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4UM83 Reduced-Shank Drill Bits

$34.37

Bulk orders will be discounted, please contact us.

High-speed steel drill bits 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: 4UM83

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  • Description
Mfr Model 4UM83
Measurement System Fractional Inch
Drill Bit Size 57/64 in
Decimal Equivalent 0.8906
Maximum Drilling Depth 79.38 mm
Overall Length 6 in
Shank Type Machining Straight
Finish Machining Black Oxide
Material Machining High Speed Steel
Primary Material Application Alloy Steel; Carbon Steel; Cast Iron; Wood
UNSPSC 23171609
Country of Origin USA (subject to change)
Cutting Direction Right Hand
Flute Length 3-1/8 in
Flute Type Spiral
Standards Not Rated
Drill Bit Point Angle 118 °
Drill Bit Point Type Conventional Point
Number of Flutes 2
Spiral Direction Right Hand
Helix Angle 28°
Depth Dia Ratio 4xD
Shank Dia 1/2 in
Primary Material Application ISO Code K; P
Material Grade Machining General Purpose
Shank Length 57.15 mm
Coolant Fed Non-Coolant Through
Drill Diameter Tolerance +0.0000 in /-0.0012 in

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