Quoted from Ballyoldboy:
It will run 20% slower at 50 Hz. You have it the other way round. Living in the UK I suffer from this all the time
Sorry the quote didn't come up from the few posts above me
yes, that was wrong. It was a different motor part number that ran at 25 rpm. There's three main documented rpms of mixer/CU shaded pole motors:
1] the earlier motors with only two lugs on the stator winding ran 19 rpm at 60Hz. Those will run slower and hotter at 50Hz
2] later motors with three lugs on the windings - common, 50Hz and 60Hz. Like E-119-462 and E-119-359
Keeping in mind I mostly ignored my motors class in school, one possibility is the different lugs will alter the magnetic field strength and the "slip" of the rotor in the field, allowing the speed to stay about the same at 50 or 60Hz. Since slip would be dependent on torque requirements (resistance to shaft turning due to clutches and switch lifting), that would kinda explain why there's different motor part numbers for different games/game types.
Or the lugs are just for managing the power and the motor runs around 23.4 rpm at 60Hz and 18.7 rpm at 50Hz.
Got a machine with 50Hz lugs and want to estimate the rpm? ... or know someone who didn't skip all but two of their motor class lectures?
3] the E-119-370 motor was 25 RPM, 50Hz only and sometimes says "Belgium" in the manuals.
anyway, the motors mostly ran at 19 RPM, but some ran at 23 or 25. Afaik, the faster motors were just on games well after Bounty.
Bounty has two motors in the manual - E-119-212 (60Hz) and E-119-234 (50Hz). The only difference is the stator....I assume the length of wire in the winding.