2×7216

2×7216 refers to a specific type of drill bit, commonly used in woodworking and metalworking applications. The "2×" designation indicates a two-flute cutting edge, designed for efficient material removal and chip clearance. The "7216" is likely a manufacturer's specific designation for the bit's geometry, material, or intended application, though without further context from a specific manufacturer, its exact meaning remains proprietary.

These bits are typically characterized by their helical flutes, which spiral around the shaft. This helical design helps to evacuate chips from the drilled hole, preventing clogging and allowing for faster drilling. The number of flutes influences the cutting action. A two-flute bit generally cuts faster than a bit with more flutes, making it suitable for general-purpose drilling where speed is a consideration. However, bits with more flutes might offer a smoother finish.

The material from which a 2×7216 bit is made is crucial for its performance and durability. Common materials include High-Speed Steel (HSS), which is a standard for general-purpose cutting tools, and carbide, which is harder and more wear-resistant, suitable for drilling harder materials. The specific type of point grind, such as a standard 118-degree point or a sharper 135-degree point, also affects its suitability for different materials and drilling tasks. The "7216" identifier could potentially relate to specific coatings applied to the bit, such as titanium nitride (TiN) or cobalt, which enhance hardness, reduce friction, and extend tool life.