AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

[Fred Cisin]

>> He needs a larger pulley if going from 60 to 50 ( as a motor pulley ). 
>> It needs to be 20% bigger because the motor turns slower on 50 Hz. 6/5 
>> to be exact.
On Sat, 10 Nov 2018, Chuck Guzis via cctalk wrote:
> No argument there--but the size increment is pretty small.  Consider
> that a typical motor pulley is about 19 mm in diameter, so a 20%
> increase would be only about 23 mm.

Depending on the drive, WHICH pulley should be changed?