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Clevis pins and their fittings.

Printed From: Yachts and Yachting Online
Category: General
Forum Name: Repair & maintenance
Forum Discription: Questions & tips on the subject
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13666
Printed Date: 25 Jul 21 at 2:59pm
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com


Topic: Clevis pins and their fittings.
Posted By: Sam.Spoons
Subject: Clevis pins and their fittings.
Date Posted: 02 Sep 20 at 1:59pm
I have the usual two sizes of pins/fittings in the bits box (3/16" and 5mm) they are not really interchangeable (ok, 3/16" pins are 4.8mm dia. so usable in place of a 5mm if you're stuck). But I've just re-drilled a couple of old, imperial, HA vernier shroud adjusters so I can use 5mm pins, same as the rest of the boat, which has worked fine. But, I have a couple of 5mm quick pins that I thought I'd use on the lowers and they won't fit. So are 5mm pins exactly 5mm the holes drilled slightly larger 'clearance' size or are the holes 5mm and the pins slightly undersized? I'd have thought the former but my 5mm clevis pins fit fine through a 5mm hole it's just the fast pins that don't....

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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"



Replies:
Posted By: 423zero
Date Posted: 02 Sep 20 at 7:03pm
drill them out to 5.2mm, sometimes the hole causes the pin to oval slightly.

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Robert


Posted By: Rupert
Date Posted: 02 Sep 20 at 9:18pm
You own a 5.2mm drill bit?

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Firefly 2324, Lightning 130, Puffin 229, Minisail 3446 Mirror 70686


Posted By: Sam.Spoons
Date Posted: 02 Sep 20 at 9:35pm
That's more or less what I've done, by wiggling the 5mm drill around a bit LOL. The issue is probably down to tolerances rather than design.

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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"


Posted By: 423zero
Date Posted: 02 Sep 20 at 10:00pm
5.2mm, think it's a pop rivet size, 4.8mm too, not sure though.

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Robert


Posted By: 423zero
Date Posted: 03 Sep 20 at 6:05am
https://www.amazon.co.uk/Cobalt-Jobber-Drilling-Stainless-Metals/dp/B07DR9SMJS

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Robert


Posted By: Sam.Spoons
Date Posted: 03 Sep 20 at 7:58am
Originally posted by 423zero

5.2mm, think it's a pop rivet size, 4.8mm too, not sure though.

4.8mm is the metric conversion for 3/16", 5.2mm is the tapping size for an M6x1mm thread.


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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"


Posted By: 423zero
Date Posted: 03 Sep 20 at 8:01am
There are always reasons for certain sizes, nothing random.

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Robert


Posted By: Sam.Spoons
Date Posted: 03 Sep 20 at 8:03am
There are Thumbs Up I'm rediscovering my grammar school engineering background since I tidied out my workshop during lockdown Tongue

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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"


Posted By: 423zero
Date Posted: 03 Sep 20 at 9:00am
I built a barbecue kitchen and bar, plus fitted a cctv system to house and gardens with a DVR, oh and a hutch for the motorbike.

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Robert


Posted By: Sam.Spoons
Date Posted: 03 Sep 20 at 9:29am
I got a few other house jobs done and a bit of rewiring in my music room/studio (and a fair bit of playing too).

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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"


Posted By: davidyacht
Date Posted: 03 Sep 20 at 9:37am
Zeus Tables next to the computer 

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Happily living in the past


Posted By: Sam.Spoons
Date Posted: 17 Sep 20 at 11:12am
The final chapter in this sorry tale occurred on Saturday when I was rigging the boat with my newly acquired vernier adjusters on the lowers... Turns out they are slightly shorter than the metric, single row, ones so would not work Censored

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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"



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