Center Drills

YAMAWA center drills realize a good combination between chip flow at drill portion and that at countersink portion. Their flutes can fully accommodate chips and work well to eject the chips.

Kinds and features

Joint Tools

Depending on cutting condition, the cutting edges of different kinds can be attached to a same tool holder.

  • Special threads are used to strengthen the fastening force.
  • A cone face newly attached ensures high precision of run-out tolerance.
  • By strengthening the fastening force, our Joint Tools guarantee high toughness.

Center Drills

YAMAWA center drills realize a good combination between chip flow at drill portion and that at countersink portion. Their flutes can fully accommodate chips and work well to eject the chips.

  • YAMAWA center drills have the cutting edges on both ends, and have spiral flutes.
  • Owing to good chip ejection, such troubles become less as the tools break due to chip clogging.
  • Considering drill strength, we have minimized the drill length. Further to compensate the weakness at connecting point between drill and countersink, the connecting point has R which radius is within the back-taper of the drill. They also have a wide line-up.
High spiral flutes
Rather sticky materials, particularly soft materials
Low spiral flutes
Particularly when the center hole requires high precision, or when the material is rather hard.
90°drill
Both positioning and countersinking are simultaneously done during drilling. Countersinking after drilling hole.
Long shank
Drills suitable for NC machines and MC. They have 2 series in overall lenth, 100mm long and 150 mm long.
TiN coating
good anti-wear feature

Please verify product search or catalog for more information.