⚙️ Friction Coefficients

F_f ≤ μ_s · N (static — force builds up to limit)  |  F_f = μ_k · N (kinetic — sliding)  |  μ_s = static (breakaway) coefficient  |  μ_k = kinetic (sliding) coefficient
Values are indicative — actual friction depends heavily on surface roughness (R_a), contact pressure, temperature and contamination.
■ low (<0.2)   ■ medium (0.2–0.5)   ■ high (>0.5)