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Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 3:45 pm
by Pep C Strebeck
I wasn't even looking for this or anything like it when I found it, but I wasn't going to let it slip by once I saw it.

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It had been listed for a while and had a good number of watchers, I made and offer and I am happy to have it. To be honest the thing looks N.O.S. like it was never used.
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It is a very well made and nicely finished piece. Everything is ground and chamfered, it even tells you what number drill to use, and the whole thing is Case Hardened. Even if I did have to pay 10x the original price on the box I still think I got a great deal. I will post a couple of photos of it "set-up" for use right after this post (5 photo limit).

Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 3:48 pm
by Pep C Strebeck
I am showing it with a tie rod bolt installed (the only thing that I had handy when I took the pictures). With the jig on its side, you install the bolt until it sets flush to the bottom and then tighten the set screw.
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Next, turn it back over and drill your hole.
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You can see in the following photos that the hole in the tie rid bolt lines up with the guide hole in the jig. I checked this against some other random Model T and A bolts and all the holes lined up perfectly.
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Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 4:05 pm
by Pep C Strebeck
Here is a copy of the brochure/instructions that came with it.
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Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 5:16 pm
by Steve Jelf
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My home made one only takes a couple of sizes, but it works OK on them. I was lucky to have a thick enough bit of scrap.

Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 6:11 pm
by big2bird
Nice find.

Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 6:21 pm
by VowellArt
Nice find, but wouldn't that screw mess up the threads on that bolt your drilling for the cotter pin? I mean to secure it you'd have to clamp it down quite a bit wouldn't you?

Me I don't like cotter pins, I prefer vibration proof nuts...not period, but they work far better than cotter pins do...and you don't have to straighten anything (like that blasted pin) to reuse it either.

Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 9:53 pm
by Original Smith
Langs sells them. I've used mine a number of times. I'd rather have that original though!

Re: Cotter Pin Drilling Jig.

Posted: Fri Oct 09, 2020 10:08 pm
by dhosh
What is it made of? Looks like alunimum.

Re: Cotter Pin Drilling Jig.

Posted: Sat Oct 10, 2020 6:02 am
by Dan B
Really really neat. I would put it to good use! You did good!

Re: Cotter Pin Drilling Jig.

Posted: Sat Oct 10, 2020 10:13 am
by Corvette Guy
I wish I knew about these before I broke a couple of center drills and regular drills. You can also use the flat of a nut backed against another nut to drill the hole.

Re: Cotter Pin Drilling Jig.

Posted: Sat Oct 10, 2020 11:42 am
by sweet23
Great find for anyone with an antique car. "You will love it better'n your money"

Re: Cotter Pin Drilling Jig.

Posted: Sat Oct 10, 2020 12:29 pm
by Dropacent
It’s hardened steel ,Dave. Great find! Wish it was mine

Re: Cotter Pin Drilling Jig.

Posted: Sat Oct 10, 2020 2:47 pm
by ivaldes1
They have cheap metric ones on amazon. I found this SAE one on amazon is it any good? https://www.amazon.com/Allstar-ALL10122 ... ive&sr=1-1

Re: Cotter Pin Drilling Jig.

Posted: Sat Oct 10, 2020 3:38 pm
by John Page
Pictured is one I made. John Page, Australia
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