Patent ID: 6957933
Filing Date: 2005-10-25
Classification: B23B,Y10T

Abstract:
1. A metalworking apparatus comprising: a threading insert having a top side, a bottom side and a front side, the front side including crests and valleys having a cutting region for cutting a workpiece, said threading insert including (i) at least one cooling channel disposed on the top side of said threading insert for each crest and each valley, each cooling channel terminating near the cutting region of the crest or valley, and (ii) a ceramic coating on said top side of the threading insert that is at least near the cutting region of the crests and valleys, but with each cooling channel on said top side being uncoated; a channel-less chip breaker having a top side and a bottom side; and a holder for holding said threading insert and said channel-less chip breaker so that the top side of said threading insert contacts the bottom side of said channel-less chip breaker and the crests and valleys face away from said holder.