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4KW21 Reduced-Shank Drill Bits

$28.65

Bulk orders will be discounted, please contact us.

These drill bits have three flats on their shank that help prevent the bits from slipping in the drill chuck when drilling at high speeds or under heavy loads. The bits are made from high-speed steel and provide more flexibility and absorb more shock and vibration than cobalt drill bits. Also known as Silver and Deming drill bits, these reduced-shank drill bits have a 1/2" shank and a drill diameter that is greater than 1/2". They can create larger holes than standard drill bits that have a 1/2" shank.

Product Number: 4KW21

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  • Description
Mfr Model DW1627
Measurement System Fractional Inch
Drill Bit Size 7/8 in
Decimal Equivalent 0.8750
Maximum Drilling Depth 3 in
Overall Length 6 in
Shank Type Machining Straight
Finish Machining Black & Gold
Material Machining High Speed Steel
Primary Material Application Steel
UNSPSC 27112801
Country of Origin China (subject to change)
Cutting Direction Right Hand
Flute Length 3 in
Flute Type Spiral
Standards Not Rated
Drill Bit Point Angle 135 °
Drill Bit Point Type Split Point
Number of Flutes 2
Spiral Direction Right Hand
Helix Angle 28°
Depth Dia Ratio 3xD
Shank Dia 1/2 in
Primary Material Application ISO Code P
Material Grade Machining M42
Shank Length 2-1/4 in
Coolant Fed Non-Coolant Through
Drill Diameter Tolerance +0.0000 in /-0.0015 in
Secondary Material Application Non Ferrous Material
Secondary Material Application ISO Code M
Web Construction Tapered
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