Z-PROPremium Thread Mills_PRML

■ The same PRML can process right and left hand internal threads by using the helical interpolating process.
■ Because it cuts at the first thread, it won't make the internal threads taper and the internal threads become highly accurate.
■ When cutting, the load on the tool is small and the tool life is long.
■ Cutting resistance is reduced by turning the tool counterclockwise and machining it from the top to the bottom with 1 pass cutting.