Motorcycle Chain On My Mast

[Departing2017]

Any thoughts on this rigging, what it's called, or where I can find replacement chain? The chain (looks like stainless motorcycle drive chain) wraps around a sprocket at the bottom of the whisker/spinnaker pole T-track. The sprocket can be turned with a winch handle to adjust the height of the pole attachment pins. It seems like a pretty handy setup. I'd like to get it working, but several links of the chain are broken. Thanks for the help.

[Stumble]

I have never seen anything like that on a boat other than in a steering binnacle. I would think a bike shop or motorcycle repair shop could at least tell you the critical dimensions to take to mcMaster Carr, or whoever makes bike chains. But I am guessing

[CarstenWL]

... Let me google that for you

Carsten

[Departing2017]

Steering system chain. Probably the same stuff. Thanks, Stumble. That's a helpful comment. Now I have something to Google . . .


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[sanibel sailor]

stainless roller chain, also used for pedestal steering about 1/4 the price from Edson.

McMaster-Carr

[jdazey]

Size 40 stainless chain. Pretty common stuff used on bikes, conveyors, drive systems, whatever. Motorcycle chain can have o-ring seals so you wouldn't have to keep it lubricated, but it probably won't be stainless.

Joe

[roverhi]

The set up is probably from Forespar. It looks like their toggles on the track. If nothing else, they can probably supply the chain though it would undoubtedly be cheaper from a non marine source.

If you can find a source, you could probably repair the chain with master links replacing the missing/broken links. That would probably save a bunch.

[rdowall]

I googled the stampings from photo of your the chain and found:

TSUBAKI Roller Chain,Riveted,40SS ANSI,10 ft ... - Grainger

W. W. Grainger
Shop TSUBAKI Roller Chain,Riveted,40SS ANSI,10 ft. (6L076) at Grainger. ... Country of Origin JapanCountry of Origin is subject to change. Note: Product ...[/I][/I]

[captmikem]

I had that same setup on a Hallberg Rassy 42. Worked great. It so happens it is the same chain the autopilot used. Florida Rigging was able to get parts for it for me.
rigginghydraulics.com

Michael

[Stumble]

So it appears that 40SS is a size, and refers to ANSI Size 40 chain. I had no idea there was a numbering convention for this. Good to know.

[jdazey]

The SS part is for stainless.

Joe

[SWTFRDOM]

Originally Posted by Departing2017

Any thoughts on this rigging, what it's called, or where I can find replacement chain? The chain (looks like stainless motorcycle drive chain) wraps around a sprocket at the bottom of the whisker/spinnaker pole T-track. The sprocket can be turned with a winch handle to adjust the height of the pole attachment pins. It seems like a pretty handy setup. I'd like to get it working, but several links of the chain are broken. Thanks for the help.Attachment 101448

Attachment 101449

Attachment 101450

Go look up a belt and transmssion shop and they should have the links you would need to repiar the chain. The links are replaceable. Just bring a sample with you so you can match it up perfectly.

Howard
Sweet Freedom