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Old 24-04-2016, 08:03   #1
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Help identifying spreader base

I got my first sailing boat few months ago and now that the spring is here and ice is melting I'm tring to get her ready to launch... It's Maxi 77 and upon closer inspection of the mast I noticed the spreader base is completely fractured.

I've been trying to google for the suitable part last few hours but no dice. Does anyone got any ideas where to find suitable replacement part? (tried rig-rite already).

The other only option seems to be to make it myself. Something like this: Ny mast – Sailing Maxi 77
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Old 24-04-2016, 08:51   #2
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Re: Help identifying spreader base

Have you been unable to identify the mast manufacturer, or contact the boat manufacturer for help?

I have seen similar sockets on Isomat spars, though yours appear a bit different than Isomat's.

Wish I had more. Good luck!
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Old 24-04-2016, 09:03   #3
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Re: Help identifying spreader base

As far as I know the original Maxi manufacturer is no more. The boat was manufactured around 1978 so it's a bit old.

The only mention I was able to find about the mast manufacturer was on rig rites webpages which talks about Isomat NG28 mast and from there I got to BF3 spreaders (Isomat BF3 Spreader)

However the only bolt on spreader base there seems to be different than what I have because mine has the attachment bolt at the end of the spreader "socket" and it seems to be quite different from the BF3-37p.
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Old 25-04-2016, 10:49   #4
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Re: Help identifying spreader base

I took it apart and found interesting things.. Maybe this photo helps someone remind something similar?

It seems that the speader bases are attached to the mast via 3 rivets and then there's long half threaded bar running through the mast and bolts in both ends to compress the spreader bases against the mast and each other... It seems the rigging was incorrectly installed as the spreader bases have taken significant load instead of being just compressed. That is if my understanding is correct that the spreader bases should only get compressing loads and nothing else. (from thread Sagging spreader, is that a symptom of something sinister )

I really hope the (big) bend in the metal bar is caused by stress and not designed.. Otherwise that's PITA to replace.

When building replacement parts, any ideas on how to calculate the angle that the spreaders should be in?
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