pora 7.2mm ø7.2mm HSS-R

L1: 109mm, L2: 69mm, point angle 118°, helical angle 25-30°, drilling syvyys: 5 x ø, tolerance H8. DIN338N, rolled, steam-treated twist drill made from heavy-duty high speed teräs, sopii teräs ˂900N/mm² and cast iron also for brass and bronze, manufacturing procedure solidifies the materiaali: more elasticated, more resistant to fracture, sopii robust drilling (e.g. hand-held drilling machine)
HSS-R
ø7.2mm