Titanium nitride coating is a robust coating that shields the spade from corrosion, while titanium aluminum nitride coating provides protection at even higher performance levels. These coatings increase the durability of the drill bit, making it more effective for tougher drilling tasks. Spade drill bits are often coated with two types of materials – titanium nitride and titanium aluminum nitride. In addition to their design, spade drill bits can also be coated to enhance their performance and durability. The design of spade drill bits allows for fast and efficient drilling, making them a popular choice for metalworkers. Design FeaturesĪ spade drill bit is characterized by a flat surface with a sharp-edged center point and two lips and spurs to facilitate cutting and drilling through the material. The primary advantage here is the ability of the standard spade drill to accept a wide range of different diameter inserts instead of the “one tool–one diameter” requirement of indexable insert drills. There is also a benefit to replacing indexable insert drills with spade drills. With spade drills, because only the insert cuts metal, the tool holder can be made from less expensive steel, providing another economic advantage to using them. Special multidiameter brazed carbide drills can also be replaced economically with spade drill holders fitted with throw-away inserts. No regrinding is necessary, further reducing cost. When the insert edge wears out, it easily can be replaced on the machine, or, with indexable spade drills, the second edge simply is indexed into place. The common brazed type of carbide drill can also be successfully replaced by “off-the-shelf” spade drill holders fitted with standard, replaceable carbide inserts. The alternative is to stock drills for every diameter, a costly proposition and one which results in a sizable tool inventory. A series of basic, rigid holders is used with several insert sizes to provide this wide range of diameters. Spade drills can be used in virtually any application where a traditional drill can be used to cut holes generally ranging from 1/2 to 4 inches in diameter. These handy tools have a flat cutting edge and a pointed tip that can create clean and precise holes. They are the ideal tools for drilling perpendicular holes. Spade drill bits or spade drills are specially designed for drilling precise holes in metals. Twist drills & hole saws may be better suited to some materials.Use proper techniques, chip removal processes, and maintenance tips to ensure successful results with spade drills.Consider material compatibility and whether carbide-tipped spades are necessary to select the right spade bit.Spade drill bits can drill precise holes in metals while offering a wide range of diameters.Let’s embark on a journey to enhance your drilling skills and make your projects more efficient and professional. Dive into the world of spade drill bits, and explore their design, usage, and maintenance techniques. These versatile tools can save time and effort while providing clean, precise holes in various materials. Mastering the use of spade drill bits is essential for any CNC Machinist.
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