Ultimate tool balance	Notch-free design MEGA NUT (PAT.) prevents vibration and reduces noise
Tool balance has been pursued throughout all stages from design to manufacturing processes. The max. spindle speed required by each series has been achieved. Highly balanced design Thoroughly polished periphery Balance inspection using a highprecision dynamic balancer	In 1996, as a pioneer of the high speed era, BIG announced a new type of clamping nut that does not require wrench application. These nutsoffer 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.
Strict quality control from manufacturing to shipping	Mega Wrench makes nut fastening work easier
Serial number is laser-marked on each Mega Chuck. Production history is stored for use under 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 – MEGA MICRO CHUCK PAT.

• Ultra-slim design of ø10mm nut diameter minimizes interference with the jig and workpiece.
• Clamping Range: ø0.45 – ø8.05
• Max. 60,000min^-1

Extremely slim design with ø10mm nut diameter (3S type)	Collet accuracy: Within 1μm at nose
Slim design avoids interference. Ideal for small mold making combining high speed and high precision.	Unique and compact design of taper and cylindrical guide achieves stable accuracy within 1μm at nose.
Slim design to reduce workpiece interference	2 way coolant supply
“Straight Type�?for minimal interference and “Rigid Taper Type�?for increased rigidity are available.	Select a coolant nut suitable for the lubrication method.

Video:

For Carbide Drills, Reamers and Finishing Endmills – MEGA NEW BABY CHUCK PAT.

• Clamping Range: ø0.25 – ø25.4
• Max. 50,000min^-1
• Makes high speed machining possible in addition to its high accuracy and versatility.
• MEGA25N series added with maximum clamping diameter of ø25.4.

VIDEO:

For Roughing and Finishing Endmills – MEGA E CHUCK 

• A collet chuck holder for endmilling that makes both high speed and powerful endmilling possible.
• Clamping Range: ø3.0 – ø12
• Max. 45,000min^-1

Collet designed for heavy duty gripping force	2 way coolant supply
The shallower taper and long tool shank clamping length of the MEGA E Collet improve concentricity and gripping force in order to achieve better surface finishes and stable clamping performance.	A coolant nut with an oil sealing function. Removing the internal PS Ring allows jet-through coolant supply.
Substantial body eliminates chatter
The chuck body is designed to be thicker in order to prevent chatter and deflection of the work surface during endmilling. Tapered body enhances damping effect by varying vibration frequency.

VIDEO:

For Heavy Cutting and Endmills – MEGA DOUBLE POWER CHUCK

• The evolved Milling Chuck, equal to integration with machine spindle.
• Clamping Range: ø16 – ø50
• Max. 30,000min^-1

Complete fit of nut and body	Secure coolant supply
Tightening the nut achieves dual contact between the body and end surface of the nut. This superior rigidity assures heavier duty machining without chatter. Rigidity increased by 1.4 times combined with dual contact.	Two types are individually designed for the most effective coolant supply.High accuracy straight collet with runout suppressed to a minimum. Select in accordance with the coolant usage.

VIDEO:

» Download Catalog

• Clamping Range: ø12 – ø50.8
• NEW Hi-POWER MILLING CHUCK combines the high accuracy with high torque capability and rigidity.
• Highly rigid chuck for resistance against chatter.
• BBT/BT – BDV/DV – HSK – BIGCAPTO

Video: 

Tool Non-Pullout mechanism built-in MEGA Perfect GRIP PAT

High Performance, Heavy-Duty Anti-Pullout Milling chuck for Heat Resistant Super Alloys (HRSA)

• Clamping Range: ø16 – ø32
• No slip, no pullout. The absolutely reliable milling chuck.
• For machining difficult-to-cut materials such as titanium or Inconel.
• Accepts industry standard Weldon flat cutters.
• Jet-through coolant is available.

