Обший каталог Yamawa 2016 - 2017 - страница 840

21. Features of MC-Helical Thread Mills

Various nominal diameter internal threads of the same pitch can be produced with the same thread mills. The same mill can be used for both right-hand and left-hand internal threads. Chips become very minute, and troubles caused by chips are rarely expected. Internal threads of large diameter are obtainable even with low power machines. Number of threads Size control (undersize or oversize) is easy on programming process. Thus, internal threads with voluntary thread limits can be obtained. When using MC-Helical threads mills for producing taper pipe threads, the threads are produced in a perfect cutting circle. With no stop marks (stop marks are inevitable in taper pipe thread tapping), high quality pressure-tight joint can be made.

Right hand thread

Central axis of cutters Central axis of cutters

Central axis of work material Conventional Climb Central axis of work material

milling for milling for through hole blind hole

Left hand thread

Central axis of cutters Central axis of cutters

Climb Conventional Central axis of work material Central axis of work material milling for milling through hole for blind hole

Note : Basically, conventional milling is recommended due to excellent chip ejection. However, climb milling is recommended in the case of poor horse power and poor rigidity of the machine.