Which design feature helps reduce chatter during reaming?

Which design feature helps reduce chatter during reaming?

• A. Flutes cut on a spiral or helix
• B. Flutes cut straight across
• C. Flutes cut at a right angle
• D. Flutes with no helical pattern

Answer: (A)

Using flutes cut on a spiral or helix helps reduce chatter because the cutting action engages the work progressively around the hole and carries chips away smoothly. This spiral engagement smooths the load on the reamer, lowers cutting forces in vibration-prone directions, and improves chip evacuation so chips don’t pack and bounce the tool. The result is a steadier cut and a finer hole finish. Flutes cut straight across, at a right angle, or with no helical pattern tend to engage more abruptly and trap chips, increasing the chance of rubbing, vibration, and chatter during reaming.

Using flutes cut on a spiral or helix helps reduce chatter because the cutting action engages the work progressively around the hole and carries chips away smoothly. This spiral engagement smooths the load on the reamer, lowers cutting forces in vibration-prone directions, and improves chip evacuation so chips don’t pack and bounce the tool. The result is a steadier cut and a finer hole finish.

Flutes cut straight across, at a right angle, or with no helical pattern tend to engage more abruptly and trap chips, increasing the chance of rubbing, vibration, and chatter during reaming.