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Wurlitzer Pianino Motor Speed
By Dana Johnson

Hi:  Wurlitzer Pianinos that have the original small cast iron
open gear standard _and_ a 25-to-1 gear ratio require a higher speed
motor.  Original motors run about 1800 RPM and were manufactured by
Holtzer-Cabot.  There are other combinations of gear ratios and motor
speeds found in Wurlitzer instruments.

Many coin pianos use slow speed electric motors ranging from 1120
to 1150 RPM, and a blanket statement can't be made for any specific
manufacturer.  Depending on the individual instrument, I have seen
original motors with their original pulley system with motors as slow
as 800 RPM in a large Seeburg orchestrion with Holtzer-Cabot motor,
to an original 1750 RPM Emerson motor complete with original Electrova
data plate.

With too slow a motor speed there isn't enough vacuum, but when it's
too fast the installation becomes noisy, along with the additional wear
and tear issues to all the associated parts.

Dana Johnson


(Message sent Tue 10 Jul 2012, 18:21:11 GMT, from time zone GMT-0700.)

Key Words in Subject:  Motor, Pianino, Speed, Wurlitzer

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