Hi,
The deck organizer sheaves in my circa 1987 Spacesailer 27 have succumbed to the ravages of UV.
I've removed the fitting and naturally there is no brand on it. Possibly the sheaves are not original.
I've looked online at Ronstan et al but cannot find a match for the sheaves as yet.
The size is ID 11mm, OD 48mm and width 19mm, with the exception of the ID I thing the other sizes are flexible to some extent.
maybe someone knows what brand they are that I can follow up. Ronstan do have 11mm ID but with 60 OD, they may have to do!
I could fit new organizers but was trying to avoid drilling more holes if I can as I dare say new ones won't match the existing mounting holes.

Thanks

These are old Ronstan ones and it looks like they no longer make. The biggest issue is any replacement they now do is not wide (width of sheave standing up) enough and the rope can run off the sheave.

What is the hole spacings between sheaves? Might be worth looking at new ones?

Alternately contact Allyacht spars and they can make you new sheaves, probably about $20 each!!!

Have a look at Spinlock and see what they have in their range.

www.allyachtspars.com.au/wp-content/uploads/2013/12/B1-Sheaves.pdf

dmarco said..
Hi Guys,

Thanks for the input and you have confirmed my suspicions and its about what I expected.
I'll look at new ones and see how I go and I may try a the one Ronstan sheave that will fit but is much bigger in diameter.
If all else fails I'll either have to fit and drill more holes or have some sheaves made.

Ahh the joys of older boats!

Thanks again and really great to have the AllYachtSpars info.

Just buy Delrin and find some pensioner with a lathe. I have a lathe but I have made sheaves previously using an electric drill in a vice. Delrin is particularly pleasant to work on a lathe. There is bound to be some old bloke in your area busting for a project for his lathe.
http://www.ebay.com.au/itm/20mm-Dia-White-Acetal-Rod-Delrin-Engineering-Plastic-Bearing-Gear-Bushing-/252413990246?hash=item3ac50bd566:g:DOIAAOSwMmBV7BNu

Whitworths sell the wheels. Theyre cheap. Theyd work??

I bought the black ronstan ones. They look smart and work well. $58 for double sheave. Come to think of it it could be hard to get the wheels to work as youd need some kinda clevis pin that suits

Sectorsteve said..
I bought the black ronstan ones. They look smart and work well. $58 for double sheave. Come to think of it it could be hard to get the wheels to work as youd need some kinda clevis pin that suits

Good to hear they are working for you. My original ones were mounted at a slight angle using a wedge shaped piece of teak underneath to improve the entry angle for the ropes coming off the mast blocks. That's ok but unless there is a matching wedge under the nuts it tends to bend the bolts. I guess most people don't worry about it but I think I'll use a flat bar spacer which will achieve the same thing, provided it doesn't have to be too high. Need to have a good look at the line angles, nothing is ever easy! The Ronstan wheels would work with what I've got except they are a bit narrow and smaller line can and does get stuck down the side of sheaves as happens on the Beneteau F35 I crew on. FYI I had a look today and it uses two stacks of 3 Spinlocks on a raised section of cabin roof to better match the line entry angle.

Thanks for your interest.

The Ronstan sheaves are available, it's just hard to find someone that will sell them in Australia. They can be bought from NZ and some sites in the USA.

www.ronstan.com/marine/range.asp?RnID=032