Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS)

STROTON has a long and rich history, first established in 1990 by Carl's father-in-law, Mr. Stroton. Carl was well aware of Mr. Stroton's integrity and honesty, which led him to decide on the company name STROTON.

What makes STROTON's products unique? The company operates its own cobalt ore mine, enabling them to produce cobalt alloy products with the best performance.

Why choose STROTON products? STROTON produces a wide range of hardware products and supplies many world-class brands. Customers can purchase products that are comparable to famous global brands.

STROTON offers a variety of cobalt drill bits, including Metric Cobalt Drill Bits and SAE Cobalt Drill Bits, all of which can be found in the company's online store.

The Premium Cobalt Drill Bits from STROTON are exceptional. Compared to HSS (High-Speed Steel) without cobalt, HSS with cobalt has higher temperature resistance, red hardness, wear resistance, and better heat treatment response.

The red hardness of these drill bits means that the hardened steel can maintain its hardness at 860-880°C, resulting in 3 times the cutting ability and 3 times the durability. This drill bit set is made of True Premium Cobalt, which costs $80,000 per ton.

In contrast to "Cobalt" bits sold by other brands, which are merely coated or contain only a small amount of cobalt, this STROTON drill bit set is made of a true 5% cobalt alloy steel. The increased cobalt content provides superior heat and wear resistance, allowing the bits to hold up better.

The split-point design of these drill bits ensures they start drilling immediately with less force, eliminating "walking" across the work surface. They are ideal for a wide range of materials, including stainless steel, mild steel, iron, hard metals, aluminum, copper, plastic, and hardwood.

When using these drill bits, it is crucial to maintain a vertical position relative to the workpiece to prevent breakage. A drill press with sufficient power is recommended to make the drilling process easier.

The recommended speed range is 200 to 1000 RPM, as too high a speed may burn the bit tip. Cutting fluid, such as stainless steel tapping oil or engine oil, should be used to prevent overheating, especially when drilling stainless steel.

Patience and a steady hand are essential when using these premium cobalt drill bits. The drilling should start slowly, applying force gently until the bit begins to chip away at the material.

In summary, STROTON's Premium True 5% Cobalt Steel Drill Bits, with their 68 HRC hardness, offer 3 times the heat, wear, and chip resistance, as well as 3 times the tool life, compared to ordinary drill bits. This superior performance comes at a slightly higher cost, but the cost per hole is ultimately the lowest.

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