The unique Key Grip locking mechanism prevents the tool from slipping or pulling out during heavy machining
Simple and easy handling with secure clamping (1) Place the Key Grip onto the flat part of the endmill. (2) Set the spring into the bore of chuck, then insert the endmill in alignment with the groove. (3) Rotate the endmill and set the stopper pin. (4) Clamp the tool until the nut contacts to the chuck body completely	Non-Pullout mechanism The Key Grip engages in the groove of the chuck body to ensure no tool pullout. Non-Slip Mechanism The Key Grip maintains contact with the Stopper Pin to prevent any slip.
Complete fit of nut and body	Flood jet through coolant
Tightening the nut achieves dual contact between the nut and body for rigidity close to that of an integral cutter.	A sufficient volume of jet-through coolant is ejected from vents in three locations.

• Clamping Range: Ø0.25-Ø20.
• NEW BABY CHUCK is capable of achieving high spindle speeds as required for drilling and end milling with smaller diameter cutting tools.
• The perfect tool to use in drilling, endmilling, reaming and tapping.

High-precision collet equal to the sub-micron level	New Baby Nut ensures high accuracy
The BIG New Baby Collet uses know-how cultivated through years of experience to produce a world top-class high-precision collet subjected to two complete strict quality management inspections, covering everything from material and machining methods to heat treatment.	The double effect of precision threads finished after heat treatment and the smooth tightening of the thrust balls without torsion on the collet achieves stable high-precision collet tightening. Furthermore, the mechanism acts to prevent the thrust ball from jumping out due to centrifugal force generated by high speed rotation, promising stable machining.
Coolant method to suit the application
The sealing functionality of the PERFECT SEAL means that the higher the coolant pressure is, the tighter the PS Ring adheres to the tool shank, increasing the sealing effect. The secure sealing function allows coolant to be securely supplied to the tip for high-pressure machining in high-speed applications. A sealing nut is used with a standard collet.	A coolant nut with oil sealing functionality. Removing the internal PS Ring allows jet-through coolant supply.

Over 270 shank styles are available

High precision collet chuck system MEGA ER GRIP

• Clamping Range: Ø1.9-Ø20.
• High precision collet, nut and body that outperforms standard ER systems.
• Reliable and stable runout accuracy will also tremendously contribute to improving machining capability and cost reduction.

Internal structure with increased accuracy and rigidity	Runout accuracy within 3μm
The integrated structure of the body and clamp sleeve gives greater rigidity and achieves better accuracy compared to the traditional two-part construction sealed with O-rings. 2-point tightening with dual hydraulic chambers and a short overhang area where the tool is not clamped give improved runout accuracy.	High precision runout accuracy within 3μm at 4D. High runout accuracy improves the workpiece surface finish and extends tool life.High precision runout accuracy within 3μm (center alignment repeatability within 1.5μm)
	Easy to attach and remove with one wrench The cutting tool can be clamped or unclamped easily and securely with just one wrench.
	Complete sealing mechanism prevents oil-leaks Specially selected material and shape of the hydraulic plunger seal prevents leakage of oil and decrease in gripping force. The complete seal design avoids minute cutting particles of graphite or ceramics from entering into the toolholder. This enables usage on tool grinding machines.

Abundant lineup in length and clamping diameter.
Meets diverse machining applications.

VIDEO:

Super Slim Type PAT

• Slim design eliminates interference.
• Ideal for high precision 5 axis machining.
• Tip diameter Min. ø14mm
• Max. 60,000min^-1 (HSK-E25)

HSK-E25/E32/E40/E50/F63 Series	Super Slim UP Series
Ultra-compact and high precision. Hydraulic chuck suitable for small machining centers. Prebalancing 0.5g·mm or less (HSK-E25)	Amazing runout accuracy within 1μm at 4D. The ultimate precision hydraulic chuck. HSK-E25/E32/E40 Type

VIDEO:

Jet Through Type PAT.

