The ____ knob is gripped by a power-actuated drawbar mechanism in the machine spindle to secure the mating tapers.
A) BT
B) chuck
C) retention
D) collet

Question

Quizplus · Accepted Answer

The retention knob is responsible for securing the tool holder or tooling onto the spindle of a CNC machine. This is done by a power-actuated drawbar mechanism that tightens the retention knob, causing it to grip onto the mating tapers in the spindle. Choice A, BT, refers to a specific type of taper used in tooling and does not relate to the knob. Choice B, chuck, is a separate component used for holding a workpiece in the machine. Choice D, collet, is another type of tool holder that functions differently than the retention knob.

The ____ Knob Is Gripped by a Power-Actuated Drawbar Mechanism