Boring very deep holes – Sandvik Coromant Silent tools - How to reduce vibration in metal cutting User Manual
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Sandvik Coromant – How to reduce vibration in metal cutting
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Boring very deep holes
The internal machining of large diameter holes, deep holes and a combina-
tion of both usually needs tool solutions where stability during machining
is maximized through combinations of tool solutions. In addition to basic
points such as maximum bar diameter; sufficient chip evacuation; positive
insert geometry; 90 degree entering angle; correct insert shape; small nose
radius and sharp cutting edge; special tool features may need to be consid-
ered to provide the boring bar with every weapon there is against vibration
tendencies, especially when tolerances are close and surface finish is an
issue.
Stability starts at the back end, where the boring bar is clamped in the
machine. Coromant Capto or complete encasement of the bar in a sleeve
should always be the case.
Tool clamping at the front end and
back end are important performance
factors for machining with long
boring bars.