If a machine is
attached to a motor ad you know the RPM of motor then you can calculate the RPM
of machine, in case you want to change the setup or installing a new machine
and want an output of required RPM.
If you are using a
motor with a speed of 1400 RPM then what
will be the RPM at machine.
As above mentioned we
have a 2 inch pulley on motor which is rotating with 1400 RPM and connected to
a pulley of 10 inch, what will be the RPM here.
Well the pulley is 10
inch, which is 5 times bigger than the motors pulley so the RPM here will be
1/5th of the motor speed, as a calculation we do:
RPM at Center Pulley =
Motor Pulley x Motor RPM
Center Pully
RPM at Center Pulley =
2 x 1400 = 280 RPM
10
The same way the
center 10 inch pulley is coupled with a 3 inch pulley now we know the RPM are
280 at that pulley. Now calculating the RPM at machine.
RPM at Machine = Center
Pulley x RPM at Center Pulley
Machine Pulley
RPM at Machine = 3 x
280 = 84 RPM
10
Now we know the RPM at
machine which are 84.
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