Internet #305287350

Model #GLBCOX125/32

5/32 in. x 12 in. Cobalt Aircraft Extension Drill Bit

  • For tough, high tensile strength materials like stainless steel
  • 135° split point tip prevents drill from walking
  • 12 in. L for drilling where extra length for reach is required
  • See More Details

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Price:
$1314

Product Overview

Drill America Cobalt Aircraft Extension Drills are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys. Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools. Drill America Aircraft Extension Drills are manufactured to National Aerospace Standard 907. The 135° split point is self-centering and reduces thrust. Sizes smaller than 1/16 have the 118° standard point. Drill America Aircraft Extension Drills are available in 6 in. and 12 in. overall lengths when extra reach is required.
  • Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
  • Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
  • Round shanks allow use with a wide variety of tool holding systems
  • Run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
  • Manufactured to National Aerospace Standard 907
  • Made of heat resistant cobalt, they are especially effective in drilling tough, high tensile strength materials like PH stainless steel, Inconel, and titanium
  • California residents

Specifications

Dimensions

Assembled Depth (in.)
12 in
Assembled Height (in.)
2 in
Assembled Width (in.)
2 in
Bit Diameter
5/32 in
Bit Length (in.)
12
Shank Diameter
5/32 in

Details

Bit Material
Cobalt
Drill Bit Type
Twist
Drill Bit Type(s) Included
Twist
Individual/Set
Individual
Material Application
Aluminum,Angle Iron,Cast Iron,Copper,Duct/Sheet Metal,Nickel,PVC,Plaster,Stainless Steel,Steel,Vinyl Flooring,Wood
Returnable
180-Day
Self-Feeding
No
Shank Style
Straight
Tools Product Type
Power Tool

Questions & Answers

0Questions0Answers

Customer Reviews

  • 4.8
    out of 38 reviews
  • 100% recommend this product
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Showing 1-10 of 38 reviews
This is an accurate bit especially for a small diameter in this length. I was most impressed that...
This is an accurate bit especially for a small diameter in this length. I was most impressed that the bit does not walk around on the material. I would not utilize this bit on 3/16 flat stock as depicted in the photos and video: however, for the sake of the review, I demonstrated this bit and it’s accuracy on some tough material. I do strongly recommend!
by BrownBuilt
When you need that extra long drill bit to go through hard materials, this is the one you need. ...
When you need that extra long drill bit to go through hard materials, this is the one you need. Although it is made for metal i have used it for a number of things including drilling through my enclosed trailer so I could add some wiring and it worked perfect. the bit is sharp and makes quick work of going though areas that you need a longer reach. The composite of the bit seems very strong and didn't bend or flex while I was drilling through the a metal frame of a desk.
by JackinNH
This cobalt steel bit easily drilled through 3/16 inch steel (ten rapidly drilled holes) with no degradation to the drill bit nor imperfections in the drilled holes. The bit comes in a protective plastic case which will minimize the chances of being damaged in one’s tool box. It is long and slender (12 inches overall, 2 ¼ inch fluted section), thus care must be taken to not apply too much pressure (to prevent “bowing”), however even with minimal drilling pressure, it made clean holes quickly and did not tend to “wander” when started without centerpunching first. With proper care this bit should exhibit a reasonably long life.
by DonK
It's difficult to write a review about a drill bit because they either work... or they don't. I r...
It's difficult to write a review about a drill bit because they either work... or they don't. I really wanted this particular size bit because of it's 12" length which makes it well suited for drilling through exterior walls. It's only 3/16" in diameter though so you have to follow it up with a larger bit if you're running anything substantial but have a pre-drilled hole means you can drill from both sides with a larger bit and meet in the middle easily. The spiral runs a about 2 5/8" down the shank. This bit is great for drilling through wood, but using it to go through steel will probably dull it in short order. Softer metals shouldn't present too much of an issue. As with all drill bit the drill diameter is engraved into the bottom end of the shank but it is a little tough to read. The only improvement I could see them making would be to machine the shank at the last inch or so, so it can be more securely gripped by the drill chuck. This came to me inside a blue plastic sleeve that I an continue to use for storage.
by
The 3/16" x 12" Colbalt Aircraft Extension drillbit works great to use when you need to drill int...
The 3/16" x 12" Colbalt Aircraft Extension drillbit works great to use when you need to drill into hard to reach areas. I use this 3/16" bit to drill pilot holes for screws. It is a high quality bit that I can drill a lot of holes in sheet metal before it needs sharping. It comes with a square plastic container to store the bit in when not being used.
by Lucky
Depending on what I need to drill through I sometimes like to drill a smaller pilot whole before I drill with the big bit. This does that for me. I also need to drill through a support beam that has a piece of ¼” plate sandwiched between the 2 x wood beams. I needed to install a dryer vent through the side of the house, I used this bit to drill a pilot hole before I used the large hole saw from the inside then outside. This handled both fine. I would recommend this for what is was designed for.
by livingthedream
This 3/16 inch diameter 12 inch cobalt aircraft extension drill bit by Drill America has more cob...
This 3/16 inch diameter 12 inch cobalt aircraft extension drill bit by Drill America has more cobalt so that it has good performance when cutting harder metals such as stainless steel or nickel alloys. It has a Gold oxide surface treatment rather than black oxide typically used, so performance is very good. It comes in a nice case (see picture). The 135° split point is self-centering and reduces thrust (see picture). It is always great to have a smaller diameter, longer length drill bit like this one when you need to pass smaller diameter wires without making a gaping hole that will need to be back-filled to prevent bug or rodent incursion. I highly recommend this drill bit!
by DickB
2 people found this helpful
I've got almost every size drill bit under sun, but very few with any length to them. It's one of...
I've got almost every size drill bit under sun, but very few with any length to them. It's one of those things, that for me at least, is rarely needed but when you do need it there is no good substitute. This seems like a very high quality bit and even visually looks much nicer than your standard high speed bit. Needing to get through 1/2 siding, 3" steel tubing, and another 5/8" plywood all sandwiched together worked out great with this bit while drilling multiple mounting holes for new latch hardware on my shed. Thumbs up.
by DstBstSN
1 person found this helpful
The drill is a full 12" long, but the cutting flutes are only about 2 1/2" long, so when you are ...
The drill is a full 12" long, but the cutting flutes are only about 2 1/2" long, so when you are deep plunging your work piece, there is no path for shavings, heat or expansion to escape. If you make very light plunges, and back out often, you can get the work done. This drill had a hard time drilling through a piece of cedar, I wonder how it would handle metal.
by CharlieW
1 person found this helpful
AWESOME drill bit! I have been needing one of these for longer than I realized. If you need to d...
AWESOME drill bit! I have been needing one of these for longer than I realized. If you need to drill a hole, in a place that you just cannot get to, this is it. The only other option is to use a drill bit extender, and they are not as convenient as having ONE long bit. I needed to drill a hole through the firewall on my car to run some accy wires, where I just could not reach, and another through the floor under the kitchen, to run a water tap for the fridge. This long bit did both with ease!
by BadgerJack
1 person found this helpful
Showing 1-10 of 38 reviews