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439T74 Taper-Length Drill Bits

$59.99

Bulk orders will be discounted, please contact us.

These bits have a straw/bronze finish that improves their wear resistance. Cobalt drill bits tolerate higher drilling speeds and are harder and more wear-resistant than high-speed steel drill bits. They provide some shock absorption and can be used in handheld power tools. These bits have spiral flutes that evacuate chips as the bits drill into a workpiece.

Product Number: 439T74

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  • Description
Mfr Model C16803
Measurement System Fractional Inch
Drill Bit Size 31/64 in
Decimal Equivalent 0.4844
Maximum Drilling Depth 4-3/4 in
Overall Length 7-3/4 in
Shank Type Machining Straight
Finish Machining Straw/Bronze
Material Machining Cobalt
Primary Material Application Aluminum; Brass; Bronze; Copper
UNSPSC 27112801
Country of Origin USA (subject to change)
Cutting Direction Right Hand
Flute Length 4-3/4 in
Flute Type Parabolic
Standards ASME B94.11M-1993
Drill Bit Point Angle 135 °
Drill Bit Point Type Split Point
Number of Flutes 2
Spiral Direction Right Hand
Helix Angle 35°/45°
Depth Dia Ratio 10xD
Shank Dia 31/64 in
Primary Material Application ISO Code N
Material Grade Machining M42
Drill Length Class Taper Length
Sheeter Drill No
Drill Point Length 0.1003 in
Shank Length 3 in
Coolant Fed Non-Coolant Through
Drill Diameter Tolerance +0.0000 in /-0.0010 in
Secondary Material Application Alloy Steel; Carbon Steel; Stainless Steel
Secondary Material Application ISO Code M; P
Number of Coolant Holes 2

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