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John How
02-27-2012, 03:08 PM
While waiting for a set of plans, I thought I would make some riggin parts. I bought the sheaves and made some maple enclosures. I will either replace the mild steel with something else or have them galvanized. Drilling stainless can be a problem and I can't seem to find any 1/8 x 1/2 flat bronze, guess I could use brass.

http://www.johnhowguitars.com/images/SjoginIII/SIII-1.jpg

http://www.johnhowguitars.com/images/SjoginIII/SIII-2.jpg

Peerie Maa
02-27-2012, 03:16 PM
Excellent beginning. Galvo will be fine for those. The shell can be shorter to save on wood. The bottom spacer can be made to fit just clear of the sheave, with a hollow curved top, and the upper spacer can have a hollow groove across the width of the block to provide clearance for the line. All in all that will allow the shell to be shorter, saving on your timber supplies if you make more. The strap does not need to extend much past the sheave, unless you are going to put a second beckett on the block, again making a saving in materiel's.

TerryLL
02-27-2012, 03:25 PM
Atlas Metals has 1/8 X 1 bronze flat bar.

http://www.atlasmetal.com/silicon-bronze-flat-bar.php

Alaskan Copper & Brass has 1/8 X 3/4 brass flat bar

http://www.atlasmetal.com/silicon-bronze-flat-bar.php

Thad Van Gilder
02-27-2012, 10:17 PM
I have had that problem, but I took a piece of plate to a shop around the corner with a big wide shear, and they sheared me off two 1/2" strips of the plate.

-Thad

James McMullen
02-27-2012, 10:24 PM
Looking pretty good for practice, but you should know that maple is awfully rot prone, and almost never used on boats because of this. Think of all the spalted maple you've seen--that's actually wood that is rotting in an attractive pattern. It's all the sugars in the maple probably--fungus loves maple sap for breakfast just as much as I do.

Do the next set using proper marine grade materials such as bronze or stainless and white oak or locust or elm or something and you're there!

Thad Van Gilder
02-27-2012, 10:36 PM
Oh good call, James, that slipped my attention!