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

Chuck Guzis cclist at
Sat Nov 10 14:38:14 CST 2018

On 11/10/18 12:33 PM, Fred Cisin via cctalk wrote:
>>> 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?

The motor drive pulley is the easiest.  You might even find a ready-made
one in an engineering findings catalog.

Alternatively, consider this YT video for a DIY frequency changer:


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