tapping process

action after apprentice bit casting chip close closeup cnc collar coolant cutting danger drill drilling engineer engineering factory from grind handle hard hole indoor indoors industrial industry job jobs labor laborer labour labourer lathe length look low machanic machine machinery machinist male man manual material mechanic metal mill milling nobody occupation one operate operating operator overall process profession professional professions safe safety shop skill standing stop supervisor tap tapping technician thread tool train training work worker working workplace workshop