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AIRCRAFT GRADE SUPER COBALT DRILL BITS

From $1.65 to $6.60
Description Drill Size Approx
Length
Part Number Price Buy
SUPER COBALT DRILL #55 55 1-7/8" 12-03791 $2.25
Quantity
SUPER COBALT DRILL 51 51 2" 12-03698 $2.36
Quantity
SUPER COBALT DRILL #44 44 2-1/8" 12-03792 $1.84
Quantity
SUPER COBALT DRILL #42 (1) 42 2-1/4" 12-04212 $1.70
Quantity
SUPER COBALT DRILL #41 41 2-3/8" 12-04213 $1.70
Quantity
SUPER COBALT DRILL #33 (1) 33 2-7/16" 12-04216 $1.95
Quantity
SUPER COBALT DRILL #36 (1) 36 2-1/2" 12-04215 $1.95
Quantity
SUPER COBALT DRILL #37 37 2-1/2" 12-03793 $1.65
Quantity
SUPER COBALT DRILL #35 (1) #35 2-5/8" 12-04235 $2.08
Quantity
SUPER COBALT DRILL 1/8 1/8" 2-3/4" 12-04225 $2.51
Quantity
SUPER COBALT DRILL #40 40 2-3/4" 12-04214 $1.70
Quantity
SUPER COBALT DRILL #30 30 2-3/4" 12-04217 $2.25
Quantity
SUPER COBALT DRILL #28 (1) 28 2-15/16" 12-04218 $2.33
Quantity
SUPER COBALT DRILL #27 27 3" 12-04219 $2.64
Quantity
SUPER COBALT DRILL 5/32 (1) 5/32" 3-1/8" 12-04226 $2.45
Quantity
SUPER COBALT DRILL #23 (1) 23 3-1/8" 12-04220 $2.70
Quantity
SUPER COBALT DRILL #21 21 3-5/16" 12-14221 $2.82
Quantity
SUPER COBALT DRILL #19 19 3-5/16" 12-04221 $2.70
Quantity
SUPER COBALT DRILL 3/16 3/16" 3-1/2" 12-04227 $3.35
Quantity
SUPER COBALT DRILL #12 (1) 12 3-1/2" 12-04222 $3.75
Quantity
SUPER COBALT DRILL #10 10 3-5/8" 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 $4.60
Quantity
SUPER COBALT DRILL 5/16 (1) 5/16" 4-1/2" 12-04229 $6.60
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

Drills Great

Edward B
March 5, 2019

Akira A
February 15, 2019

The metal sheets are fine. The drills are fine. And the rivets are fine. All good, thank you.

Bob C
December 13, 2018

Advertised as long lasting. That may or may not be true. They arenât nearly as sharpe as HSS. They are far more prone to wander than cheaper HSS. Probably fine in a drill press but not a good choice for drilling aluminum, especially rivet removal.

Scott F
December 10, 2018

Great quality, good price

Tim C
August 26, 2018

Used 1 (..and ordered 10) on a PA-12 wing to remove rivets, and its still going. VERY SATISFIED!

Ryan K
April 5, 2018

Denis L
July 28, 2017

These are very high quality drill bits at a great price. I am a machinist and buy bits from a lot of different sources, but much prefer these in the sizes Spruce has available.

Brian
June 19, 2017

Love the drill bits. They are the best on the market. Just wish whoever packaged them could count. I ordered and paid for 10, but got 9. How can I prove that?

Thomas W
May 1, 2017

I ordered two #30 Bits in case one went dull. I had to drill out 96 rivets in a Cessna. No problem and I never needed the second bit. I center punched each rivet and the bit never wandered and it grabbed perfectly.

Bob
March 23, 2017

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.

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