2011-4.20, 4.2mm, Bordo HSS Cobalt Jobber Drill

Description: HSS Cobalt Jobber Drill

Brand: Bordo (Cobalt Tough)

Material: High Speed Steel (HSS)

Diameter: 4.2mm

Flute Length: 43mm

Overall Length: 75mm

MPN: 2011-4.20

Feed Per Revolution: 0.13mm

Spindle Speed Aluminum / Brass: 5505 RPM

Spindle Speed Cast Iron: 2164 RPM

Spindle Speed Free Cutting Steel: 3880 RPM

Spindle Speed Malleable Iron: 2436 RPM

Spindle Speed Med Carbon Steel: 2707 RPM

Spindle Speed Stainless Steel: 1083 RPM

Spindle Speed Tool Steel: 1624 RPM

Spindle Speed Wood / Plastic: 8212 RPM

Quantity Per Package: 10 pieces

SKU: 2011-4.20 Category: Cobalt HSS Co5 Tags: drill bit hss, drill bit cobalt, drill bit Brand: Bordo

Description

4.2mm HSS Cobalt Twist Drill
Bordo Metric Cobalt Tough HSS-Co5 Twist Drills.
DIN338
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 135° 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 Twist drills are extremely hard and provide superior performance and increased tool life especially in stainless steel and high tensile steel.
Bronze Finish (gold oxide) surface treatment. The metallic brown coloured low temperature temper treatment is normally only used on cobalt tools for identification purposes.