• Securely supplies coolant or oil mist to the tool periphery.
• Delivers outstanding results with high accuracy finishing in 5-axis machines
• Tip diameter Min. ø20mm
• Max. 35,000min^-1

• Diameter : φ1 – φ880
• Operation only by allen key
• BBT �?BT �?DV �?IV �?HSK �?BIG CAPTO

FOR ROUGH BORING

SW BORING HEAD PAT. Balanced & stepped cutting available Diameter: ø20 – ø203 Quick diameter adjustment with 1 wrench	RW BORING HEAD Rigid balanced cutting is available Diameter: ø25 – ø150 Priority is given for unique and multi-functional uses.
MW BORING HEAD PAT. Achieves high efficiency small diameter rough boring with 2 inserts. Diameter: ø16 – ø21	TW200 BORING HEAD Diameter: ø200 – ø830 Introduction of high speed to large diameter boring!

VIDEO:

FOR FINISH BORING

EWN BORING HEAD Diameter: ø20 – ø203 Back boring is available to optimise opposing bore concentricity	EWE DIGITAL BORING HEAD Diameter: ø41 – ø203 Digital display allows the adjustment amount to be read at a glance
EWB BORING HEAD Diameter: ø32 – ø105/ø100 – ø203 Automatic imbalance compensation design	EWN200 Diameter: ø200 – ø880 Finish boring head offers high precision adjustment of 1 div. = 0.01mm/φ and back boring capability.

FOR FINISH BORING (Cylindrical Toolholder Type)

SMART DAMPER EWN HEAD Diameter: ø1 – ø54 Combination with carbide cylindrical toolholder for reliable deep hole boring	EWB BORING HEAD – High Speed Diameter: ø1 – ø50 Fine adjustment for diameter by 5 micron/diameter per each division (EWB2-50CK6)
EWE DIGITAL BORING HEAD Diameter: ø1 – ø54 Digital display allows the adjustment amount to be read at a glance	EWN04-7/ EWN04-15 Diameter: ø1 – ø15 Body diameter ø18.5mm (EWN04-7CK1) Micro boring head

Anti-Vibration bar: Smart Damper (CK Boring Type)

SMART DAMPER SW BORING HEAD PAT.	SMART DAMPER EWN BORING HEAD

PIN TURNING HEAD

ø0.5 – 686 Realizes finishing accuracy not possible with contouring.	ACCESSORIES Various shanks/accessories

• Clamping Range: ø3 – ø20
• Precision side lock holder to satisfy the requirements for minimum interference, accuracy and high speed.
• Interference-free tool layout is available without special equipment with just one wrench.
• A side lock holder in a class above the rest with superior balance and BIG-PLUS effect.

Runout accuracy within 5μm

2-flute ball endmills achieve a runout accuracy within 5μm. Both easy handling of side lock holder and high accuracy are realized.

Slim and tapered design minimizes interference

Interference is minimized with mold making. Also useful in machining draft angles of molds.

Balanced design realizes high speeds

With the entire outer diameter precision ground, stable machining is realized at high speeds.

Secure coolant supply to tool periphery

Center through coolant or oil mist can be ejected through the two coolant slits, allowing for a secure supply of coolant to the cutting edges. This helps in machining hard materials.

Face mill arbor FMA

Face mill arbor FMB

Face mill arbor FMC

Face mill arbor FMH

Smart Damper Type FMH

Jacobs Taper Arbor

Side Cutter Arbor

Morse Taper Holder

Side Lock Drill Holder

Side Lock Holder Type SLE

Side Lock Endmill Holder

Super Keyless Chuck

• Unique dynamic damper eliminates chatter!
• Achieves high speed and high efficiency machining for work requiring.

Chatter suppressing mechanism

An incorporated unique damper that functions as both a counter damper and friction damper.

Patent-pending counter weight maximizes effect of the friction damper. Chatter is absorbed effectively and higher machining accuracy is achieved.

VIDEO: 

Abundant series available for various machining requirements

CK Boring Series with Built-In Damper

High-efficiency deep hole finish boring is availableboring is available

EWN BORING HEAD Type Boring head with a built-in damper. The EWN Boring Head functions re maintained, featuring integrated damper.	SW BORING HEAD Type Boring head with a built-in damper. Damper located closer to the cutting edge provides greater damping effect.
CK Shank Type A damper is built into the CK Shank. L/D = 6x	CK Extension Type Just combine it with your standard CK Boring Head / CK Shank to achieve damping countermeasures.

