Metric M42 8% Cobalt Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)

STROTON Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)

Why choose STROTON cobalt drill bits?

Research shows that drills made with cobalt-infused high-speed steel (HSS) have higher temperature resistance and red hardness, greater wear resistance, and a better response to heat treatment compared to drills without cobalt. Red hardness allows the drill to maintain its hardness at temperatures around 860-880℃, while higher tempering resistance helps maintain high hardness at elevated temperatures for longer periods of time. The drill bits in this set are made of premium cobalt, which costs $80,000 per ton. With its M42 Cobalt 8% alloy, it outperforms generic high-speed steel by providing superior heat and wear resistance.

3 Steps Design for Improved Drilling Efficiency

The 3 steps design allows for immediate drilling with less force and eliminates "walking" across the work surface. This makes it ideal for drilling stainless steel, hard metals, hardwood, aluminum, copper, plastic, and more. The accurately centered design is particularly useful for precision woodworking jobs. Additionally, the cobalt content enhances its performance in hardwood drilling.

Proper Usage and Drill Speed Control

To prevent the drill bit from breaking, it is important to ensure that the drill bit is perpendicular to the workpiece. Using a drill press with sufficient power can make drilling easier. Avoid using the drill bit on a percussion drill, as it is not designed for such use. When drilling holes on stainless steel, it is recommended to control the drill speed between 200 and 1000 RPM. Using a high RPM does not improve drilling efficiency, but rather increases heat between the bit and the workpiece, which could soften the bit and harden the workpiece. For longer-lasting performance, cutting fluid should be used.

Product Variants

• Metric M42 drill bits (1-10mm/19pcs)
• 17pcs cobalt drill bits set (1/16"-1/2")
• 21pcs cobalt drill bits set (1/16"-3/8")
• Metric 5% Cobalt Step Drill Bits (4-32mm/15 Steps) (1/16"-1/4")
• 13pcs cobalt drill bits set (Metric M42 8% Cobalt)
• Each specification comes in independent packaging for ease of use.

Customer Reviews and Pricing

The product has received positive reviews from 3,536 customers, with an average rating of 4.4 out of 5 stars. The price ranges from $10.89 to $36.89, depending on the set chosen. The measurements are provided in both metric and SAE (inch size) systems, catering to different user preferences.

In summary, STROTON Metric M42 8% Cobalt Twist Drill Bits deliver superior performance in drilling stainless steel, hard metals, aluminum, plastic, and hardwood. With their 3 steps design and cobalt-infused construction, they offer improved drilling efficiency, longevity, and value for money.

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