Halyard turning blocks

[Carver13014]

Hi,

I am planning to run my main halyard back to the cockpit this season on my O'day 25. I'm wondering what the working loads are that I need to consider when purchasing the blocks I need. I'm thinking something in the 600 lb. range should be sufficient.

Greg

 

[Nereussailor]

go to www.garhauer.com and check out their site. they have a list of specs that you can look at, and their products are great you should be able to use the series 25's on your boat. (It's the smallest that they make) You would be surprised at the load a turning block has on it. I wouldn't try to use anything smaller than that.

 

[Alan]

I agree, Garhauer is a great place to buy. Whatever you do I would definitely choose ball bearing blocks not the standard sheave/axle. Reducing friction as much as possible will make you life easier in the long term.

 

[sailingdog]

It depends... the ball bearing blocks aren't as good for things that are primarily statically loaded as the ball bearings can deform. For halyards, generally blocks with sleeve bearings are probably a better choice... but on a boat as small as the OPs it really doesn't matter.

I agree, Garhauer is a great place to buy. Whatever you do I would definitely choose ball bearing blocks not the standard sheave/axle. Reducing friction as much as possible will make you life easier in the long term.

 

[Barnacle Bill]

The halyard size on your O'Boy 25 are no larger than 3/8". I am sure if you buy a block that will take that size, assuming it is a reputable source like Harken, Schaefer, Garhauer, Wichard, Selden, yada, yada, then you can be assured it will be tough enough to handle the job. Just fasten your hardware with through bolts and not screws and use fender washers as a back up. I am trying to recall the headliner in an O'Day 25 and I can't right now. But if there is a fiberglass liner inside with air between it and the actual deck, then you want to drill larger holes through the liner big enough to get a socket head through to tighten your nuts on the underside of the deck. You can then cover the headliner holes with a nicely formed chunk of teak, plastic, plugs, etc. If this is the case and you just torque down the nuts against the headliner, it will crack and you will cry.

 

[Napa Ed]

Harken Bullet Blocks attached to an organizer plate from Dwyer Mast. The Oday25 uses a DM-500 profile mast extrusion

 

[Mac Daddy]

The harken site has a load calculating program. Type in the boat make and the piece of equipment your looking at and it will reccomend a block. From there you could work backwards by using the specs of the recomended block.