Free engineering tools

NTB SpecPro special-process quality control software logo NTBSpecProSPECIAL PROCESS SOLUTIONS
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Free tools

Free engineering tools

Small calculators for welding, heat treatment, paint, coating, quality control, machining and adhesive bonding. All run in your browser, with no sign-up and no data sent; results are for information.

Also available in: Türkçe · العربية

WeldingCarbon equivalent calculator (CE, CET, Pcm)Free carbon equivalent calculator: IIW CE, CET and Pcm formulas with a general weldability and preheat assessment band for steels.WeldingWelding heat input calculatorArc energy and heat input (kJ/mm) from voltage, current and travel speed; SAW, MMA, MIG/MAG, FCAW, TIG, plasma.WeldingWeld consumable weight calculatorFree weld consumable calculator: cross-section area, kg of weld metal and kg of electrode/wire with deposition efficiency for V, X and fillet welds.WeldingWelder qualification expiry calculatorFree welder qualification expiry calculator: ISO 9606-1 6-monthly confirmation and 2/3-year revalidation dates, ASME IX 6-month continuity.Heat treatmentTempering parameter calculator (Hollomon-Jaffe)Free Hollomon-Jaffe tempering parameter calculator: P = T(K)·(C + log t) with adjustable C; equivalent tempering time at a different temperature.PaintPaint consumption and wet film thickness calculatorFree paint consumption calculator: theoretical/practical litres, m²/L spreading rate and wet film thickness (WFT) from area, DFT, volume solids and loss factor.CoatingCoating thickness ↔ mass (µm ↔ g/m²) calculatorFree coating thickness ↔ mass converter: µm ↔ g/m² with density for zinc, nickel, chromium, copper, tin and more; galvanizing and electroplating.Quality controlCp / Cpk process capability calculatorFree Cp/Cpk calculator: Cp, Cpk, Pp, Ppk and histogram from a list of measurements or mean/standard deviation; process capability against tolerance limits.MachiningCutting speed and spindle speed (RPM) calculatorSpindle speed (rev/min) from diameter and cutting speed, or cutting speed (m/min) from RPM; turning, milling, drilling.MachiningFeed rate calculator (turning, milling, drilling)Table feed rate (mm/min) from feed per revolution or per tooth, and cutting time for a given length.Adhesive bondingAdhesive joint strength estimateFree adhesive joint calculator: approximate failure load from bond area × shear strength and allowable load with a safety factor; verify by testing.
Calculation is not enough, records are needed tooNTB SpecPro modules keep the inspection record, photo, document and PDF report for your audit file in one place; on the phone in the shop, on the computer in the office.
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