Characteristics of drill bits
Drill Bits Wholesale Suppliers drill bit geometry has several standard aspects: spiral, sharp corner, lip corner

Spiral drill bit

Helix (sometimes called twist rate) is the steepness of the groove spiraling along the edge of the bit. If this is steep, the drill will tend to cut faster (per revolution). This is called "long slot". It usually uses a lower spindle speed. A "compact flute" is a flatter spiral that produces more grooved rings along the length of the drill bit. This tends to cut slower (per revolution) and use a higher spindle speed. This is usually used when the material being drilled is prone to wear on the drill bit or block the hole. Aluminum and copper are common examples.

Point corner

This is the angle of the tip edge. This affects the way the drill bit cuts certain materials. Softer materials require sharper corners (darker corners tend to slide along the surface and cannot bite the material). Harder materials require larger sharp corners, because larger angles bite into the material and can better withstand the higher impact and resistance of harder materials. When used with harder materials, the sharper corners tend to become dull, or they may bite in and restrain the drill bit-which may damage the tip or shaft.

Lip corner

This is the angle of the wedge at the back of the cutting edge. A larger lip angle will bite deeper (and therefore faster) into the material by rotating, resulting in a more aggressive cut under a given pressure. For a given amount of pressure, a smaller lip angle will produce a less aggressive cut. The point angle will determine the appropriate amount of lip angle required. Sharp corners require a larger lip angle to ensure sufficient coil surface area. Flat drills have a smaller surface area and are therefore more sensitive to changes in the lip angle.
For more product related information, please click: cutting tools wholesale