Technical data
Engineering tools & technical data
Calculators and reference tables for the shop floor: cutting speed and feed, thread dimensions, ISO fits and conversions. Free to use, no sign-up.
01
Speed & feed calculator
Spindle speed, feed rate, metal removal rate and chip thinning for end mills.
Open →02Thread dimensions & tap drill sizes
ISO metric coarse and fine, UNC and UNF with pitch, core diameters and tap drill.
Open →03ISO 286 tolerance & fit calculator
Limit deviations for holes and shafts and the resulting clearance or interference.
Open →04Hardness & surface roughness
HRC ↔ HV ↔ HB hardness conversion and Ra roughness grades N1–N12.
Open →