Is this a locomotive crankshaft?

That looks like a crankshaft for an inline 6, not  V6.

Pete

@Norton posted:

That looks like a crankshaft for an inline 6, not  V6.

Pete

More like a V12, i.e. maybe an EMD 12-567? An EMD V8, or an EMD V6 would be a LOT shorter, with only 4 or 3 throws for connecting rods.

Would make a nice outdoor lamp post.  

@Hot Water posted:

More like a V12, i.e. maybe an EMD 12-567? An EMD V8, or an EMD V6 would be a LOT shorter, with only 4 or 3 throws for connecting rods.

The only way it could be a V12 is if used shared crankpins. I count 6 crankpins and 7 main bearings.

Pete

Where's the official photographer's Coca Cola can for size relativity?

V12s would use two connecting rods on each crankshaft eccentric, and the eccentrics would be wider to mount two connecting rods. The lubrication holes on these eccentrics look like they're designed to supply only one connecting rod. The nose of the crankshaft has a large gear to drive a camshaft or other auxiliary/accessory. An automobile engine would be more likely to have a sprocket for a chain-driven camshaft. Bottom line - I'm not sure what it is.

MELGAR

@Norton posted:

The only way it could be a V12 is if used shared crankpins. I count 6 crankpins and 7 main bearings.

Pete

Well, apparently you are not familiar with the EMC/EMD General Motors  Fork & Blade" connecting rod design from the mid 1930s 567 series engines, through the 645 series engines, and today's high HP 710 engine series. That design is definitely worth looking up.

@MELGAR posted:

V12s would use two connecting rods on each crankshaft eccentric.

Correct

The lubrication holes on these eccentrics look like they're designed to supply only one connecting rod.

Correct again, which tends to indicate that it is an EMD 12 cylinder crankshaft. You also might research the EMC/EMD General Motors "Fork & Blade" connecting rod design on their two stroke cycle Diesel engines.

The nose of the crankshaft has a large gear to drive a camshaft or other auxiliary/accessory.

On EMD engines, the front of the crankshaft is equipped with a large diameter "torsional damper" and a spur gear to drive the accessory fron gear train, which has the water pumps, oil pumps, and governor drive. The camshafts and roots blowers (or turbocharger) are driven by the rear gear train.

An automobile engine would be more likely to have a sprocket for a chain-driven camshaft. Bottom line - I'm not sure what it is.

MELGAR

Hot Water,

So, did the EMD V12 use one lubrication hole in the eccentrics to feed two connecting rods? If this crankshaft is from a V12, I would expect the eccentrics to be wider.

MELGAR

I believe that is the crankshaft for a EMD 12 cylinder most likely a 645

@MELGAR posted:

Hot Water,

So, did the EMD V12 use one lubrication hole in the eccentrics to feed two connecting rods?

Yes, but the oil supply hole in the crankpin journals is cross-drilled, thus being two holes, one 180 degrees opposite from the other/

If this crankshaft is from a V12, I would expect the eccentrics to be wider.

Why? Now, as I stated earlier, I suggest you research the design of the EMC/EMD General Motors two stroke cycle "Fork & Blade" connecting rod arrangements used on the 567, 645, and current 710 Diesel engines.

MELGAR

@Fast Mail posted:

I believe that is the crankshaft for a EMD 12 cylinder most likely a 645

There is no difference between a 12-567 crankshaft and a 12-645 crankshaft, except much later 12-645 turbocharged engines have a different firing order, in order to reduce vibrations.

Thank you Hot Water, most of my experience was on 645s and 710s Turbo-Marine and most often more cylinders. However it sure seemed familiar.