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aluminium alloys materials and yellow metals like coper and brass
5/32" pilot drill for easy center locating and quicker cutting penetration
• Large gullets also provide an unobscured view of the operation
Drilling using Bordo Brilliant Diamond Core Drills can be done dry however the use of water cooling may extend tool life
Black Finish Jobber Drill Set Imperial: 1/16 - 1/2 x 1/64" Rises | 29pc Carbide Tipped aluminium alloys materials and yellowBlack Finish Jobber Drills (also called blue finish) achieve their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating. This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The 118 Split Point drills are self centering and ideal for use in materials such as mild steel and cast iron. Black Finish Jobber Drills Imperial: 1 16 1 2 x
