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Winchelsea South, VIC, 3241
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Forums > Windsurfing General

wanted - old mistral part-got one in your garage?

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Created by stangreen > 9 months ago, 21 Aug 2010
stangreen
12 posts
21 Aug 2010 5:55AM
Thumbs Up

Anyone got one of these collecting dust in their garage?
Sentimental oldtimer trying to to keep his old Mistral Maui going....



Stan

SurfConnect
QLD, 1674 posts
21 Aug 2010 8:12AM
Thumbs Up

Have you tried just changing the rubber joint? We have them in stock if you have trouble finding supplies locally. Else I have 2 boxes of old parts, but you are better off changing to a new one. We also have the new non-rubber mechanical joints you might want to consider too.

stangreen
12 posts
21 Aug 2010 6:30AM
Thumbs Up

Thanks for the suggestion SurfConnect
I've seen what you're describing but they just have a threaded hole each end.
this joint has a particular notched pin fixed in each end - They are fixed in permanently -
or rather- i cant get them out. If I cant find an old spare I will have to turn the pin
myself on a threaded bolt - I was just hoping to find one.....

WindmanV
VIC, 752 posts
21 Aug 2010 9:05AM
Thumbs Up

Hello, Stan,

I’ve seen these joints earlier in my career, but can’t remember their exact construction. However, I think that boards of that vintage would have used rubber directly moulded to the steel.

As a suggestion, get a hacksaw and hold the bad end of the rubber in a vice, whilst carefully hacking through the good end of the rubber until you get to the steel core. Remove as much rubber as necessary. You should be able to see if the rubber is moulded around the steel or whether the rubber is moulded around a steel female nut, into which a steel male is threaded.

If the rubber is moulded direct to the steel, you will not be able to recondition the UJ, only replace it (as you suspect).

If the rubber is moulded to a female nut, you might be able to unscrew the male from the female, using something like WD 40 and it will probably take considerable time and effort to break the parts free. As SurfConnect says, the latest style uses rubber moulded around a female nut, into which a male shaft is Loctited and screwed.

Hope this helps.

kato
VIC, 3449 posts
21 Aug 2010 10:24AM
Thumbs Up

Stan,go to an engineering shop or School and get a new one made up to fit a new rubber joint. Cost about $20 Aus

stangreen
12 posts
22 Aug 2010 3:40AM
Thumbs Up

Thanks guys, I guess I will just have to stop being lazy and make something.
Cheers,
Stan.

Chris 249
NSW, 3425 posts
22 Aug 2010 7:14PM
Thumbs Up

Check the mast track - some of the Mistral units had two holes. One hole takes the special Mistral pin, but the other one is a simple threaded hole that will take the screw in the bottom of a standard uni. It's not exactly as easy as using the Mistral unit, but not much harder.

The Maui's a fun board. From memory it was never designed to go really fast, just to be nice to sail. It's not just for nostalgia.

AUS4
NSW, 1274 posts
22 Aug 2010 10:00PM
Thumbs Up

These pins will unscrew. They are held in with Loctite, you will have to heat the pins a little with a blow torch to brake the Loctite seal. Use vice and multi grips. Boge rubber joint.

Chris, this era of Mistral mast track 1983 - 1987 has no option for a separate tread.

stangreen
12 posts
22 Aug 2010 10:33PM
Thumbs Up

AUS4 - I will give heating it a go.
It would great if i could get the pins out
and just screw them into a new UJ!
Thanks again for the additional suggestions guys.
Stan

stangreen
12 posts
28 Aug 2010 6:26AM
Thumbs Up

All sorted! I got a new threaded rubber UJ and turned a couple of
stainless steel bolts to match the pins in the original part and super-glued them in.



Also I made a threaded aluminium nut that fits into the old ali mast track so if
I want I can put a brand new mast foot on the old board.



Thanks for all your suggestions - they got me out of thinking I had to find an original part. Now I can carry on using the board either with the old rig or a new one.
Spoilt for choice!
Stan.

WindmanV
VIC, 752 posts
29 Aug 2010 9:44AM
Thumbs Up

Hello, Stan,

Glad that you got out of the problem, but as a suggestion, don't use the aluminium nut, because it will not take much load before the thread strips. Suggest you make another one out of steel.

You might consider that no board manufacturer uses aluminium for the nut, only steel, so ther must be a reason for it.

Hope this helps.

windsufering
VIC, 1124 posts
29 Aug 2010 10:28PM
Thumbs Up

try the rsx uni joint i think its the same i use it on my mistral one design and it works



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"wanted - old mistral part-got one in your garage?" started by stangreen