R S P I N D L E DUAL S Y S T E M CONTACT BIG.PLUS Standard FIT FIT BBT Shank BDV Shank BIG-PLUS surpasses all other spindle concepts while offering interchangeability with existing machines and toolholders. SPACE A1 B1 Improved surface finish & dimensional accuracy Improvement of ATC repeatability Extended tool life Elimination of Z-axial movement at high speeds Prevention of fretting corrosion caused by heavy cutting Improved roundness of boring operation Basic Concept A conventional steep taper toolholder is supported on a reference diameter called the gauge face. On the contrary, a BIG-PLUS toolholder is supported on the flange face, which brings remarkable improvement to rigidity. BT50 BT40 BT30 BT50 CONTACT S PLU BIG- BIG-PLUS ø69.85 ø44.45 ø31.75 ø100 ø 63 ø 46 AL TION VEN CON SPACE ø CONVENTIONAL INCREASED CONTACT DIAMETER (Example of BT) ø The BIG-PLUS Spindle System is based on the most current available standards in JIS B6339 and DIN 69871. Perfect Interchangeability BIG-PLUS toolholders can be used on existing standard machine spindles. Existing standard toolholders can also be used on BIG-PLUS spindles. In this case, simultaneous contact cannot be attained. BIG-PLUS SPINDLE + BIG-PLUS HOLDER CONTACT CONVENTIONAL SPINDLE + BIG-PLUS HOLDER Although other simultaneous contact systems require exclusive new accessories, the BIG-PLUS Spindle uses existing accessories such as a presetter and toolholder 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. EXISTING ACCESSORIES UTILIZED Clearance PRESETTER BIG-PLUS HOLDER TOOLING FIXTURE CONVENTIONAL HOLDER 1 TOOL STORAGE SYSTEM

Improvement of ATC Repeatability The BIG-PLUS 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 toolholder within 1 micron. ATC REPEATABILITY in With 1µm 150 ISO40 10 8 6 4 2 0 TEST BAR PULLING FORCE (ZERO RUNOUT) 800kg 1 2 3 4 5 6 7 8 9 NO. OF TIMES OF ATC 10 Taper Contact (Conventional) Dual Contact (BIG-PLUS) Note: Horizontal machine (4 years old) was used for the test. Minimized Deflection For Maximum Machining Accuracy & Superior Finish With BIG-PLUS simultaneous...

Selected materials and strict control of dimensional accuracy for the optimum quality. Wide range of standard holders to meet all production requirements. HSK form A HSK form E HSK form F C1 C40 C45 Premium Material Selection Drive Key Form Since HSK is a hollow taper shank, the material has a critical role for optimum performance. BIG uses carefully selected high grade alloy steels. Particularly, BIG uses die steel materials for HSK 40 and smaller where the cross section of shank taper is very thin. HSK Shanks according to Form A are designed to carry out torque transmission by the round shaped...

For High Speeds R World's original BBT Shank BDV Shank Wide variety of collets and chuck bodies to cover all hight speed ultra precision machining applications. A1 B1 BIG PLUS HSK Shank C1 CYLINDRICAL D1 Shank BIG COROMANT CAPTO Shank E30 STANDARD Precision ground and balanced for high speed machining Notch-free design MEGA NUT prevents vibration and reduces noise MEGA CHUCKs are micro mirror ground finished on all surfaces to assure perfect concentricity for high speed machining. The drive keyway is machined after heat treatment. Vibration at high speeds is eliminated with the use of notch free...

High precision collet chuck system R 0.1mm increments for higher precision Clamping Range: ø0.45 - ø6.05 Extremely slim design of body and nut provides superior balance and concentricity and is ideal for reaching into confined areas. BBT Shank BDV Shank MAX. 50,000 A1 B1 min-1 HSK Shank C1 CYLINDRICAL D1 BIG PLUS Shank BIG COROMANT CAPTO Shank E30 For N/C LATHE F4 Endmilling Drilling Reamer 3Stype 4Stype 6Stype Nut diameter 10, 12 & 14mm Extremely slim design Slim design avoids interference. Ideal for small mold making combining high speed and high precision capability. ø10mm Full scale STANDARD...

High precision collet chuck system R Clamping Range: ø0.25 - ø20 High speed design, offered in six different size collet series, utilizes ultra precision New Baby Collets which guarantee a runout at the collet nose of less than 1 micron. MAX. BBT Shank BDV Shank 40,000 A3 B2 min-1 BIG PLUS HSK Shank C3 CYLINDRICAL D2 Shank BIG COROMANT CAPTO Shank E31 Endmilling Drilling Reamer STANDARD High precision collet, close to submicron High Within 1m precision NBC Collet 2 way coolant supply 100% inspection to guarantee accuracy. Material, production, heat treatment... everything is selected for precision....

High precision collet chuck system R Clamping range: ø3.0 - ø12 Collet chuck designed exclusively for endmilling up to ø12mm with high concentricity & rigidity. MAX. 40,000 min-1 BBT Shank BDV Shank HSK Shank BIG COROMANT A6 B4 BIG PLUS C7 CAPTO Shank E34 Endmilling Drilling Reamer STANDARD High concentricity High grip collet Gripping force is an important element for endmilling with a collet chuck. The long gripping length of the collet in the MEGA E series provides a powerful gripping force. The shallower taper of the collet improves Extended clamping concentricity in order area to achieve...

High rigidity design for heavy cutting R solid l for Idea achines m Clamping range: ø16 - ø50 Flange contacting nut and simultaneous taper & flange contact assure highest rigidity. MAX. 30,000 min-1 BBT Shank BDV Shank HSK Shank BIG COROMANT A9 B5 BIG PLUS C9 CAPTO Shank E37 Endmilling Drilling Reamer Stabilizing contact between flange & nut provides exceptional rigidity The expanded contact diameter of the nut of the MEGA DOUBLE POWER CHUCK to the flange provides the highest rigidity as if the chuck and nut were one solid piece. This superior rigidity assures heavier duty machining without chatter....