Prime technologies offers a full spectrum of testing machines. Roundness measuring instrument is used to measure roundness, concentricity, axiality, flatness, parallelism, squareness, axis straightness, run out and waviness with magnifications from 100 to 20000 data omission program. Evaluations - lsc, mic, mcc, mzc; eccentricity value x, y, [, max p and v value roundness [p + v]; frequency spectrum analysis; and filters 1 500, 1 150, 1 50, 1 15, 15 500. Spindle accuracy: roundness error 0.1 µm + 0.0005 µm/mmh, according to iso minimum zone assessment.