The proper amount of lip clearance is determined by the point angle. Both conditions can cause binding, wear, and eventual catastrophic failure of the tool. A greater lip angle will cause the bit to cut more aggressively under the same amount of point pressure as a bit with a smaller lip angle. The lip angle determines the amount of support provided to the cutting edge.The correct point angle for the hardness of the material influences wandering, chatter, hole shape, and wear rate. Harder materials require a larger point angle, and softer materials require a sharper angle. The point angle, or the angle formed at the tip of the bit, is determined by the material the bit will be operating in.Low spiral (low twist rate or "elongated flute") drill bits are used in cutting applications where high cutting speeds are traditionally used, and where the material has a tendency to gall on the bit or otherwise clog the hole, such as aluminum or copper. A fast spiral (high twist rate or "compact flute") drill bit is used in high feed rate applications under low spindle speeds, where removal of a large volume of chips is required. The spiral (or rate of twist) in the drill bit controls the rate of chip removal.Always check the depth of the hole before drilling.Drill geometry has several characteristics:.Make sure the workpiece is securely clamped or held in place before drilling. Do not use a damaged or dull bit, as it can cause the bit to break or create an uneven hole. Before using the bit, inspect it for any damage or defects.The drill can generate debris and noise that can cause eye and ear damage. Always wear eye protection and earplugs or earmuffs when using a step drill bit.Safety Precautions of Using a Step Drill Bit Cobalt and titanium-coated bits are also excellent options, providing more strength and resistance to heat and corrosion. High-speed steel (HSS) bits are popular for their durability and resistance to wear and tear. The material of the step drill bit can affect its durability, strength, and lifespan. Understand the process by which the manufacturer creates their bits to ensure you get consistent performance from batch to batch. Look for built-in depth stop collars that prevent over-drilling and ensure accurate depth setting every time. PerformanceĬheck for features like tungsten carbide cutters that offer superior cutting performance on various materials. Also, find a drill bit that can easily be cut through hard materials such as cast iron, aluminum, stainless steel, etc. The ability to quickly adjust from hole size to hole size can save time and effort, resulting in a more efficient workflow. VersatilityĬhoose a step drill bit that can accommodate multiple drilling applications with different sizes and materials. The design should make it easy to adjust speeds and depths without stopping your drilling process or readjusting your grip. Ease of useĬonsider the ease of use of the drill bit, such as its ergonomic design, handle grip, and adjustable speed/depth settings. These coatings extend the life of the tools by improving corrosion resistance. Some drill bits feature specialized coatings that increase lubricity while drilling, resulting in better hole quality and less friction heat-up. Look for bits made from high-grade steel and features like split points and titanium-nitride coating for durability and reliability. Things To Consider Before Buying a Step Drill Bit Quality It’s important to remember that investing in a high-quality step drill bit can save you money in the long run by lasting longer and providing more precise and efficient drilling. Cheaper options can range from $5 to $20, while more expensive options can cost up to $100 or more. The cost can vary significantly depending on the brand, size, and quality. This buyer’s guide outlines all the details you need to know to make an informed decision. You must consider several necessary factors when choosing a step drill bit for your application.
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