunter for the original boom on my 1980 Cherubini Hunter 36. I duplicated when I added a boom bale for a boom vang several years ago after buying the boat. The stop nut is the type that has a nylon insert within it.

Always mystified me that PO's never felt the need for a boom vang ... and sailed the boat "vangless" for a total of 28 years!

 

[fiestaMojo]

thanks for all the replies!

 

[Johnnie Walker Black]

and how are we getting the sleeve inside the boom again?

 

[Joe]

and how are we getting the sleeve inside the boom again?

You don't........ Here's the explanation, quoted from response #6 in the link I provided earlier in this thread:

As far as the connecting the hardware, what I suggested is, from what I understand, standard in the rigging industry and is the correct method. You drill the hole to fit the compression tube; cut the tubing so that the ends of the tube are flush with the boom; insert the bolt in the tube and (with the bale in place) place the assembly through both of the holes in the boom and bolt into place. I would also install some plastic washers between the bale and boom to eliminate damage to the boom. Your method has problems in that the dis-similar metals will cause corrosion in the aluminum boom and eventually the hole will become bigger and the screw will come loose. Also you are relying solely on the strength of the screw. There is a lot of load on the boom vang.

 

[Ron20324]

I'm mounting a bail on my boom to install a boom vang

Once I got the vang bail figured out, I put another one at the aft end of the boom to facilitate lifting things from the water with the topping lift as a crane. You can hang a dinghy from it overnight.