How Does BIG-PLUS Compare To HSK? Which Is Better? HSK is a dual-contact spindle system that relies on tool holder expansion during clamping. This is achieved through very high clamping forces and a thin-walled, short-taper design that allows the holder to expand elastically during clamping. Extensive testing at BIG DAISHOWA comparing both systems found that as tool holder length increases, BIG-PLUS provides greater rigidity and stability. Also, due to the internal construction of HSK, tool overhang is longer, while BIG-PLUS has better tool holder taper engagement in the spindle. However, for high speed applications, HSK should be considered the better option.
BIG-PLUS
HSK
Tool Overhang
Is it Possible to Rebuild BIG-PLUS Spindles to Original Factory Specifications? Yes, there are several companies who specialize in spindle repair and have obtained the license and gages for BIG-PLUS. Also, these companies can convert a standard spindle to BIG-PLUS by replacing the spindle shaft during the rebuild process at their company.
Gages for Machine Spindle Master Gage
Master Arbor
Measuring Device
Do I Need to Acquire BIG-PLUS Adapters for my Tool Presetter or Tightening Fixtures? No, if your presetter is already equipped with CAT or BT adapters, BIG-PLUS tool holders will fit and measure like a standard tool holder.
Existing Accessories Utilized
Tool Presetter
BIG-PLUS Holder
Tooling Fixture
Conventional Holder
Tool Storage System
11
Powered by FlippingBook