If you will notice, the first and sixth throws are in phase and the second and fifth throws are in phase as well. It is a characteristic of nearly all inline six and v12 engines. This looks to be a v12 crankshaft.. These engine are really well balanced, no need for additional balance shafts.
Mobile phone camera, eh? You must have a very steady hand, but hey! Being a welder, I guess that's no surprise! An interesting clip. Thanks for the upload.
I worked at Mitchell Shackleton in Manchester England and we did crankshafts upto 30ft long and 30 tonne finished weight.We worked to microns on them.
what sorta steel is that.....4130 Crank steel? it looks anodized.....shit id love to machine something like that....the tolerances would have to be very high for such a large diesel otherwise it would rattle itself to pieces....we gotta lathe as big as that only we use it to machine the vacuum ring on our freeze driers
In 1970 I went around the English Electric plant in Loughborough, they had a lathe where the operator stood on the tool post the control it. I think the chuck was about 12` diameter. I suppose it`s long gone now.
@quatfro The ones we have cut have no more than .001 TIR and the bearing races are usually cut +0 -.0005 It's actually not that hard, cut them close, leave a bit, and sand them in.
@jacklav
If you will notice, the first and sixth throws are in phase and the second and fifth throws are in phase as well. It is a characteristic of nearly all inline six and v12 engines. This looks to be a v12 crankshaft.. These engine are really well balanced, no need for additional balance shafts.
mr48chevy1 4 months ago
somehow it seems like the stroke for that motor would be pretty short for what that casting is going to be made for.
bloodasp90 5 months ago
Why are the middle two throws in phase? You'd think that would put a huge load on the middle bearing.
jacklav1 5 months ago
As if this isn't a 6 not a twelve?
ldubdaman 11 months ago
i bet thats a bastard to set and get runnin true!!
brodders666 1 year ago
woooww i have never seen a 30 foot long v12 deisel before. i suppose its for a large ship. that things huuge
1rad58 1 year ago
they are cutting the journals to resurface
twotonetom98 1 year ago
Mobile phone camera, eh? You must have a very steady hand, but hey! Being a welder, I guess that's no surprise! An interesting clip. Thanks for the upload.
peteacher52 1 year ago
that looks like the crank outta my toro 21" lawn mower, this one is just a little smaller.
alderaforall 1 year ago
My shop teacher always told me not to walk on the bed ways!
emmon72cz3x 1 year ago 2
I worked at Mitchell Shackleton in Manchester England and we did crankshafts upto 30ft long and 30 tonne finished weight.We worked to microns on them.
farodave 1 year ago
that has to be the crank from your Ram :D
gbarnewall1 1 year ago
A giant lathe looks just like a little lathe, only giant.
49bobbyk 1 year ago
what sorta steel is that.....4130 Crank steel? it looks anodized.....shit id love to machine something like that....the tolerances would have to be very high for such a large diesel otherwise it would rattle itself to pieces....we gotta lathe as big as that only we use it to machine the vacuum ring on our freeze driers
cuddonengineering.co.nz
sshhrroooomm 1 year ago
In 1970 I went around the English Electric plant in Loughborough, they had a lathe where the operator stood on the tool post the control it. I think the chuck was about 12` diameter. I suppose it`s long gone now.
glennfs1954 1 year ago
holly cow
definitely not for a car
mcdemba 1 year ago
The picture wobbles because they have not machined the harmonic dampener !
davemisme 2 years ago
cool stuff
fjpete 2 years ago
why does the picture wobble like that?
Must be for a big boat.
Ibringthetruth1 2 years ago
because the vdid is taken with a mobile phone
allistairc123 2 years ago 2
@allistairc123
Mobile phone?! Please! Not low quality!
GMKBCJI 10 months ago
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I am Brazilian and work with around small and would work with some large and these
mfaduw1411 2 years ago
I am Brazilian and work with around small and would work with some large and these
mfaduw1411 2 years ago
Yeah shes a V12 for sure and looking at the crankpins sizes it must be at least a 28.
Wartsilapower 2 years ago
lol I thought, it was a pretty ordinary vid till I saw the operator being dwarfed by the job. Pretty cool
yorrickhunt06 2 years ago
What kind of tolerances do these larger cranks need to conform to regarding taper and ovality etc.? Similar to road car engines?
quatfro 3 years ago
im not sure, i a welder in the company, so its not my area of knowledge
allistairc123 3 years ago
Yes the tolerances are similar to car engines. 15-20 µm
dopaminblocker 3 years ago
@quatfro .002 of an inch
jaymanxxxx 1 year ago
@quatfro The ones we have cut have no more than .001 TIR and the bearing races are usually cut +0 -.0005 It's actually not that hard, cut them close, leave a bit, and sand them in.
Polybun 6 months ago
Thats the biggest lathe Ive ever seen. But it goes so slow, must have taken ages to machine that crankshaft.
MosinDisciple 4 years ago
it was in a slow gear to clock the shaft
it goes fast for its size!
allistairc123 4 years ago
@MosinDisciple In fact a lathe's rotation speed is directly related to the pieces diameter.
markuspatriot 7 months ago
Thats the biggest 6 cylinder crank ive ever seen,i wouldnt like to make a balls up machining that.
madeljacky 4 years ago
Looks like a V12 crankshaft... notice two oiling holes per rod journal.
olderthanme 3 years ago
Nah, i contacted the maker of the video and it was a 6 cylinder boat engine. All they were doing was checking the journals for taper and ovality.
madeljacky 3 years ago
what the hell is that out of a ship engine or something?
MrFoxman360 4 years ago
that must be for a big engine!!!???
rangiemadharry 4 years ago