Free Engineering Tools
A small set of free calculators and selectors I use in design and manufacturing work — shared here for anyone speccing parts, choosing materials, or sizing an enclosure. No sign-up, no cost.
Estimate the weight of plate, bar, tube and angle across seven metals, in US or metric units — for freight, handling and costing.
Open tool →Check whether two dissimilar metals can safely touch, based on the anodic index, with a full compatibility matrix and mitigation tips.
Open tool →Answer a few questions about the install environment and get the right NEMA type, the approximate IP equivalent, and a material suggestion.
Open tool →Find recommended tightening torque and clamp load for SAE and metric fasteners, with nut-factor adjustments for lubrication.
Open tool →Look up the right tap drill (75% thread) and clearance drill for UNC, UNF and metric threads — filterable and searchable.
Open tool →Compute bend allowance, bend deduction and flat-pattern length for sheet metal, with material K-factor presets.
Open tool →Convert surface speed to spindle RPM and feed rate for milling and drilling, by workpiece and tool material.
Open tool →Russell Consulting LLC delivers mechanical design, CAD drafting and manufacturing engineering — from concept through production.
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