Calculators & tools
Tools for working on the drawing. Standards-based, no sign-up, no registration.
For design and purchasing
These are the calculators we use in our own work preparation. The data comes straight from the standards, not from approximation formulas. Where an exact conversion is not technically possible, the tools say so explicitly instead of feigning precision.
Tolerance calculator ISO 286
Deviations and limits for holes and shafts. Fit type, clearance and interference. Including the full IT tolerance chart.
Ra/Rz converter
Convert surface roughness in both directions, with the ISO 1302 roughness grade and the machining process that achieves it.
Thread Calculator
Tap drill, pitch, clearance hole and thread engagement for metric threads. 40 sizes from M1.6 to M36, including blind hole layout.
Material Selector
Filter 25 materials by strength, corrosion, temperature and machinability. Including what the choice will cost you in production.
Request a part
Send a drawing or 3D model. We check tolerances and surfaces for feasibility and quote within 24 hours.
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