BBT30 Tooling SystemBBT30 Tooling SystemBBT30 Tooling SystemBBT30 Tooling System

Firm contacting of flange surface achieves stable high accuracy for fitting.

Duplex-holding prevents fretting.

Even if the spindle is expanded during high speed rotation, the taper and flange surface contacts firmly, Sustaining balancing of duplex-holding achieves high efficient machining.

＜Adopting BIG-PLUS Spindle System＞With the duplex-holding by taper and flange surface, the bending stiffness is stronger and the high speed cutting and feeding is available. Since the flange surface contacts with the spindle surface, sinking of the holder is prevented during high speed rotation and heavy cutting. The Z-direction dimension stability is firmer.

BIG-PLUS Spindle System is a licensed product of BIG DAISHOWA SEIKI CO LTD.

Comparison with conventional holders

No Sinking of HolderZ-direction Dimension Stability andWorking Face Accuracy Improved

Prevention of Z-dimension variation in high speed rotation

Bending Stiffness Improved by Duplex-Holding

Anti-vibration Improved by Duplex-Holding

High Efficient Machining in High Speed Rotation/Feeding

Long life of cutting tools

Repeating Accuracy of On/Off-Spindle Improved

Conventional BT shank system BBT Duplex-Holding system

Surface ContactGap

BIG-PLUS Spindle System is a licensed product of BIG DAISHOWA SEIKI CO LTD.

◆The above Maxｌof tapered is the length when Length Adjustment Bolt (APM) is used.◆Dimensions of tapered shank are in accordance with the standard of BIG-PLUS spindle.◆Collet, Spanner, Coolant-Sealing Back-up Screw, Length Adjustment Bolt and retention knob are not included in the above. They are separate accessories.※For the collets and spanners, please refer to page 43.

0.50.60.70.50.60.70.50.60.80.50.70.90.50.80.71.0

47

52

46

51

38

62

̶68̶73

457510545751054575105457510545756090

BBT30

BBT30

BBT30

BBT30

BBT30

BBT30

-SGC6-45-SGC6-75-SGC6-105-SGC8-45-SGC8-75-SGC8-105-SGC10-45-SGC10-75-SGC10-105-SGC12-45-SGC12-75-SGC12-105-SGC16-45-SGC16-75-SGC20-60-SGC20-90

93.4123.4153.493.4123.4153.493.4123.4153.493.4123.4153.493.4123.4108.4138.4

APM6

APM8-2

APM10-2

APM12-2

　 ̶APM16-2 ̶APM20-2

FS20

FS26

FS33

FS36

FS42

FS50

CSH6

CSH8

CSH10

CSH12

CSH16

CSH20

SGN6

SGN8

SGN10

SGN12

SGN16

SGN20

SG6

SG8

SG10

SG12

SG16

SG20

BBT307/24

M8×0.75

M10×1.5

M12×1.5

M14×1.5

20

26

31

36

42

50

1.0～6.0

1.0～8.0

2.0～10.0

3.0～12.5

3.0～16.0

3.0～20.0

̶M18×1.5̶

M22×1.5

■Ultra High PrecisionGuaranteeing the integrated runout accuracy of within 5μm.

Highest precision in this industrial field.

■Super Rigidity･Super Grip ForceMost effectively usable for machining work by the end-mill.

■Super BalancingFor high rotation machining, even the standard model can be used

for rotation up to 25,000min-1

■SafetyLocknut and Safety Cover (PAT.) ensuring

safety in high rotation machining.

BBT30 Super G1 Chucks

g ℓ

φD

φd

L 2

L 1

BBT30 New Drill Mill Chucks

※Coolant seal screw cannot be used. ◆Dimensions of the Taper Shank are in accordance with the standard of BIG-PLUS spindle. ◆Dimensions of Max. ｌ are those when length adjustment bolt -APM type is used. ◆Collet, spanner, retention knob, coolant sealing back up screw, length adjustment bolt are not included the above. They are separate accessories.※For the collets and spanners, please refer to page 45.

0.50.60.70.50.60.70.50.70.90.50.70.90.70.91.10.71.01.21.01.7

6090120609012060901206090120751051207510512090120

55

52

50

62

68

60

73

80

BBT30

BBT30

BBT30

BBT30

BBT30

BBT30

BBT30

-NDC7S-60-NDC7S-90-NDC7S-120-NDC7-60-NDC7-90-NDC7-120-NDC10-60-NDC10-90-NDC10-120-NDC13-60-NDC13-90-NDC13-120-NDC16-75-NDC16-105-NDC16-120-NDC20-75-NDC20-105-NDC20-120-NDC25-90-NDC25-120

CSH7

CSH10

CSH13

CSH16

CSH20̶

̶̶

APM7-2

APM10-2

APM13-2

APM16-2

APM13-1

APM20-2

APM13-2

FS22

FS26

FS33

FS36

FS42

FS52

FS62

108.4138.4168.4108.4138.4168.4108.4138.4168.4108.4138.4168.4123.4153.4168.4123.4153.4168.4138.4168.4

