close-up of control wheels of feed on a machine tool

accuracy blur bolt brown closeup color concept control craft craftsman cutting detail dirty engineering exactness feed finger gauge gray grooved hand handle hold hole human idea industrial industry knob lathe lever machine machinery machining machinist macro manufacture measure measurement measuring mechanic mechanical metal metallic milling nonius nut occupation operator perfect precise precision production quality scale silver skill steel technical technology tool turner turning vernier wheel wheels work worker working workman workplace