
Match collet bore shape to stock: round by diameter, hex, square and triangle by across-flats. BQUQ machines shaped bores to 0.005 mm class, ISO9001.

Spring collets grip a size range and center precisely; solid collets grip one size with max stiffness. BQUQ machines both to 0.005 mm class, ISO9001.

Read collet size charts for 36/46/52/60/630/643 stock-first: bore matches bar, hex by across-flats. BQUQ machines them to the 0.005 mm class (ISO9001).

Type numbers 36/46/52/60/630/643 are collet family codes, not bar sizes. BQUQ machines auto-lathe spring collets to the 0.005 mm class under ISO9001.