NDN7S

NDN7

NDN10

NDN13

NDN16

NDN20

NDN25

YCC10

YCC7M8×0.75

M12×1.5

M15×1.5

M18×1.5

M15×1.5

M22×1.5

M15×1.5

YCC13

YCC16

YCC20

YCC25

33

22

25

36

42

52

62

0.5～10.0

0.5～7.0

0.5～13.0

2.5～16.0

3.5～20.0

5.0～25.0

BBT307/24

※

※※

g ℓ

φD

φd

Gauge line

L 2

L 1

TaperModelMaximumℓ

Length Adjustment ScrewLength from theGauge Line L2

Nut Outside DiameterD

Total LengthL1

Gripping Capacityd

Weight (kg)Length AdjustmentScrew (option)

Applicable Spanner(option)

Coolant SealScrew (option)

ApplicableLock Nut

Applicable Collet (option)

Unit: mm

●Dimensional Drawing

Gaug

e li

neTaper

●Dimensional Drawing

Taper

■Wide Range of UseVarious cutting tools including drill bits, tapping drills, reamers,

and end mills can be chucked.

■High Gripping ForceThat is an advantage of double taper collets.

■Applicable to high-pressure coolantCoolant of high pressure up to 7.0MPa is usable.

■High BalancingGrinding of the external surface of

the holder secures a high balancing.

Weight (kg)Length AdjustmentScrew (option)

TaperModelMaximumℓ

Length Adjustment Screw Applicable Spanner(option)

Coolant SealScrew (option)

ApplicableLock Nut

Applicable Collet (option)

Length from theGauge Line L2

Total LengthL1

Unit: mm

Nut Outside DiameterD

Gripping Capacityd

BBT30 Power Lock Milling Chucks

BBT30 Face Mill Arbors

●Dimensional Drawing

※ Special sizes are also available.

※ Retention knob is a separate accessory.

BBT30

BBT30

BBT30

-FMA22-40-FMA22-60-FMA22.225-40-FMA22.225-60-FMA22.225-90-FMA25.4-60-FMA25.4-90

40604060906090

0.700.900.700.901.301.001.50

D1 L1

22.0

22.225

25.4

B1

φ10

8

9.5

B2 D3 D4 H1 H2 W

5

3.5

5

G

M10

M8

M12

13

33

̶

23

8

10

̶

12

6

10

D2

45

45

50

BBT307/24

L2

18

18

22

（六角穴付ボルトM10×35ℓ）

φD1

φD2

φD4

φD3

B1

Taper

L1 L2

B2

Gauge line

GH2

H1W

●Dimensional　Drawing

※Please use a tool of which shank diameter tolerance h7.

※Dimensions of tapered shank are in accordance with the standard of BIG-PLUS spindle.

※Straight collet and Spanner are not included in the above. They are separate accessories.

※For the collets and spanners, please refer to page 46.

BBT30-PMC20-75 FS55 0.96BBT307/2475SCR20SCA20SCC20

75123.45220

Super Keyless Drill Chucks with BBT30 Shank

●Dimensional Drawing

BBT30-SLC13-110 1.4051

D

110

L1

122.5

L2

BBT300.5～13 FS13LC

46.775

φ20φ52

56～66

28.31

BBT30

φD

L1

L2

■High gripping torqueGripping torque was increased by making the tightening

collar thicker, and by strengthening tightening of the

opening by modifying chuck ID with straight slit.

■High Rigidity・High AccuracyHigh rigidity thanks to tightening collar end

holding system (duplex holding) and it is

manufactured with concentricity within 0.005mm

Unit: mm

ModelGrip Diameter

dNut OutsideDiameter D

Total LengthL1

Length from theGauge Line L2

Maximum ℓ TaperApplicable Collet

(option)Applicable Spanner

(option)Weight (kg)

Unit: mm

Model Weight (kg)Taper

■The sleeve-lock mechanism working 　

in reverse rotation.

■M16 tapping available.

■Run-out accuracy: smaller than

　0.05mm

Unit: mm

Model TaperGrippingCapacity

ApplicableSpanner

Weight(kg)

CNC Keyless Drill Chucks with BBT30 Shank

BBT30-LC6.5F-70BBT30-LC13F-90

0.601.15

3450

D

7090

L1

76102

L2

BBT300.5～6.50.5～13

FS6.5LCFS13LC

●Dimensional Drawing

D1

Taper

L1

L2

■Integration of shank and chuck made 　

its compact size and safety.

■Re-tightening with hook spanner

　prevents loosening at an emergency 　

stopping.

■Run-out accuracy: smaller

　than 0.05mm

Model TaperGrippingCapacity

ApplicableSpanner

Weight(kg)

Unit: mm

49-5051-52.pdf