BIG-PLUS OVERVIEW
BIG-PLUS DUAL CONTACT
BIG-PLUS
Conventional
FIT
FIT
SIMULTANEOUS TAPER & FLANGE FIT BIG-PLUS surpasses all other spindle concepts while offering interchangeability with existing machines and tool holders. • Improved surface finish & dimensional accuracy • Extended tool life • Improvement of ATC repeatability • Elimination of Z-axial movement at high speeds • Improved roundness of boring operations
SPACE
BASIC CONCEPT The BIG-PLUS Spindle System is based on the most current available standards in ASME B5.50, JIS B6339 and DIN 69871. A conventional steep taper tool holder is supported on a reference diameter called the gage line. On the contrary, a BIG-PLUS tool holder is supported on the flange face, which brings remarkable improvement to rigidity.
Increased Contact Diameter (Example of BT50) BIG-PLUS
Conventional
Taper No.
Conventional
BIG-PLUS
2
SPACE
CONTACT
BT30
ø1.250
ø1.811
PERFECT INTERCHANGEABILITY BIG-PLUS tool holders can be used on existing standard machine spindles. Existing standard tool holders can also be used on BIG-PLUS spindles. In this case, however, simultaneous contact cannot be attained. Although other simultaneous contact systems require exclusive new accessories, BIG-PLUS tooling uses existing accessories such as a tool presetter and tool holder fixture as it is based on a conventional steep taper shank. Further, it is not necessary to modify tool magazines and ATC devices of existing machines.
BIG-PLUS Spindle + BIG-PLUS Holder CONTACT
Conventional Spindle + BIG-PLUS Holder CLEARANCE
Existing Accessories Utilized
Tool Presetter
BIG-PLUS Holder
Tooling Fixture
Conventional Holder
Tool Storage System
Powered by FlippingBook