Metric - Black HSS Jobber Drill Set in ABS Plastic Case
Bordo Black Knight M2 HSS Jobber Drills DIN338 And ANSI B94-11..
All About 118° Split Point (crankshaft point)
The split point is self-centering and reduces the need for end thrust.
Friction at the workpiece is reduced. 118° point angles are ideal for use in materials such as mild steel and cast iron.
The 118° point creates easily controlled chips that are wide and thin.
All About Drill Bit Surface Treatment
Black 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 result is increased tool life. Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.
Contents
1 mm Black HSS Jobber 1 1.5mm Black HSS Jobber 1 2mm Black HSS Jobber 1 2.5mm Black HSS Jobber 1 3mm Black HSS Jobber 1 3.5mm Black HSS Jobber 1 4mm Black HSS Jobber 1 4.5mm Black HSS Jobber 1 5mm Black HSS Jobber 1 5.5mm Black HSS Jobber 1 6mm Black HSS Jobber 1 6.5mm Black HSS Jobber 1 7mm Black HSS Jobber 1 7.5mm Black HSS Jobber 1 8mm Black HSS Jobber 1 8.5mm Black HSS Jobber 1 9mm Black HSS Jobber 1 9.5mm Black HSS Jobber 1 10mm Black HSS Jobber 1 10.5mm Black HSS Jobber 1 11mm Black HSS Jobber 1 11.5mm Black HSS Jobber 1 12mm Black HSS Jobber 1 12.5mm Black HSS Jobber 1 13mm Black HSS Jobber 1