Mechanical Formulas

Need to Find	Formula
Circumference of a Circle	3.1416 x Diameter
Arc Length	0.017453 x Radius x Angle
Velocity (feet per minute)	FPM=0.262 x Diameter x rpm
Torque (inch pounds)	T=(HP x 63025)/rpm
Torque (inch pounds)	T= Force (lbs) x Radius (in)
Horsepower	HP= (T (in-lbs) x RPM)/63025
Horsepower	HP=(Force x FPM)/33000
Belt or Chain Pull	(HP*126000)/(RPM x Diameter inches)