Can the sheave of this stanchion block be replaced or is it time to buy new?

[Neil C]

Replace with a black sheave , more UV resistant than white .

[RaymondR]

I generally rebuild them. The one in the image is a temporary repair unril I get back to my support vehicle.

It is one of those swivel blocks with a spring similar to the one in the OPs image. The reason they fail is that the swivel stem which goes into the big washer the spring bears against is welded into it and they fail there. This is probably the fifth failure I've had with similar blocks over the years.

As can be seen in the accompanying image I've taken the becket out and used a piece of aluminium T to make a new anchoring pad to keep the block in service.

I will probably tidy this arrangement up rather than attempt to rebuild the original arrangement.

If you have access to a lathe you can cut the head of the bolt back to about half it's normal thickness, makes the bolt look like a bought one. Cit the bolt off so the end is flush with the nut and use a centre punch to punch just inside the circumference to prevent the nut from coming off.

[Enyar]

Originally Posted by pesarsten

https://www.westmarine.com/buy/schae...05?recordNum=1

NICE!

[jimbunyard]

Originally Posted by thinwater

Have you invested the time and energy to learn how to repair things, including basic mechanical, metal, and wood shop skills? Invested in the required tools? Obviously, replacement is more efficient. And that is why we throw things away.



You might find one in a second hand store.

'Tis also why 'one man's junk is another man's treasure'...

'Efficient' has several different meanings.

[thinwater]

Originally Posted by jimbunyard

... 'Efficient' has several different meanings.

Yes. That is what I was getting at. Some people are good at shop work, and some people are good at other things, and our world is based on specialization.

[thinwater]

Perhaps the most time- and cost-effective solution is Garhauer. A new block for $40. That would likely be my choice, even though I know how to replace a sheave. Garhauer makes good solid stuff for good prices. More than 1/2 of the blocks I've bought the past 10 years have been Garhauer. No problems.



https://www.garhauermarine.com/stanc...ock-sb-25.html

[donradcliffe]

I'm with Thinwater. The whole block is looking tired, and it is small enough that a replacement won't break the budget.

[sinnerman]

Originally Posted by Enyar

$118 for a replacement, hate to add more stuff to the landfill. Can this be repaired or is it time to replace it?

Why repair it??

This is the same company that made the original blocks on my 35 year old Catalina. The company is long out-of-business.

You can go buy a replacement Schaeffer (or better yet a higher quality Harken) to about 50-60 bucks.

How valuable is your time....?

If you REALLY feel the need to keep it due aesthetics, you can drill the pin out, get a replacement sheave at West Marine and install a stainless steel machine bolt in place of the original pin.


Cheers

[zstine]

Originally Posted by Enyar

$118 for a replacement, hate to add more stuff to the landfill. Can this be repaired or is it time to replace it?

Yes, I replaced mine with these $3 sheaves (check your size). Had to slightly drill out the ID for a bolt. Obviously you need to drill out the rivet, but it took like 15 min to save $100.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[zstine]

WOW so many people in the "throw out" society here. My grandfather is turning over in his grave...



look around and you can find sheaves for cheap. I replaced my Schaeffer reefing block sheaves with these...


https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


easy.

[s/v Jedi]

May be a good time to upgrade?

[Quebramar]

Originally Posted by s/v Jedi

May be a good time to upgrade?

That’s exactly what I had in mind reading through the thread. A friction ring costs a fraction of a shackle and will last forever.

[Quebramar]

Sorry I meant a block, not a shackle. English is only my 3rd language, apologies

[Sequoyah]

Replaced mine with fairleads from Nautos, on sale for c. $6 apiece (normally twice or so that).

[Mike Banks]

If they are mainly used for guiding a rope to a furler or genoa car, I replace them with a lanyard and frictionless rings, and keep refurbished or new blocks for more heavily loaded tasks. They are often worth refurbishing if not corroded. I have had these things snap--and I refurbish them by replacing with a Delrin sheave, a sealed stainless bearing or a bush and a bolt and self-locking nuts as mentioned by others.

But if the load is light, a friction-less ring is a good, maybe even a better option and keep the refurbished block for a dinghy hoist or deck hoist for lifting water containers, small outboard engines etc aboard.