Crankshaft Cone/taper Reshaping
#1
Posted 04 December 2019 - 01:06 PM
material is missing due to flywheels friction welding themselves onto the crank.
not traditional gas and oxygen welding. this will probably add too much heat
co2 welding will maybe make a welding that is not attached enough sort of like a cold soldering or what do you think?
tic, stick welding? which type would be best, or is it impossible?
#2
Posted 04 December 2019 - 01:17 PM
what ever process, your looking at regrinding it to shape once welding,
depending what it looks like/how bad it is, choices are,
use as is once cleaned up if not too pitted
have it reground slightly, but there are definate limits to this as 1 thou off moves the flywheel 7 thou up the crank (iirc)
Possibly have is "metal sprayed" & resurfaced, this is a sort of arc metal process that deposits material back on. Ive known of layhaft bearing faces being reclaimed this way using a tungsten spray which is apparently really durable ( at least for bearing surfaces)
I'd lay money on it being cheaper to find another crank though unless its somthing spcecial
#3
Posted 04 December 2019 - 03:27 PM
what ever process, your looking at regrinding it to shape once welding,
depending what it looks like/how bad it is, choices are,
use as is once cleaned up if not too pitted
have it reground slightly, but there are definate limits to this as 1 thou off moves the flywheel 7 thou up the crank (iirc)
Possibly have is "metal sprayed" & resurfaced, this is a sort of arc metal process that deposits material back on. Ive known of layhaft bearing faces being reclaimed this way using a tungsten spray which is apparently really durable ( at least for bearing surfaces)
I'd lay money on it being cheaper to find another crank though unless its somthing spcecial
its a cam6581 metro turbo crank, so a bit special I guess.
I think it will be difficult finding someone to do this metal spraying method in Denmark.
I read that someone had success filling the pits with chemical metal, but it does not sound to me like something that would last.
#4
Posted 04 December 2019 - 05:23 PM
There are some specialist companies who reclaim and repair Crankshafts.
For this job in particular, I would strongly suggest you approach one of them.
Getting this wrong won't just result in the flywheel coming loose but can also be a very serious safety issue.
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