04-23-2018, 06:13 AM
Hi Bill,
Disclaimer: I have less first-hand Mac experience than any of the previous posters, but here goes:
See you later!
Doug
Disclaimer: I have less first-hand Mac experience than any of the previous posters, but here goes:
- Instructions for Hartman clutch said "260 - 300 in*lbs, NO TIGHTER." (In that case, the limitation was the crank threads. In your case, it will be your nut's paper-thin wall thickness.)
- I would never attempt a DIY weld repair on one of these cranks. The metallurgical changes would be a train wreck.
- I can't imagine good things coming from adding a 2nd keyway. Not much meat, plus notch-sensitivity.
- That leaves the keyless lapping method. Many guys have had good success with it (I'm still aspiring for that). Some guys' recipes also include adding one drop of blue (#242) Loctite to the taper.
See you later!
Doug