New methods to try in your shop

[Dave Koehler]

Bigger parts require bigger hammers.
Checked his other videos. Seems fairly well equipped for what he is working on.
Perhaps a wet mag is in his future. The pixie dust and bang technique is interesting though.

[gruntguru]

Fascinating. Couldn't take my eyes off it. Loved the subtitles, ("begin" = big-end).

[Dave Koehler]

You may want to try straightening a little crank before giving him grief about that big one.
There is the hydraulic way which works up to a point and then there is the radiused chisel in the radius way which is an art mastered by a few.
He has a hydraulic crank press by the way against the back wall.
He talks a lot. I wish I spoke the language to see what he had to say about it.
I understood crankshaft and radius.

[gunt]

And there i was buying equipment , should have went to the hardware store

if ever i seen a man in need of drugs

[Schurkey]

Why do I hear some dude with a goofy English accent saying "Tooobular Bells!" just before he hammers that poor crank?

[Dave Koehler]

https://www.youtube.com/watch?v=L3ahFi7ybuk
So what is the dust he is using?

That one you can turn on subtitles to grasp what he says he is doing.


On this video he shows the results on a cracked crank. no subtitles
I do think however, on this crank the crack may be obvious enough that I don't think pixie dust was required. Could be wrong.
https://www.youtube.com/watch?v=QJUIzaZ9VMg

While it may not be the ultimate test the method has some merit.
I wonder if our forefathers may have used this method in the earliest days up until someone realized a magnet would help.
Remember that machines with rotating parts and cars themselves evolved quicker than the electrical grid.
Parts of this country had no electricity up to and just after after WW2.

[gunt]

he should be called THOR

he does love his hammer

[Dave Koehler]

When the blacksmith was asked what it took to gain his skill with the hammer he responded
"Son, you just have to be smarter than the hammer"

[modok]

I just skimmed through the vids, maybe will watch later.
But, all looks legit, aside from cosmetic issues.
You know, using a brass or aluminum face hammer helps to appease the uneducated masses.

[Dave Koehler]

yes, a softer headed hammer might have worked also.
I can't say that he was actually beating the hell out of it for his vibration procedure. We call that the ole ring test here.

[swampbuggy]

Exhaustgases, i laughed till i cried when i read about your thoughts on the Carrillo contract !! Mark H.

[MotionMachine]

I don't believe any soft face or similar hammer will get any movement out of a crank. I had a customer with a bent race crank (.012" IIRC) who was afraid of my straightening technique. So he fashioned a large brass chisel to match the radius on the crank and spent about 20 minutes on my crank press (but no pressing) with zero gain. He finally gave up so I gave it one hit each on the 3 center mains with my steel chisel and it got it back by half.

[MadBill]

If I recall correctly, the idea is to strike the journal fillet on the low side of the bend, thus inducing some compressive load in the material which will cause the crank to spring back. A brass drift won't dent/compress hard steel.

[gunt]

Never mind the fact that this is a new method to try in our shops , I think i'm just gona bite the bullet and hire this guy

[modok]

I don't believe any soft face or similar hammer will get any movement out of a crank.

I meant for stress relieving the con-rod, when he had it on the floor beating it with a 3 lb engineers hammer. Right idea, wrong tools.
I-beam rods can have a property where they easily bend slightly one way or another, almost don't want to stay exactly straight, and I think that's what he was going after with that technique, to make any real correction on that size connecting rod you you need a press, which was shown next.

but for cranks I have one guy swear a snap-on dead blow was better than a solid hammer for that. Not sure,

I swear the only reason you guys are using "brass" is because your so old school that it was before aluminum was invented. brass work hardens and cracks worse than aluminum IMO
Brass drift?.... maybe it's just bling.