2500-21/64, 21/64", HSS Long Series Drill

2500-21/64, 21/64″, HSS Long Series Drill

$47.66

Description: HSS Long Series Drill

Brand: Bordo

Material: High Speed Steel (HSS)

Diameter: 21/64 inch

Diameter: 8.33mm

Flute Length: 109mm

Overall Length: 165mm

MPN: 2500-21/64

Quantity Per Package: 1 piece

Feeds per revolution: 0.17mm

Spindle Speed Aluminum / Brass: 2332 RPM

Spindle Speed Cast Iron: 918 RPM

Spindle Speed Free Cutting Steel: 1644 RPM

Spindle Speed Malleable Iron: 1032 RPM

Spindle Speed Med. Carbon Steel: 1147 RPM

Spindle Speed Stainless Steel: 459 RPM

Spindle Speed Tool Steel: 688 RPM

Spindle Speed Wood / Plastic: 3479 RPM

Out of stock

SKU: 2500-21/64 Category: Tags: , , Brand:

Description

About this item:
  • 21/64″ HSS Long Series Drill
  • 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.

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