To calculate the percentage over speed, we need to find out how much the actual speed differs from the desired speed, and then express this difference as a percentage of the desired speed.
The actual speed is 268 rpm, and the desired speed is 250 rpm. The difference between these two speeds is:
268 rpm - 250 rpm = 18 rpm
To express this difference as a percentage of the desired speed, we divide the difference by the desired speed and multiply by 100:
(18 rpm / 250 rpm) x 100 = 7.2%
Therefore, the percentage over speed is 7.2%.
A drilling machine should be set to 250 rpm. The nearest speed available on the machine is 268 rpm. Calculate the percentage over speed.
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