It depends HOW the sheared shaft looks...A clean break......OR was it twisted..? Manufacturers make parts in "Lots" of say 10 to 100 pieces. If the "Lot" was improperly
Heat Treated ..it may be too HARD..Brittle. It might fracture in a matter of hours. If it is too soft..it will Twist.
Heat Treating of the final part is very important.. and VERY
time/temperature sensitive during the process.........
NB