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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.
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.
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.
Next, turn it back over and drill your hole.
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.
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.
Re: Cotter Pin Drilling Jig.
Posted: Fri Oct 09, 2020 5:16 pm
by Steve Jelf
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