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Author Topic: broken crankshaft  (Read 1105 times)

ramis

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broken crankshaft
« on: September 21, 2008, 04:26:22 PM »
No, not a car crankshaft.

This is a crankshaft from a 8,000 metric ton forge press.






The crank broke in the middle, through the throw which has a diameter of 53 inches!

Here's a picture of the press after it was put back together. 



This last picture is especially for El Tejon. grin
This is Clarence. He's been known to chew tobacco and eat at the same time. I don't think he bathes to often because he usually smells. I bet he doesn't even cut his lawn!  cheesy







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Nick1911

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Re: broken crankshaft
« Reply #1 on: September 21, 2008, 04:29:09 PM »
Wow, what a beast.  What do you have it stamping/punching/bending/pressing?

Bet that made some noise when it broke!
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drewtam

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Re: broken crankshaft
« Reply #2 on: September 21, 2008, 04:48:34 PM »
Ya got any better pics of the fracture surface, or has it gone to the mat lab already?
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ramis

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Re: broken crankshaft
« Reply #3 on: September 21, 2008, 05:29:51 PM »
Quote
Wow, what a beast.  What do you have it stamping/punching/bending/pressing?

We forge crankshafts, ring gears, steering knuckles, and some other small car and truck parts. Oh, and some airplane crankshafts too.

Quote
Bet that made some noise when it broke!

Actually there wasn't one loud noise when it broke. We had problems with bearings over heating but that's not uncommon during the summer when this happened. Then it got to the point where we couldn't get 5 parts through the press without having a bearing overtemp at which point they knew we had a serious problem.


Quote
Ya got any better pics of the fracture surface, or has it gone to the  already?

Sorry, I don't have any better pics. As far as I know the crank is still sitting in the same spot though.

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mat lab

We have a forklift that met lab uses. It says MET LAB across the back of it and some one took a marker and added a H to the end of MET.  cheesy

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The limerick, peculiar to English,
Is a verse form that's hard to extinguish,
Once congress, in session,
Decreed it's suppression,
But people got around it by writing the last line without any rhyme or meter.

Declaration Day

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Re: broken crankshaft
« Reply #4 on: September 22, 2008, 01:33:52 AM »
That's going to need a LOT of JB Weld!  shocked
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280plus

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Re: broken crankshaft
« Reply #5 on: September 22, 2008, 02:08:49 AM »
Naw, crazy glue and duct tape will work just fine. I used to do A/C work at an old stamp press factory. They had a ton (or two) of those sitting idle in a corner. They had upgraded to newer machines but kept the old ones. I was always amazed by them. The place made small two burner stamped metal gas stoves that were made here in CT and sold in Israel.
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mfree

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Re: broken crankshaft
« Reply #6 on: September 22, 2008, 03:51:10 AM »
Almost looks like the remnants of a casting void there on the lower right quadrant.
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