Bordo 8.5mm HSS Cobalt Jobber Drill - Carded

135° Split Point (crankshaft point)
Split point is self centering and the short distance from the drill axis to the outer corners results in faster penetration, reducing the need for end thrust. The 135º point should be used to cut harder steel materials especially in deep hole applications. In these situations it will produce thicker chips minimising work hardening of the cavity. Faster penetration reduces abrasion and friction along the cutting edges. Cobalt HSS jobber drills are extremely hard and provide superior performance and increased tool life especially in stainless steel and high tensile steel.

Bronze Finish (gold oxide). The metallic brown coloured low temperature temper treatment is normally only used on cobalt tools for identification purposes.

Part No. 2011-8.50S
Reference No. D1080085
Barcode 9326518036050
Diameter (mm) 8
Flute Length (mm) 75
Overall Length (mm) 117
Pack Quantity 1
Spindle Speed Stainless Steel RPM 540
Spindle Speed Tool Steel RPM 809
Spindle Speed Cast Iron RPM 1079
Spindle Speed Malleable Iron RPM 1214
Spindle Speed Med. Carbon Steel RPM 1349
Spindle Speed Free Cutting Steel RPM 1933
Spindle Speed Aluminium/Brass RPM 2743
Spindle Speed Wood/Plastic RPM 4092
Feed per revolution mm 0.22