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Product Description: 40PC Cobalt Steel Tiny Inch Drill Bits for Steel
This set includes 40 fractional inch drill bits that are specifically designed for metalworking. Each bit is crafted from premium M35 grade cobalt steel, which contains 5% cobalt—a robust steel alloy that enhances strength and heat resistance. Given the nature of small drill bits, we provide extras in each size to account for potential breakage, a common issue with smaller bits.
Key Features of the Drill Bits:
Superior Material Composition: The M35 Cobalt Steel, a combination of cobalt and steel, offers unmatched durability and heat resistance. Though cobalt bits are pricier than standard HSS drill bits, they are a worthwhile investment. Their extended lifespan significantly reduces the cost per hole drilled, making them more economical for frequent metal drilling tasks.
Optimal Drilling Performance: It's crucial to avoid drilling deeper than half the length of the bit's fluting for the best performance. Additionally, it’s recommended to refrain from using M35 cobalt bits on hardened steel, high carbon steel, or heat-treated steel.
High-Quality Craftsmanship:
Our bits are manufactured with advanced machinery and skilled workers using precision grinding techniques, ensuring a smooth hardened surface. Each bit undergoes stringent inspections with precision instruments before packing to guarantee top-tier quality.
Maximize Your Drilling Success with These Tips:
Maintain Vertical Alignment: Always keep the drill bit vertical relative to the surface you are drilling. A tilted drill increases the risk of breakage. Ensuring stability for both the bit and the workpiece is essential.
Adopt a Slow Drilling Speed: When drilling metals, use low RPM settings. Choose a drill with adjustable speeds, as a high RPM can be detrimental, especially for thicker bits. If unsure, start with the lowest speed and apply gentle pressure.
Keep It Cool: To manage heat generated by friction, use a cooling liquid while drilling. Both lubricant oil and water are effective options to prevent the bit from melting or wearing down prematurely.
Use the Right Equipment: For drilling thicker metals, a drill press is highly recommended due to its stability and adjustable RPM. If a drill press is unavailable, an electric or cordless drill can work; however, keep in mind that less experienced users may encounter difficulties.
Product Specifications:
Performance and Applications:
These drill bits excel at cutting through tough metals—such as stainless steel and cast iron—with a hardness less than HRC38°. They are also effective with softer materials like copper and aluminum. However, they should not be used for hardened steel or high carbon steel.
A downloadable user guide accompanies the product, providing effective drilling tips and an RPM chart tailored to various metals, enhancing your overall drilling experience.
Customer Feedback:
Whether you are a hobbyist or a professional seeking to optimize your metalworking tasks, this set of 40PC cobalt drill bits promises reliability and efficiency. Don’t miss the chance to elevate your drilling game!
product information:
Attribute | Value | ||||
---|---|---|---|---|---|
is_discontinued_by_manufacturer | ‎No | ||||
package_dimensions | ‎3.11 x 2.2 x 0.47 inches; 1.41 ounces | ||||
date_first_available | ‎May 1, 2019 | ||||
manufacturer | ‎Hymnorq | ||||
country_of_origin | ‎China | ||||
best_sellers_rank | #246,281 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #600 in Jobber Drill Bits | ||||
customer_reviews |
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