Tapered SS Washers or Wedges

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Johny
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Tapered SS Washers or Wedges

Post by Johny » Oct 23rd, '18, 11:45

Hi all.
I am looking for either some tapered 1/4" Stainless Steel washers with about a 12 to 15 degree taper - or wedges.
Reason: The chainplate straps on the Jarcat come through the deck at about a 12 degree angle to the outside of the hull(s), so the nut side of the bolt is actually attempting to bend the bolt. (The straps have wooden wedges between the straps and the hull - the wedges are epoxied to the inside of the hulls - but that still leave the bolts at and angle NOT 90 degrees to the chainplate straps.)
Wedges or tapered washers would solve the problem.
My current thinking (after much searching) is to take an angle grinder to some 1/4 nuts and drill out the threads so they act as washers. That would let me match the angle as well. This is a critical area so taking up the gap with epoxied spacers won't cut it ( I think).
Jarcat 6, Kismet. 6.2M Catamaran. 9.8HP 2 Stroke Tohatsu.
https://jarcat6.blogspot.com.au/

rseydler
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Re: Tapered SS Washers or Wedges

Post by rseydler » Oct 23rd, '18, 13:30

I'd go epoxy filler mix, back off the nut somewhat, coat anything you don't want stuck in wax or cling wrap first, and fill the void with a stiff mix. Wait 3 days, instant washers :)

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Johny
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Re: Tapered SS Washers or Wedges

Post by Johny » Oct 23rd, '18, 16:34

Fair enough. Then I think I'll make wide spacers from epoxy outside the boat otherwise I'll be working overhead in a cramped space. That way I can maximise the area of the spacer and use a big washer on the nut side. Thanks - I was a bit in doubt whether epoxy was the way to go. I guess it's stronger than the ply hull!
Jarcat 6, Kismet. 6.2M Catamaran. 9.8HP 2 Stroke Tohatsu.
https://jarcat6.blogspot.com.au/

geoff
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Re: Tapered SS Washers or Wedges

Post by geoff » Oct 23rd, '18, 16:56

You can buy galvanised tapered washers

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zebedee
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Re: Tapered SS Washers or Wedges

Post by zebedee » Oct 23rd, '18, 17:46

I had a potter around in google and you can also get tapered/wedge/bevel washers in stainless.

Image

Have you been to your local fastener specialist for a chat? Take some photos of the problem to show them too, they may have a different clever solution, for example spherical self aligning washers.

Image
A man's boat is his Castle. The Gippsland Lakes are my moat. Castle 650 #10, Roller Coaster.

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Johny
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Re: Tapered SS Washers or Wedges

Post by Johny » Oct 23rd, '18, 22:50

Hi Zeb. The spherical washers don't seem to have much angle. I have seen the wedges but not found them in M6 or 1/4". I don't have a good SS fastener supplier near me in Eastern suburbs (that I've found). I tend to buy online mostly from Qld .
Jarcat 6, Kismet. 6.2M Catamaran. 9.8HP 2 Stroke Tohatsu.
https://jarcat6.blogspot.com.au/

rseydler
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Re: Tapered SS Washers or Wedges

Post by rseydler » Oct 24th, '18, 10:28

You could ask Marg how her thermo set plastic from jaycar went? That is also an option.

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MargGannet
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Re: Tapered SS Washers or Wedges

Post by MargGannet » Oct 24th, '18, 17:47

Trying to remember what I used it for?????
Marg
Special Edition NX 25,
LC 80 series
Bayswater North, Vic

rseydler
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Re: Tapered SS Washers or Wedges

Post by rseydler » Oct 24th, '18, 18:24

Cam bases?

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MargGannet
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Re: Tapered SS Washers or Wedges

Post by MargGannet » Oct 24th, '18, 19:45

Don't think that was me... not recently anyway!
Marg
Special Edition NX 25,
LC 80 series
Bayswater North, Vic

rseydler
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Re: Tapered SS Washers or Wedges

Post by rseydler » Oct 24th, '18, 22:18

Ok maybe Sue? Sorry Marg!

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Grith
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Re: Tapered SS Washers or Wedges

Post by Grith » Nov 6th, '18, 07:18

Hi Johny Nice to see someone with a Jarcat here on the site having owned and extensively sailed and cruised a few myself. My ex partner and I spent nearly 5 weeks in the Whitsundays living out in the islands in One and Only a Jarcat 6 in 2000. We had a great time and were accepted into a group of long term cruisers ( they took pity on us In our funny tiny yacht I think 🙂). The now tragically deceased designer Ross Turner helped me buy the boat sight unseen in Brisbane from Perth and then we embarked on an epic 3 month holiday including driving over, collecting, modifying for a week then sailing initially in Morton Bay then the Whitsundays followed. We drove back via Townsville, Mount Isa and the rock camping in the boat right out in the desert. Many stories still abound with friends, locals and other sailers eminating from that trip where quite a few crazy things happened. Best wishes with your sailing and travels. I did quite a few neat mods and have seen a lot of Jarcats in my time should you want to discuss some thoughts or ideas you have. Kind Regards Graeme
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Jarcat 6 at The Rock a long way from water
Grith
South Coast NSW
Imexus 28 2009
Diesel Inboard Cruising Power Sailer
Hobie Adventure Islands (sailing trimaran kayaks)
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Johny
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Re: Tapered SS Washers or Wedges

Post by Johny » Nov 6th, '18, 12:22

Hi Grith. Thanks for the response - it's so good to hear of past Jarcatters. I've been following your posts re the Imexus 28. I'm about to arrange closer storage where I can get 7 day access to Kismet. At the moment there is a 2 to 5 day delay in getting it in or out of storage which is slowing me down somewhat. The front grass has 3 possible positions and I've partially killed the lawn in all 3 - wife not happy.

I've taken some pictures to update the blog but the latest is that the wooden wedges that were supposed to be epoxied to the inside of the hull simply fell out when I removed the single 3/16" bolt (and self tapper) that was holding the chainplate strap.
I was always suspicious given the other shortcuts the guy when "finished" the build did.
I have some support here in Melbourne from Don who now sells the plans but like many boats most of my issues are pretty unique so I kind of wing it for each problem.

The main thing I'm trying to achieve in the next 3 weeks is getting the standing rigging sorted out - mainly chain plates.
Jarcat 6, Kismet. 6.2M Catamaran. 9.8HP 2 Stroke Tohatsu.
https://jarcat6.blogspot.com.au/

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