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Cobalt Double Ended Drill Bit Supplier Technical Specifications
COBALT DOUBLE-ENDED DRILL BITS
Ideal for drilling through tough metals such as light gauge stainless steel, cast iron, titanium, and other high-tensile strength materials.
135 Degree Split Point for increased drilling accuracy.
Double ended Drill Bits- identical on each end.
Fully Ground and Polished. Meet ANSI Standards.
Fantastic when drilling up to a 1/2″ hole in Hard Steel. Great for drilling pilot holes.
Decreases your drilling time in half or less over using a conventional High Speed drill bit.
#30 Double Ended High Speed (Pack of 12) – COBALT
1/8″ Double Ended High Speed (Pack of 12) – COBALT
3/16″ Double Ended High Speed (Pack of 12) – COBALT
1/4″ Double Ended High Speed (Pack of 12) – COBALT
Weight .002 lbs
Cobalt Double Ended size:
#30 Double Ended Cobalt (Pack of 12), 1/8″ Double Ended Cobalt (Pack of 12), 3/16″ Double Ended Cobalt Pack of 12), 1/4″ Double Ended Cobalt (Pack of 12)
What is a Drill Bit? 1/4″ Black Oxide Coating High Speed Steel HSS Double End Drill Bit
A drill bit is a cutting tool that’s fitted into a power drill and used to cut holes in materials. They come in a wide variety of shapes and sizes, but they all have similar parts as follows:
Point: the top, cone-shaped part of the drill bit that consists of a spur and cutting lip.
Spur: this sits at the top centre of the point. It helps to get the drill bit into position.
Cutting lip: the part of the drill bit that cuts the material. Golden Finishing HSS 135° Split Point Double Ended Drill Bit
Flutes: a spiral channel that runs from the cutting lip to the shank. It helps to remove the material as it’s cut from the hole.
Shank: this part of the drill bit slots into the drill’s chuck. There are several shank types which we will cover later in this drill bit guide.
The part that differs between drill bit types is usually the cutting lip. Their different designs make some more suited to cutting through certain materials than others. There are also different designs depending on the power drill they need to fit, and the type of hole being drilled.
What Drill Bit to Use? 5/32″ Black Oxide Finish Double-Ended HSS Drill Bit
Before buying a drill bit, it’s important to consider what you need it for. You can purchase multi-purpose drill bits, but you’ll get better results by using one specifically designed for the material and type of hole being drilled.
A drill bit’s suitability for drilling into certain materials usually depends on what the drill bit is made from and coated with. The drill bit guide below describes the main options:
Drill bit materials:
High-speed steel: made from carbon steel with chromium and vanadium additives. It’s suitable for drilling wood, plastic and soft metals. 5/32″ Black Oxide Finish Double-Ended HSS Drill Bit
Cobalt: an incredibly strong alloy metal used to drill through tough materials. It can withstand heat and resistance and is the best drill bit for stainless steel.
Carbide-tipped: one of the hardest materials on the planet, this drill bit only uses carbide on the tip. It’s suitable for drilling masonry, tiles and concrete.
Solid carbide: a drill bit as described above, but it’s made entirely from carbide. It’s suitable for drilling into tough materials. Black Oxide Coated High Speed Steel Double Ended Drilling Bit 9/64″
Tungsten carbide: made from a mix of tungsten metal and carbon. It’s even more hard-wearing than the standard carbide above. It is suitable for drilling into extremely tough materials such as masonry. Gold Finish HSS 135° Split Point Double Ended Drill Bit Black Oxide Coated High Speed Steel Double Ended Drilling Bit 9-64
Drill bit coatings:
Black oxide: this coating helps drill bits retain lubricants and prevent rust from forming.
TiN: a titanium nitrate coating that slows down wear and tear on drill bits designed to cut metal. High Speed Steel Double End Twist HSS Drill Bit 1/8″
TiAIM: a titanium aluminium nitrate coating that increases resistance to abrasion and heat on drill bits designed to cut metal.
SG: a silicone coating that helps a drill bit penetrate dense metals. Black Oxide Finish HSS 135° Split Point Double-Ended Drill Bit
| Double Ended(Metric Size) |
|
Diameter
|
Flute Length
|
Overall Length
|
Diameter
|
Flute Length
|
Overall Length
|
Diameter
|
Flute Length
|
Overall Length
|
Diameter
|
Flute Length
|
Overall Length
|
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
|
3.0
|
10
|
46
|
4.1
|
13
|
55
|
5.2
|
16
|
62
|
8.0
|
25
|
79
|
|
3.1
|
10
|
46
|
4.2
|
13
|
55
|
5.5
|
19
|
66
|
8.5
|
25
|
79
|
|
3.2
|
10
|
49
|
4.5
|
16
|
58
|
6.0
|
19
|
66
|
9.0
|
25
|
84
|
|
3.3
|
10
|
49
|
4.8
|
16
|
58
|
6.5
|
21
|
70
|
9.5
|
25
|
84
|
|
3.5
|
13
|
52
|
5.0
|
16
|
62
|
7.0
|
23
|
74
|
10.0
|
25
|
89
|
|
4.0
|
13
|
55
|
5.1
|
16
|
62
|
7.5
|
23
|
74
|
|
|
|
|
|
| Double Ended(Inch Size) |
|
Diameter
|
Flute Length
|
Overall Length
|
Diameter
|
Flute Length
|
Overall Length
|
Diameter
|
Flute Length
|
Overall Length
|
Diameter
|
Flute Length
|
Overall Length
|
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
inch
|
|
3/32″
|
9/16″
|
1-3/4″
|
9/64″
|
5/8″
|
2″
|
7/32″
|
11/16″
|
2-3/8″
|
11#
|
11/16″
|
2-1/4″
|
|
7/64″
|
5/8″
|
1-7/8″
|
5/32″
|
5/8″
|
2-1/16″
|
1/4″
|
7/8″
|
2-1/2″
|
20#
|
5/8″
|
2-1/8″
|
|
1/8″
|
5/8″
|
2″
|
3/16″
|
5/8″
|
2-13/16″
|
10#
|
11/16″
|
2-1/4”
|
30#
|
5/8″
|
2″
|
