Is cobalt good for drill bits?
Cobalt drill bits are incredibly strong. Cobalt bits are able to cut through the most hardened metals, including bronze, cast iron, stainless steel and titanium. They are also able to cut through weld seams. The cutting edge on a good quality cobalt bit should last for longer than a standard HSS bit.
What is the difference between M35 and M42 cobalt drill bits?
Cobalt drill bits consist of steel with a small percentage of cobalt—the higher the percentage of cobalt, the more heat-resistant and durable. An M35 grade cobalt bit contains 5 percent cobalt, while an M42 grade cobalt bit contains 8 percent. The higher the grade, the more expensive the bit.
Who makes cobalt drills?
Hard-Core M42 Alloy Cobalt Drill Bits Bosch Cobalt M42 Metal Drill Bits are engineered with an upgraded M42 alloy, containing 8% cobalt. These hard-core cobalt bits deliver 10X life vs. standard bits and are designed for high heat resistance.
How much does a cobalt drill set cost?
DEWALT Cobalt Drill Bit Set with Pilot Point, 14-Piece (DWA1240)
| List Price: | $39.53 Details |
|---|---|
| You Save: | $9.55 (24%) |
Will cobalt drill hardened steel?
DRILL BIT MATERIALS Cobalt (HSCO) is considered an upgrade from HSS because it includes 5-8% Cobalt blended into the base material. This is a great option for drilling into harder steel as well as stainless steel grades.
What drill bits are harder than cobalt?
They last much longer than regular HSS drill bits, and they are good for cutting through any metal, including metal sheeting. Titanium drill bits are harder than cobalt, but because they are coated, they can’t be sharpened. Cobalt drill bits are made of cobalt steel, and they can be sharpened.
Is M42 harder than M35?
An M35 (5% cobalt) drill bit will drill the majority of metals most people will need to drill. An M42 (8% cobalt) drill bit will drill harder metals however will also be more prone to breakage due to its inceased brittleness.
What does M42 cobalt mean?
M42 is a molybdenum series high-speed steel alloy with an additional 8 or 10 percent cobalt. It is widely used in metal manufacturing industries because of its superior red hardness as compared to more conventional high-speed steels.
How do you sharpen a cobalt drill bit?
Tighten your hold on the drill bit and bring it toward the grinder. Hold the bit at a 60-degree angle and lightly touch the grinder with the sloped side of the conical top. Pull the bit away from the grinding wheel for a moment, and then repeat the sharpening process. Continue sharpening the sides of the conical top.
What is M42 cobalt drill bits?
Bosch Cobalt M42 Metal Drill Bits are engineered with upgraded M42 alloy, containing 8% cobalt. These cobalt drill bits provide superior performance in stainless steel and can be used to drill cast iron, titanium and other hard or abrasive metals.
What drill bits are best for hardened steel?
Clearly the best drill bits for hardened metal or steel come with a cobalt blend. These cobalt drill bits use an alloy including 5%–8% cobalt. This cobalt makes up part of the steel blend, so the hardness of the bit doesn’t wear off with a coating (like titanium bits).