gear cutting production, sharpening the worm cutter on the sharpening machine with an abrasive stone

abrasive background chips closeup cog cutter cutting cylindrical engineering gear helical hob hobbing industrial industry involute lubricant lubrication machine machinery machining manufacture manufacturing master mechanical metal metallic metalwork metalworking mill milling oil part power precision processing production quality shaper sharpening shaving spline steel stone technology teeth tool tooth work working worm