2501-8.50S, 8.5mm, HSS Long Series Drill – Clam

Description: HSS Long Series Drill – Clam

Brand: Bordo

Material: High Speed Steel (HSS)

Diameter D: 8.5mm

Flute Length: 109mm

Overall Length: 165mm

MPN: 2501-8.50S

Quantity Per Package: 1 piece

Feeds per revolution: 0.17mm

Spindle Speed Aluminum / Brass: 2286 RPM

Spindle Speed Cast Iron: 899 RPM

Spindle Speed Free Cutting Steel: 1611 RPM

Spindle Speed Malleable Iron: 1012 RPM

Spindle Speed Med. Carbon Steel: 1124 RPM

Spindle Speed Stainless Steel: 450 RPM

Spindle Speed Tool Steel: 674 RPM

Spindle Speed Wood / Plastic: 3410 RPM

Description

8.5mm 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.