2021-1.00, 1mm, Bordo HSS Black Stub Drill

Description: Black Stub Drill

Brand: Bordo

Material: High Speed Steel (HSS)

Diameter D: 1mm

Flute Length: 6mm

Overall Length: 26mm

MPN: 2021-1.00

Quantity Per Package: 10 pieces

Feeds per revolution: 0.04mm

Spindle Speed Aluminum / Brass: 19429 RPM

Spindle Speed Cast Iron: 7644 RPM

Spindle Speed Free Cutting Steel: 13696 RPM

Spindle Speed Malleable Iron: 8600 RPM

Spindle Speed Med. Carbon Steel: 9555 RPM

Spindle Speed Stainless Steel: 3822 RPM

Spindle Speed Tool Steel: 5733 RPM

Spindle Speed Wood / Plastic: 28984 RPM

SKU: 2021-1.00 Category: Stub Drills Tags: drill bit, drill bit hss, drill bit black stub Brand: Bordo

Description

1mm HSS Black Stub Drill
Stub drills (screw machine twist drills) have a shorter overall length than Twist drills for maximum rigidity and longer tool life.
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.
They are designed primarily for machining operations in lathes (screw machines) but can also be used in manual hand held drills.
Bordo Stub Drills have two helical flutes with 30 degrees of helix angle. This provides fast chip ejection and very stable drilling operation.
Black Finish Stub Drills (also called blue finish) achieve their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating.
Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.