CELEBRATING 80 YEARS: 1944-2024
HOLE ENLARGING CORE DRILLS

HOLE ENLARGING CORE DRILLS

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Alfa Tools Hole Enlarging Core Drills are made of high-speed steel that has a black and gold surface treatment to provide lubricity for close tolerance construction work. They are specially made for enlarging and finishing existing holes. These drills have 4 flutes and 3 flats on the shank. Ideal for use on truck frames, structural and heavy lattice work. Made in the USA.

Specifications (Click to expand):
PART # HOLE SIZE DEC. EQUIV. SHANK MIN. STARTING HOLE SIZE LENGTH (FLUTE / OAL)
HED121 3/8" 0.3750" 3/8" 1/4" 1-7/8" / 4-5/16"
HED129 1/2" 0.5000" 1/2" 5/16" 1-7/8" / 4-5/16"
HED133 9/16" 0.5625" 1/2" 3/8" 1-7/8" / 4-5/16"
HED137 5/8" 0.6250" 1/2" 25/64" 1-7/8" / 4-5/16"
HED141 11/16" 0.6875" 1/2" 7/16" 1-7/8" / 4-5/16"
HED145 3/4" 0.7500" 1/2" 15/32" 1-7/8" / 4-5/16"
HED149 13/16" 0.8125" 1/2" 1/2" 1-7/8" / 4-5/16"
HED153 7/8" 0.8750" 1/2" 17/32" 1-7/8" / 4-5/16"
HED157 15/16" 0.9375" 1/2" 9/16" 1-7/8" / 4-5/16"
HED161 1" 1" 1/2" 5/8" 1-7/8" / 4-5/16"

3/8" HOLE ENLARGING CORE DRILL
ALF-HED121
Available: 1
$51.93
1/2" HOLE ENLARGING CORE DRILL
ALF-HED129
Available: 1
$56.48
9/16" HOLE ENLARGING CORE DRILL
ALF-HED133
Available: 1
$59.68
5/8" HOLE ENLARGING CORE DRILL
ALF-HED137
Available: 1
$64.43
11/16" HOLE ENLARGING CORE DRILL
ALF-HED141
Available: 1
$71.10
3/4" HOLE ENLARGING CORE DRILL
ALF-HED145
Available: 1
$87.45
13/16" HOLE ENLARGING CORE DRILL
ALF-HED149
Available: 1
$112.93
7/8" HOLE ENLARGING CORE DRILL
ALF-HED153
Available: 1
$119.60
15/16" HOLE ENLARGING CORE DRILL
ALF-HED157
Available: 1
$130.75
1" HOLE ENLARGING CORE DRILL
ALF-HED161
Available: 1
$150.05