Mechanical & Motion

Power factor from measured real and apparent power, or from P, V, and I.

Bearing speed screening value DN = bore (mm) × rpm.

ISO basic rating life from C, P, and speed. Not a prediction of actual service life.

Driven pulley speed from pitch diameters, with optional belt slip.

Linear belt speed from pulley diameter and rotational speed. No slip.

Tangential line force from drum or pulley torque and radius.

Estimated bolt preload from installation torque and nut factor. Estimate only.

Output torque through a gear ratio, with optional transmission efficiency.

Speed ratio through a simple two-gear pair.

Ideal lever mechanical advantage from effort and load arms.

Efficiency and lost power from mechanical input and output power.

NPSH available at the pump suction from absolute pressure, vapor pressure, and optional velocity head.

Ideal mechanical advantage from the number of supporting rope segments.

Pump differential head from suction and discharge pressure, with optional elevation and velocity terms.

Fluid power delivered by a pump from flow and head.

Shaft power from hydraulic power and pump efficiency.

Dimensionless Reynolds number from velocity, diameter, and dynamic or kinematic viscosity.

Average rotational speed from a revolution count and elapsed time.

Mechanical shaft power from torque and rotational speed.

Nominal elastic torsional shear in a solid circular shaft.

Elastic angle of twist for a uniform circular shaft.

Real, apparent, and reactive power for a single-phase AC load.

Normal stress from force and cross-sectional area.

Balanced three-phase power from line-to-line voltage and line current.

Applied torque from force and lever arm. Angle is between the arm and the force.

Shaft torque from mechanical power and rotational speed.

Mechanical work for a constant force acting through a distance.