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Big Daishowa Simultaneous Dual Contact System

Supplier: SEI Carbide Australia

High accuracy, high rigidity and economy. Simultaneous dual contact system maintaining interchangeability with existing standards.

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Tool holder repeatability when using ATC within 1 micron
The BIG-PLUS SPINDLE SYSTEM assures the highest precision location of the toolholder in the spindle when using the ATC for loading tools, as a result of the dual contact, which precisely positions the tool holder within 1 micron.
   
    
Elimination of Z-axial movement
At high rotational spindle speeds, the mouth of machine spindle can expand slightly due to centrifugal force. As the machine spindle expands, the conventional toolholder, which under constant draw bar pulling pressure, moves further into the spindle. On high tolerance applications, this slight pull back of the cutter can affect dimensional accuracy of the Z-Axis. Pull back can also cause the toolholder to get locked into the machine spindle taper. The face contact provided by the BIG-PLUS Spindle System prevents the toolholder from being drawn back into the machine spindle.
   
    
Perfect interchangeability with existing machines and toolholders
One of the most important features of the BIG-PLUS Spindle System is the interchangeability with existing toolholders and machines. Conventional toolholder can be used in BIG-PLUS machines. Alternatively, BIG-PLUS toolholders can be utilized in machines equipped with conventional spindles. The innovative design of the BIG-PLUS Spindle System allows one to gain the benefit of BIG-PLUS tooling without the need to discard existing tooling, which usually represents significant investments. Of cause, to benefit from all the technical advantages which the BIG-PLUS Spindle System offers, one must have a machining center which is equipped with the BIG-PLUS spindle and utilize BIG-PLUS toolholders. (Combination A)

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