Articles, guides and industry standard reference tables — organized by discipline.
Gear design, fasteners, stress analysis, machining and more.
Circuit analysis, power systems, and electronics fundamentals.
Structural loads, beam analysis, and foundation design.
A practical reference table for turning and drilling cutting conditions, including recommended cutting speed, depth of cut, and feed by tool material, workpiece material, strength/hardness range, and drill diameter bands.
A grounded guide to rolling bearing service life — what L10 actually means statistically, why rated life diverges from real-world performance, how to apply ISO 281 modified life factors, and the three calculation mistakes that silently wreck bearing selections.
A practical guide to gear selection and system design — covering gear types, key parameters (module, tooth count, pressure angle), material choices, centre distance, backlash, and strength verification. Includes hard-won tips on tooth pairing, lubrication, and weight reduction design.
A complete notation reference for gear design calculations — geometric parameters, load factors, strength properties, and safety factors — per GB/T 2821-2003 and ISO 701:1998, with full LaTeX symbol rendering.
A comprehensive comparison of all major gear transmission types — involute cylindrical, bevel, worm, planetary, few-tooth-difference, and harmonic drives — covering key characteristics, transmission ratios, power capacities, speed ranges, and typical industrial applications for mechanical design selection.
A cross-reference table of metric coarse thread standards covering thread form, diameter-pitch series, basic dimensions, tolerances, limit deviations, preferred thread limits, and gauging — aligned across ISO, China GB/T, Germany DIN, France NF, Japan JIS, Russia GOST, USA ASME, and UK BS.