drill bit

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drill bit

The pointed part of a drill that bores a hole into the surface or material being drilled. I think we'll need a different size drill bit to make a bigger hole in this wood.

See also: bit, drill

References in periodicals archive ?

Next, the displacement value [u.sub.f] during unloading can be obtained via the equation of motion for a drill-bit (9), as shown in (18).

The fastest response of r was observed for underdamped drill-bit motion.

The damping conditions for the damping ratios and a from the drill-bit equations of motion (7-9) are as follows:

Next, we examine the case where [tau] is complete and the loading effect is sustained owing to external forces and drill-bit inertia.

Optimal Design Parameters of a Percussive Drilling System for Efficiency Improvement

The drill bit is part of the Brownells tap & drill kit #2, which list the drill-bit composition as HSS.

Broken drill removal

the determination of the likely penetration rate of the drill as well as the drill-steel and drill-bit consumption is of enormous interest to both miners and manufacturers of drilling equipment.

In addition, the force-penetration test can be used to make a simple estimate of how drill-bit wear affects drilling.

Percussion drilling: how to optimize drill system economy using energy efficiency concepts

There are however many variations in the design of drill-bits, and the bit selected for a particular application will depend on the type of formation to be drilled.