Disclaimer: Always refer to your equipment's technical manual. Wear nitrile gloves and safety glasses when handling anaerobic adhesives.
If a shaft has a damaged keyway, you can repair it by machining the shaft smooth and press-fitting a sleeve or gear using P80. The compound provides 3,000+ PSI shear strength, often exceeding the strength of the original press fit. lokfix p80
Installing reinforcement starter bars and dowels. 000+ PSI shear strength