On 2015-06-23, Gunner Asch wrote:
On Tue, 23 Jun 2015 16:39:06 -0500, Ignoramus9052
wrote:

On 2015-06-23, Gunner Asch wrote:
On Tue, 23 Jun 2015 08:47:22 -0500, Ignoramus9052
wrote:

On 2015-06-23, Gunner Asch wrote:
On Mon, 22 Jun 2015 23:02:16 -0500, Ignoramus8881
wrote:

http://igor.chudov.com/tmp/crankshaft.jpg


They abused the **** out of that crank. See the scoring on the driven
side?

No lube there in a long time.

Great observation!

This was from a punch press.

This is how most Chicago people use most equipment, in general.

i

Folks here seem to forget I work on and repair this sort of thing.
Machinery in machine shops Shrug. Its how Ive made my living for 20
yrs.

The folks that owned that press had zero maintainece. Even if they
were paying somebody. Having a crank that badly scored is clear
indication that sooner or later..somebody is gonna **** up badly
enough to bust that same crank.

What happened..die platten bolts break and the platten shift? That
wasnt a "crystalization" break of the crank..but a full power ****up.
Anyone get hurt when it all broke loose?

I have no idea, I simply observed that crankshaft on the ground, I do
not know the story. My guess is not much happened to the operator.

i

The older machines often had a BIG assed flywheel on that end of the
crank along with the brake. I was called in years ago on a repair job
for a crank that had crystallized and that 8' flywheel had suddenly
gotten free. No one was badly hurt..but the flywheel was found in the
street blocking traffic....embedded in the side of someone's
van...about 400 feet from the press. It damaged everything so badly
on the press..and the shop wall..and the front office wall..and the
wall outside of the building, and a motorcycle in the parking
lot......that they simply scrapped the press, moved in a new(er)
press, called in the carpenters, tow trucks and the insurance company
(s)......

http://midwestmachy.com/wp-content/u...6/DSC_0012.jpg
Is an example of the type of press that failed....


I layed such a press with 15k forklifts...

rams instead of a flywheel. While more complicated...when they fail
catastrophically...they usually stay together....


Thank you for sharing this fun and educational story.

i