Engineering Handbook

Original concise engineering topics with equations, variables, examples, source metadata and related calculators.

PUBLISHED HANDBOOK TOPICS

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Shaft torsionHow torque, selected allowable shear stress and circular shaft geometry are related in a transparent preliminary sizing check.Open topic →Sheet-metal developmentWhy bend allowance follows the neutral axis and why approved bend-test data controls production blanks.Open topic →Pump hydraulic powerA compact explanation of hydraulic power, flow conversion and efficiency for preliminary water-pump sizing.Open topic →Force and free-body diagramsA practical starting point for turning a physical component into a solvable force model.Open topic →Static equilibriumHow force and moment balance determines support reactions before component stresses are considered.Open topic →Stress, strain and elastic modulusThe distinction between load intensity, deformation and stiffness in a small-strain elastic material model.Open topic →Beam bending stressHow bending moment and section modulus provide a preliminary elastic stress screening value.Open topic →Rolling-bearing rating lifeA clear explanation of basic L10 rating life and the information it does not provide.Open topic →Gear-pair kinematicsThe tooth-count relationship that determines speed ratio in an ideal simple external gear pair.Open topic →Helical compression springsHow spring rate depends on wire diameter, coil diameter, active turns and material shear modulus.Open topic →Bolted-joint preloadWhy proof load and target preload are starting points, not a substitute for joint-specific tightening control.Open topic →Goodman fatigue screeningA preliminary way to combine mean and alternating stress before a detailed fatigue assessment.Open topic →Pipe flow velocityThe continuity calculation that links a pipe’s inside area, volumetric flow and mean velocity.Open topic →Overall heat-transfer rateA practical interpretation of the U–A–ΔT relation for preliminary heat-exchanger or wall-transfer estimates.Open topic →Milling speed and feedHow cutting speed, tool diameter, teeth and feed per tooth create initial machine settings for milling.Open topic →Measurement and unit controlWhy a sound engineering calculation begins with traceable measurements and deliberate unit conversion.Open topic →