Hitachi

Completely non-step to ultra-deep (L/D=30) holes!! NSB specially shaped grooves enable quick chip discharge!

Suppression of stress corrosion cracking in the cooling hole of the mold.
Stress corrosion cracking may occur around the corner of the cooling hole or scratches on the hole wall surface in die casting or plastics molds.
By using a carbide drill for SR machining, it is possible to round the hole bottom and to reduce scratches on thehole wall, thereby suppressing stress corrosion cracking and extending the life of the molds.

Special flute shape provides high-efficient machining!
Employs SD (S-DLC) coating with excellent adhesion resistance.

Carbide Miniature Drill with Oil Hole
MINIATURE DRILL WHMB drills small-diameter holes with high efficiency and high accuracy

Carbide Step Borer
Carbide step drill for drilling and chamfering can be performed in one process!!

Achieves high-performance drilling of high-hardened steels.
High toughness and cutting edge strength for high-hardened steels.
Smooth removal of chips by special flute shape.

High-efficient machining of cast iron with long tool life.
Remarkably high performance for boring in cast iron.
Machining with high efficiency and long tool life reduces machining costs. Ideal for environmentally friendly MQL (mist) machining!

Enables ultra-deep drilling of minute holes

New chip-removal stopper technology + high-rigidity neck shape enables high-accuracy drilling of minute holes.
Thinning flute shape achieves even higher machining accuracy (Thinning: Drill diameter > φ0.1)
Combined with a special starter, it enables stable deep drilling of minute holes.
Two types of coating to match various applications