Cobalt Drill Bit Set for Metal and Wood (1/16-1/4 Inch, 13PCS)

About STROTON

STROTON boasts a rich history, having initially been founded in 1990 by Carl's father-in-law, Mr. Stroton. Recognizing Mr. Stroton's integrity and honesty, Carl chose to name the company after him.

What Makes Our Products Unique?

One of the key differentiators for STROTON is that we have our own cobalt ore mine. This gives us the ability to produce cobalt alloy products that deliver exceptional performance.

Why Choose STROTON Products?

STROTON manufactures a wide range of hardware products and supplies many renowned global brands. When you shop with us, you can find products that rival those of the world's most famous brands.

• Metric Cobalt Drill Bits: Visit the Store
• SAE Cobalt Drill Bits: Visit the Store
• Premium Cobalt Drill Bits:

Product Description

Discover the benefits of our premium STROTON cobalt drill bits:

1. True Cobalt Steel (5% Cobalt)
2. 3X Drill Efficiency
3. Split Point Design
4. Creates Clean Holes

Why Choose Premium STROTON Cobalt Drill Bits?

Research indicates that high-speed steel (HSS) bits infused with cobalt exhibit enhanced temperature resistance, red hardness, wear resistance, and heat treatment response. “Red hardness” refers to the drill bits' ability to maintain hardness up to 860-880℃, achieving a hardness rating of 68 HRC. This means our drill bits offer three times the cutting power and durability compared to standard options.

The drill bit set is made from true premium cobalt at an impressive cost of $80,000 per ton. Unlike typical "cobalt" bits that are merely coated or contain minimal cobalt, our drill bits boast a genuine composition of 5% cobalt alloy steel. This substantial cobalt content results in superior heat and wear resistance compared to ordinary HSS, allowing for more effective and reliable drilling.

Efficiency and Durability

Our drill bits deliver 3X the drilling efficiency and lifespan. The split-point design enables immediate drilling with less force required, effectively preventing the bit from "walking" across surfaces. These bits are ideal for a variety of materials such as stainless steel, mild steel, iron, hard metal, aluminum, copper, plastic, and hardwood. They are also well-suited for mechanical maintenance tasks, including drilling out bolts and screws.

Drilling Guidelines

• Alignment: Ensure that the drill bit is held perpendicular to the workpiece to prevent breakage.
• Drilling Equipment: Using a adequately powered drill press eases the process.
• Speed Settings: RPM should range between 200 to 1000. For drill diameters:
• ≤ 3/16: RPM (1000 ~ 700)
• 3/16 - 3/8: RPM (700 ~ 350)
• 3/8 - 1/2: RPM (350 ~ 200)

Cutting Fluids

To avoid overheating stainless steel, consider using cutting fluids such as stainless steel tapping oil, engine oil, or alternatives like vinegar, soy sauce, or water.

Stay Steady and Patient

Start drilling slowly, applying gentle pressure until the bit begins to chip away material.

Final Thoughts

Our drill bits are crafted from cobalt ore sourced from our own mine, ensuring genuine cobalt content. While the cost may be slightly higher, the superior performance—including 3X heat, wear, and chip resistance—provides significant value with triple the tool life.

Product Set

Our 13-piece jobber length industrial drill bit set includes the following sizes: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, and 1/4 [in increments of 1/64 inch].

product information: