I feel like such a rookie again! Built engines professionally for a decade but I never made a mistake this stupid.
I am rebuilding the bottom end of a 2 stroke. I threw the crank in the freezer as I always do but somehow thought it a good idea to stick the bearings on the crank first. After I realized my screw up, I figured I would try to freeze the whole deal and heat the cases to get it together. No go. Bearings gotta come off the crank and be installed in the cases first.
I typically would use bearing cups to pull the bearings but this crank is a little special with sheet metal covers.
I am curious, I would estimate the interference fit to be around .0002" so I was wondering about methods to heat that inner race fast enough to get them to fall back off?
In the past I have used the red hot piece of pipe trick to transfer heat to the race but not sure on this.
any thoughts or ideas?
I am rebuilding the bottom end of a 2 stroke. I threw the crank in the freezer as I always do but somehow thought it a good idea to stick the bearings on the crank first. After I realized my screw up, I figured I would try to freeze the whole deal and heat the cases to get it together. No go. Bearings gotta come off the crank and be installed in the cases first.
I typically would use bearing cups to pull the bearings but this crank is a little special with sheet metal covers.
I am curious, I would estimate the interference fit to be around .0002" so I was wondering about methods to heat that inner race fast enough to get them to fall back off?
In the past I have used the red hot piece of pipe trick to transfer heat to the race but not sure on this.
any thoughts or ideas?