The good news is that it’s just an under powered motor.....the bad news is that you need a decent motor and the shaft is highly likely to be imperial.....which is serious money!!
The only other options are to bore out the pulley to a metric standard size, deepen the key way. Buy a metric 5 stage pulley. Turn down the shaft of a metric motor and re cut the Keyway. Or drop probably around £300 on an imperial motor
The only other options are to bore out the pulley to a metric standard size, deepen the key way. Buy a metric 5 stage pulley. Turn down the shaft of a metric motor and re cut the Keyway. Or drop probably around £300 on an imperial motor