2501-4.20S, 4.2mm, HSS Long Series Drill – Clam

Description: HSS Long Series Drill – Clam

Brand: Bordo

Material: High Speed Steel (HSS)

Diameter D: 4.2mm

Flute Length: 86mm

Overall Length: 146mm

MPN: 2501-4.20S

Quantity Per Package: 1 piece

Feeds per revolution: 0.1mm

Spindle Speed Aluminum / Brass: 4857 RPM

Spindle Speed Cast Iron: 1911 RPM

Spindle Speed Free Cutting Steel: 3424 RPM

Spindle Speed Malleable Iron: 2150 RPM

Spindle Speed Med. Carbon Steel: 2389 RPM

Spindle Speed Stainless Steel: 956 RPM

Spindle Speed Tool Steel: 1433 RPM

Spindle Speed Wood / Plastic: 7246 RPM

Description

4.2mm HSS Long Series Drill – Clam
ANSI B94-11
118° chisel point with 30° helix.
Chisel point is suitable for general purpose drilling.
Black Finish Twist 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.