Core Drills THREE FLUTE - STRAIGHT SHANK
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Core Drills
THREE FLUTE - STRAIGHT SHANK
MADE IN THE USA BY MICHIGAN DRILL
  • Premium grade HSS
  • Additional sizes and lengths are available
  • Used to enlarge and straighten cored, punched, or drilled holes.
  • Because of their rigidity, these drills generate closer tolerance holes and better finishes than standard drills. They may be used to enlarge holes up to 60% of tool diameter.
  • Click here to chat with sales

Core Drills
HSS Core Drills
Diameter Dec. Equiv. Flute Length Overall Part Number Your Cost Order Quantity
1/4"
.2500
3-3/4"
6-1/8"
MIC-421-1/4
$ 22.69
17/64"
.2565
3-7/8"
6-1/4"
MIC-421-17/64
$ 24.25
9/32"
.2812
3-7/8"
6-1/4"
MIC-421-9/32
$ 23.99
5/16"
.3125
4"
6-3/8"
MIC-421-5/16
$ 24.35
11/32"
.3438
4-1/8"
6-1/2"
MIC-421-11/32
$ 26.00
23/64"
.3594
4-1/4"
6-3/4"
MIC-421-23/64
$ 28.57
13/32"
.4062
4-3/8"
7"
MIC-421-13/32
$ 30.66
7/16"
.4375
4-5/8"
7-1/4"
MIC-421-7/16
$ 29.35
15/32"
.4688
4-3/4"
7-1/2"
MIC-421-15/32
$ 34.37
31/64"
.4844
4-3/4"
7-3/4"
MIC-421-31/64
$ 38.33
1/2"
.5000
4-3/4"
7-3/4"
MIC-421-1/2
$ 34.82
17/32"
.5312
4-3/4"
8"
MIC-421-17/32
$ 41.63
9/16"
.5625
4-7/8"
8-1/4"
MIC-421-9/16
$ 41.19
19/32"
.5938
4-7/8"
8-3/4"
MIC-421-19/32
$ 47.26
5/8"
.6250
4-7/8"
8-3/4"
MIC-421-5/8
$ 50.77
21/32"
.6562
5-1/8"
9"
MIC-421-21/32
$ 51.85
11/16"
.6875
5-3/8"
9-1/4"
MIC-421-11/16
$ 56.48
23/32"
.7188
5-5/8"
9-1/2"
MIC-421-23/32
$ 62.05
3/4"
.7500
5-7/8"
9-3/4"
MIC-421-3/4
$ 64.08
25/32"
.7812
6"
9-7/8"
MIC-421-25/32
$ 69.85
7/8"
.7850
6-1/8"
10"
MIC-421-7/8
$ 76.14
29/32"
.9062
6-1/8"
10"
MIC-421-29/32
$ 82.98
31/32"
.9688
6-3/8"
11"
MIC-421-31/32
$ 87.49
1-7/16"
1.4375
9-1/8"
14-3/4"
MIC-421-1-7/16
$ 90.45
1-9/16"
1.5625
9-5/8"
15-1/4"
MIC-421-1-9/16
$330.94
1-5/8"
1.6250
9-7/8"
15-5/8"
MIC-421-1-5/8
$346.05
1-13/16"
1.8125
10-1/2"
16-1/4"
MIC-421-1-13/16
$431.23
1-27/32"
1.8438
10-3/4"
16-1/2"
MIC-421-1-27/32
$461.78

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