| Author | Message | ||
     Dean Brown (Deanbrown3d) Senior Member Username: Deanbrown3d Post Number: 779 Registered: 02-2002 |
Any concensus on these? It's just a surface coating, as the drills are HS steel. I may be wrong but I can't see the cutting edge maintaining any coating for more than about 2 seconds on drilling through steel. So is it for lubrication or cooling or what? Do people buy them? Thanks Dean |
