How out of balance is the KNIFE EDGED crankshaft?

As a retired machinist I watched this with great interest. From 1987 to 2000 I worked for a slury pump company in Sydney, Australia. Saw pump impellers static balanced daily. Material was removed by fixed offset turning on a vertical borer. The machines were old and worn out but new machines would never have lasted long either, esp with the high chrome alloys used for the impellers. The impellers could weigh up to 6 metric tons, The fellow who mainly did the balancing had a note book of sizes, materials and removal estimates created over many years. He NEVER let it out of his sight.

Great insight into what goes off, we all know they get balanced...but not how 👍 Now we do!

So they took a bunch of weight off the counter weights and then to balance had to take off some more. I believe the original balance included bob weights to replicate the additional weight of the rods and pistons .

I would not argue that the crank itself is balanced. but even with a set of rods and pistons of identical weight to each other the reduced balance weights will increase the bending force on the crank. Increasing bearing load and forces on the block. You could take the balance weights off the crank completely yet still get it to balance in this machine.

Every day's a school day, very much enjoyed this one 👌

Absolutely love this machine makes it look so easy when you have the right kit. 👍👍 great video as always. 👍

Like others here watching, i too have always wondered how you do this . Thank you for showing this mate.

Hats off to you sir. I'm a machinist really want to learn more about auto motive machining. Old school still the best for me .great video ...

Awesome vid mate...you learn something new every day...cheers from NZ.

that's an amazing bit of kit!

Very interesting, thanks for showing us.

As a mechanic it’s nice to see what you lads do 👍

Brilliant video. Learn so much from watching you and what you do. I will be in contact soon about some thing I need building

Spot on, interesting video lads

Thanks Lee! ...I've always wondered how these parts are balanced. I Love that old balancing machine!

Very interesting, never seen that done before.

Interesting stuff !

A 17.5 lb weight savings is pretty sweet. 🏁😎👍👍

The escort cosworth lumb was beautiful and would proudly have that front & centre in my front room.

cool video and good info