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Thank you for the recommendation. And link. Whatever I end up doing loctite will be involved.

Thanks for info????

not sure if reply went thru. thanks for suggestion. I think that would help. I'll probably broach a new key slot in the pulley bore too. add a couple more set screws. and loctite everything.

Thx or idea. do you recommend the strongest Loctite? Could I still pull of the pulley later on with pulley puller?

Im not certain this is the correct forum category for this question... if not, please recommend correct forum topic.
I have a custom built CBC Hotwire machine with 2 animatics motors (x&y), Apex...