Обший каталог Yamawa 2016 - 2017 - страница 842

22. Features of MC-Helical Thread Mills
Description of products


Metric thread Metric thread
[ Minor dia. basis] [ Tool basis]
Tool cut Tool transverse


where,
: Nominal size of internal threads
: Basic minor diameter of internal threads
: Minor diameter before cutting
: Outside diameter of tool
: 0.866025P
: Pitch
: Tolerance of pitch diameter for producing internal thread
: Shrinkage after cutting
(Set up in the middle of pitch diameter tolerance)
: Difference between of basic thread profile and O.D. of the cutters.


■Approaching and leaving to and from work material
On approaching and leaving to and from work material, the cutter must always be traversed in
helical interpolating movement so that the cutter enables smooth cutting in and out. And it is
necessary to cut the material gradually by the lead of screw thread. Otherwise, threads can be
thinned.
Initial cutting A B
Information
Technical


Technical-67
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