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4UM72 Reduced-Shank Drill Bits

$21.20

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: 4UM72

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  • Description
Mfr Model 4UM72
Measurement System Fractional Inch
Drill Bit Size 23/32 in
Decimal Equivalent 0.7188
Maximum Drilling Depth 3 in
Overall Length 6 in
Shank Type Machining Straight
Finish Machining Black Oxide
Material Machining High Speed Steel
Primary Material Application Cast Iron; Steel
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 32°
Depth Dia Ratio 4xD
Shank Dia 1/2 in
Primary Material Application ISO Code M; P
Material Grade Machining General Purpose
Shank Length 2-7/8 in
Coolant Fed Non-Coolant Through
Drill Diameter Tolerance +0.000 in /-0.012 in
Secondary Material Application Non Ferrous Metals
Secondary Material Application ISO Code K; N
Web Construction The Web Joins the Lands, Which Are the Outer Portion of the Drill Body Between Two Adjacent Flutes

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