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AIRCRAFT GRADE SUPER COBALT DRILL BITS

From $2.25 to $9.50
Description Drill Size Approx
Length
Part Number Price Buy
SUPER COBALT DRILL #55551-7/8"
12-03791
$3.35
Quantity
SUPER COBALT DRILL 51512"
12-03698
$3.35
Quantity
SUPER COBALT DRILL #44442-1/8"
12-03792
$2.52
Quantity
SUPER COBALT DRILL #42 (1)422-1/4"
12-04212
$2.32
Quantity
SUPER COBALT DRILL #41412-3/8"
12-04213
$2.32
Quantity
SUPER COBALT DRILL #33 (1)332-7/16"
12-04216
$2.66
Quantity
SUPER COBALT DRILL #36 (1)362-1/2"
12-04215
$2.66
Quantity
SUPER COBALT DRILL #37372-1/2"
12-03793
$2.25
Quantity
SUPER COBALT DRILL #35 (1)#352-5/8"
12-04235
$2.93
Quantity
SUPER COBALT DRILL 1/81/8"2-3/4"
12-04225
$3.40
Quantity
SUPER COBALT DRILL #40402-3/4"
12-04214
$2.32
Quantity
SUPER COBALT DRILL #30302-3/4"
12-04217
$3.35
Quantity
SUPER COBALT DRILL #28 (1)282-15/16"
12-04218
$3.35
Quantity
SUPER COBALT DRILL #27273"
12-04219
$3.70
Quantity
SUPER COBALT DRILL 5/32 (1)5/32"3-1/8"
12-04226
$3.65
Quantity
SUPER COBALT DRILL #23 (1)233-1/8"
12-04220
$3.70
Quantity
SUPER COBALT DRILL #21213-5/16"
12-14221
$3.90
Quantity
SUPER COBALT DRILL #19193-5/16"
12-04221
$3.70
Quantity
SUPER COBALT DRILL 3/163/16"3-1/2"
12-04227
$4.60
Quantity
SUPER COBALT DRILL #12 (1)123-1/2"
12-04222
$5.35
Quantity
SUPER COBALT DRILL #10103-5/8"
12-04223
$5.35
Quantity
SUPER COBALT DRILL "D" (1)"D"4"
12-04224
$6.75
Quantity
SUPER COBALT DRILL 1/4 (1)1/4"4"
12-04228
$6.50
Quantity
SUPER COBALT DRILL 5/16 (1)5/16"4-1/2"
12-04229
$9.50
Quantity
Subtotal $0.00
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Overview

These super cobalt hi-speed jobber length aircraft drill bits feature heavy duty construction to Type J aircraft specifications. Use to drill hard, tough metals, stainless steels, iron based and titanium alloys, and certain plastics. Hardness of cobalt permits speeds 30% over regular H.S.S. drills. Cobalt drills demand rigidly held, positive feed drilling equipment.

Reviews

Recreational A Verified Purchase

SUPER COBALT DRILL 51

July 11, 2021

Edward G Verified Purchase

SUPER COBALT DRILL #28 (1)

June 23, 2021

Edward G Verified Purchase

SUPER COBALT DRILL #10

June 23, 2021

Excellent quality, very sharp and stayed sharp. A couple bits in my 100 piece set are getting dull so I replaced them. Unfortunately Spruce doesnt offer all sizes, they skip some numbers, and larger sizes as well. Sure wish they had a complete selection. Its tough to find single bits from other sources with as reasonable shipping as A/C Spruce.

Brian S
May 17, 2021

Fastest delivery to my address in two (2) days after order!!! Great!

Johan A
May 17, 2021

I am learning to scratch build an airplane. This was a big help learning that process. It takes materials and I have some now :D Excellent condition and they allowed me to come and pick up the stuff myself. Awesome! Great customer service. I had a lot of questions and they did not get upset with me when I changed my mind and decided to go in another direction. They simply supported me and I purchased even more stuff! I have been using this company for decades. I first started with the supplies needed for R/C aircraft back in the 80 and 90s.

Michael
May 6, 2021

I am learning to scratch build an airplane. This was a big help learning that process. It takes materials and I have some now :D Excellent condition and they allowed me to come and pick up the stuff myself. Awesome! Great customer service. I had a lot of questions and they did not get upset with me when I changed my mind and decided to go in another direction. They simply supported me and I purchased even more stuff! I have been using this company for decades. I first started with the supplies needed for R/C aircraft back in the 80 and 90s.

Michael
May 6, 2021

Great drill bits, reasonable price and in stock in Alaska.

Barry S
May 4, 2021

These are very sharp, great drill bits. I wish the size stampings were a little better (some are readable, some are not), but the actual drill bit cutting quality is amazing.

Ray A
April 27, 2021

Great wire size drill bits couldnt be happier.

Guy
March 8, 2021

Q&A

Q: What is the length of drill bit part number 12-04212?

The 12-04212 drill bit is 2-1/4" long.

Q: Are these bits 135 degree or 118 degree cut?

They have a 135 degree split.

Q: WHAT IS THE RECOMMENDED DRILL FOR THE AN6-20A BOLT

You would need at least a 3/8 drill.

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