Tool balance has been pursued throughout all stages from design to manufacturing processes. The max. spindle speed required by each series has been achieved.

In 1996, as a pioneer of the high speed era, BIG DAISHOWA announced a new type of clamping nut that does not require wrench application. These nuts offer superior balance, and eliminate vibration during high speed rotation.

This ideal nut design not only reduces whistling noise and splattering coolant, but also assures increased strength of the nut itself.

Materials, production methods, heat treatment and more factors,  everything is selected for precision. All collets undergo an accuracy inspection twice for strict quality control.

The unique Mega Wrench has a one way clutch system which is capable of evenly applying force to the entire nut periphery for safe and secure tightening. Furthermore, the ratchet function offers outstanding workability and reduces the burden of nut tightening work.

For Micro Drills and Ultra-Fine Endmills
Clamping Range: ø0.45 - ø8.05

Ultra-slim design of ø10mm nut diameter minimizes interference with the jig and workpiece.

For Carbide Drills, Reamers and Finishing Endmills
Clamping Range: ø0.25 - ø25.4

Ideal length and diameter of holder is the key to precision machining. Select the optimum from the wide range available.

For Roughing and Finishing Endmills
Clamping Range: ø3 - ø12

A collet chuck holder for endmilling that makes both high speed and powerful endmilling possible.

For Heavy Cut Endmilling
Clamping Range: ø16 - ø50

The evolved Milling Chuck, equal to integration with machine spindle.

Tool Non-Pullout Mechanism Built-in
Clamping Range: ø16 - ø32

No slip, no pullout.

The absolutely reliable milling chuck.

For machining difficult-to-cut materials such as titanium or Inconel.