| Author | Message | ||
     Brad Stone New member Username: Bstone Post Number: 6 Registered: 06-2004 Rating: N/A |
Figure I'd add an update to this sheave discussion. Forgive me if you all already know this: I'm switching from wire to all-rope halyards and called Offshore for sheaves. They have the original sheaves for wire, but also Delrin sheaves for up to 3/8" rope. The dimensions are 2 1/2" x 1/2" x 1/2" pin, a perfect replacement fit in my mast (hull #60). $12 each. | ||
| Mike Bergmann Unregistered guest Rating: N/A |
I looked thru all Harken, Ronstan, Schaefer, etc. literature, and nobody makes a new sheave to fit our box. The sheave dimensions we need are: Diameter 2" Width 1/2" Pin diameter 1/2" Offshore will sell you a direct replacement for $21.00, and you won't find a replacement anywhere else at any price. | ||
| Greg Grassle (Gregg) Rating: N/A |
Alan, I replaced two of them in my mast a year ago. Having done so, I'd strongly suggest you get your replacement sheaves from Offshore. They really weren't that expensive. You have 3 critical dimensions to deal with. The sheave diameter(approx. 2"), the sheave width, and the bushing diameter for the pin. The pin, halyard guard, and sheaves all fit together with no room to spare. If the sheave is just slightly too big or too wide, it'll jam against the halyard guard. Jeff is right on with everything he says. My front halyard guard screw was also seized. I had to drill out and retap this just like he did. Greg Grassle Hull #113 "Pinch Me" | ||
| Jeff Roy (Jeffr) Rating: N/A |
I didn't replace them but I just pulled all 4 sheaves out of the top of my mast. They are solid sheaves with plain bearings. I think they are about 2" in diameter, but I didn't measure them. I suspect that you can get by with just removing them, driving the bushing out, cleaning them up and putting a little grease on them and putting them back. I agree that a ball bearing sheave would be better, but it can run into sustantial costs. Unless the sheave is heavily scored I think they will be re-useable. keep in mind that removing the sheaves involves getting several SS screws out of the aluminum mast. This is the real chore. Use PB Blaster (get it at a automotive store) and lots of heat. If this doesn't work you can try using them with an impact driver. The last resort is to drill out the screw and then retap the mast. I only had to do that to the screw on the front of the halyard guard. | ||
| Alan Szmania Rating: N/A |
I believe my genoa halyard sheave has frozen up and before I take the mast down, I would like to have the new sheave in hand. I'll probably replace all three sheaves while I'm at it. Does anyone know the size of the sheaves used in the Offshore Spar? I'll probably replace them with a Harken product if availabe. |
