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Aircraft Grade Super Cobalt Drill Bits

From $1.65 to $6.85
Description Drill Size Approx
Length
Part Number Price Buy
Super Cobalt Drill #55551-7/8"
12-03791
$2.35
Quantity
Super Cobalt Drill 51512"
12-03698
$2.35
Quantity
Super Cobalt Drill #44442-1/8"
12-03792
$1.95
Quantity
Super Cobalt Drill #42 (1)422-1/4"
12-04212
$1.70
Quantity
Super Cobalt Drill #41412-3/8"
12-04213
$1.70
Quantity
Super Cobalt Drill #33 (1)332-7/16"
12-04216
$1.95
Quantity
Super Cobalt Drill #36 (1)362-1/2"
12-04215
$1.95
Quantity
Super Cobalt Drill #37372-1/2"
12-03793
$1.65
Quantity
Super Cobalt Drill #35 (1)#352-5/8"
12-04235
$1.95
Quantity
Super Cobalt Drill 1/81/8"2-3/4"
12-04225
$2.65
Quantity
Super Cobalt Drill #40402-3/4"
12-04214
$1.85
Quantity
Super Cobalt Drill #30302-3/4"
12-04217
$2.35
Quantity
Super Cobalt Drill #28 (1)282-15/16"
12-04218
$2.45
Quantity
Super Cobalt Drill #27273"
12-04219
$2.90
Quantity
Super Cobalt Drill 5/32 (1)5/32"3-1/8"
12-04226
$2.65
Quantity
Super Cobalt Drill #23 (1)233-1/8"
12-04220
$2.70
Quantity
Super Cobalt Drill #21213-5/16"
12-14221
$2.85
Quantity
Super Cobalt Drill #19193-5/16"
12-04221
$2.85
Quantity
Super Cobalt Drill 3/163/16"3-1/2"
12-04227
$3.35
Quantity
Super Cobalt Drill #12 (1)123-1/2"
12-04222
$3.75
Quantity
Super Cobalt Drill #10103-5/8"
12-04223
$3.75
Quantity
Super Cobalt Drill D (1)"D"4"
12-04224
$4.95
Quantity
Super Cobalt Drill 1/4 (1)1/4"4"
12-04228
$4.85
Quantity
Super Cobalt Drill 5/16 (1)5/16"4-1/2"
12-04229
$6.85
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.
   
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Reviews

Worked like a charm

Martin M Verified Purchase

Super Cobalt Drill 5/32 (1)

September 3, 2024

Could not be happier. thank you.

Martin M Verified Purchase

Super Cobalt Drill 1/8

September 3, 2024

Raymond F Verified Purchase

Super Cobalt Drill #40

March 28, 2024

Delivered as ordered

Chuck W Verified Purchase

Super Cobalt Drill #40

February 13, 2024

Delivered as ordered. Havent had a chance to use it yet

Chuck W Verified Purchase

Super Cobalt Drill #12 (1)

February 13, 2024

Simon V Verified Purchase

Super Cobalt Drill #40

February 13, 2024

The drills worked to drill out old rivets in my project.

Edward H Verified Purchase

Super Cobalt Drill #10

February 9, 2024

Silver S Verified Purchase

Super Cobalt Drill #30

January 29, 2024

Silver S Verified Purchase

Super Cobalt Drill #40

January 29, 2024

Good drills are getting hard to find, and these have always given good service.

Marc B Verified Purchase

Super Cobalt Drill #30

January 11, 2024

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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.

Q: Which number is the diameter 3/32?

42 would be slightly under and 41 would be slightly over 3/32.

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