Calculate Power from 100mm Rotating Shaft

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The discussion focuses on calculating the power transfer of a 100 mm shaft rotating at 150 RPM, using mild structural steel properties. The calculations involve determining the polar moment of inertia and torque, resulting in a power output of approximately 164.32 watts or 0.22 horsepower. There is a mention of material differences, suggesting that a bamboo shaft would transfer less power than a steel one. The user seeks verification of their calculations and results. The conversation emphasizes the importance of material properties in power transfer calculations.
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Homework Statement



Calculate the power that can be safely transferred by a 100 mm shaft rotating at 150 revolutions per minute.



Homework Equations



Radius = diameter/2=100/2=50 mm
Shaft from mild structural steel
K=6
T= 320 N/mm2


The Attempt at a Solution




J=(3.14/2)*r4
J=(3.14/2)*504= 1.57*6250000=9812500
T=TJ/KY=320*9812500/6*50=3140000000/300=10466666.67 Nmm
Changed to Nm= 10.466 Nm
Per minute 150
Per second = 150/60 = 2.5per second
Angular velocity= 2.5 *(2*3.14)= 2.5*6.28=15.7 rad/sec
Power=15.7*10.466=164.3162 Nm/sec= 164.3162 watts
Power changed to horsepower= 220.35162 (hp) ??


Please check my result:D
 
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can anyone help?
 
John78 said:

Homework Statement



Calculate the power that can be safely transferred by a 100 mm shaft rotating at 150 revolutions per minute.Please check my result:D

I guess if the shaft is made of bamboo, less power transferred than if it is made of steel.
 

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