FACE MILL ARBOR TYPE FMH with Built-in Damper

• Basic holders of different lengths can be used with one damperhead (for BBT/HSK Shank in common).

Internal Turning Tool with Built-in Damper BORING BAR

• Eliminates chatter in internal turning
• The heaviest damper in the series of smart dampers instantly absorbs chatter in both roughing and finishing operations.

Unique new mechanism built into compensate for synchronization errors

Improves thread quality and tap life by reducing thrust loads caused by synchronization errors up to 90%.

Reduces thrust load on both the tap and workpiece.

Due to feed misalignment occurring when the rotation is changed from forward to reverse, or tolerance to the tap pitch, 100% synchronization is hardly ever achieved. BIG MEGA SYNCHRO minimizes the thrust load to both the tap and workpiece to improve thread quality and tap life.

Comparison of surface finish

Tapping of difficult-to-cut materials with collet chuck tends to cause a compressed burr on the thread surface. BIG MEGA SYNCHRO compensates for synchronization errors and minimizes cutting load. Fine surface finish of threads is achieved.

Difference in loads depending on machining centers

The movement of the machine differs even at the same rpm, creating a completely different load. Even with maximum load Company A machining centers, the use of BIG MEGA SYNCHRO drastically reduces the load.

Center through cooling available as standard

Coolant is supplied both through the tool and to the tool periphery simultaneously, even for taps with oil holes.

VIDEO:

Abundant lineup from small to large diameter tapping

Lineup of types from small to large diameters

Small Diameter Tap MGT3 PAT Compensation mechanism eliminates synchronization errors and controls dynamic runout accuracy at high speed, providing stable thread quality and extended tap life. Tapping Range: M1-M3	Large Diameter Tap MGT36 PAT Compensation for synchronization error eliminates heavy thrust loads of large diameter tapping. Tapping Range: M20-M36

AUTO TAPPER B TYPE / R TYPE Tapping Range: M3-M30 The slimmest tapper with depth control within ±0.15mm.	AUTO TAPPER E TYPE Tapping Range: M3-M36 First choice for machining centers, with smooth axial float and torque adjustable tap collet.
CK SYNCHRONIZED TAP HOLDER STC TYPE Tapping Range: M2-M30 Flexible tool layout for synchronized tapping is available in combination with CK long shanks	DRILL TAPPER Tapping Range: M20-M52 A tapper equipped with properties ideal for large diameter tapping with large machining centers.

4 types suitable for specific applications

(Select the type suitable for the workpiece shape to machine from the large variety of products.)

AG90 series
High precision collet chuck system NBS TYPE	Max. 300mm extension to standard models EXTRA LONG	Coolant through tool OAG TYPE
Coolant through tool OAG TYPE	Interchangeable adapter system BUILD �?UP TYPE	ø32 high power design HMC32 TYPE
For face milling FACE MILL TYPE	Built-in tapping depth control system TAPPER TYPE

AG45 series	AGU series		ULTRA SMALL HEAD
45° series NBS TYPE	Angle adjustment by 1° increments UNIVERSAL TYPE	30° limited version AGU30 TYPE	ULTRA SMALL HEAD Prepared Hole Dia : ø30- Clamping Range : ø3 �?ø6

VIDEO:

Extended tool life with minimal thermal displacement

High speed rotation of the machine spindle generates heat, causing spindle expansion and Z-axial displacement. This displacement results in dimension defects of precision molds or tool breakage in micro machining.

The Air Turbine Spindle utilizes air for both driving and cooling the spindle simultaneously, thus the Z-axis displacement is eliminated.

Outstanding dynamic runout accuracy

Most problems associated with micro-machining are caused by poor dynamic runout of a machine spindle. We have established a runout measuring system that can detect spindle movement during rotation at high speed and achieved the best dynamic runout accuracy.

Video:

Specification:

●Ingress of the coolant to the bearings is eliminated by separating the bearing housing from the coolant channel, which elongates toolholder life drastically.

Abundant series lineup to support various machining

Specification: