SMW-AUTOBLOK EN

BB-D BB-M

High precision power chuck Ø 140 - 435 mm

■ EXTRA large through-hole ■ 3 jaws

INCH SERRATION

METRIC SERRATION

Application/customer benefits • For open center or partial open center clamping • For machines with very large spindle bore BB-D: Master jaws with INCH SERRATION (1/16”x 90°) BB-M: Master jaws with METRIC SERRATION (1.5 mm x 60°) (Suitable for Japanese chucks top jaws) Technical features • EXTRA large through-hole • Gripping force transmission via wedge hook • Case hardened body to assure greatest precision and long chuck life Standard equipment

Ordering example 3-jaw chuck BB-D 175 / A6

3-jaw chuck

1 set T-nuts with bolts 1 set soft top jaws

or

3-jaw chuck BB-M 250 / Z220

Mounting bolts

Actual gripping force diagrams

70

240

60

210

50

180

150

40

175

120

30

435

140

90

F G

20

315

250-255

F G

60

F

210

F

10

30

0

0 1000 2000 3000 4000 5000 6000 7000

1000

2000

3000

4000

5000

Speed (r.p.m.)

Speed (r.p.m.)

Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly.

The data in the diagrams refer to 3-jaw chucks, newly maintained according to their service manuals using SMW-AUTOBLOK K67 grease. The static and dynamic gripping forces have been measured using standard soft top jaws, placed in a position not exceeding the outer diameter of the chuck.

Technical data

SMW-AUTOBLOK Type

BB-D 140 BB-M 140

BB-D 175 BB-M 175

BB-D 210 BB-M 210

BB-D 250 BB-M 250

BB-D 255 BB-M 255

BB-D 315 BB-M 315

BB-D 435 BB-M 435

3

3

3

3

3

3

3

Number of jaws Through-hole Radial jaw stroke Axial piston stroke Max. draw pull* Max. gripping force*

39

56

66

78

82

122

167

mm mm mm

3.2

3.2

4

5

5

5

6,5

15 22 58

15 25 70

19 38

24 50

24 50

24 50

31 70

kN kN

108

145

145

145

210

7000

6000 11.5 0.05

5000 19.5 0.12

4000

4000

3200

2250

Max. speed

r.p.m.

6

30

33

44

122

kg

Weight (without top jaws)

0.016

0.27

0.32

0.62

3,5

Moment of inertia

kg·m 2

SIN-S 85 / 100 SIN-S 100 SIN-S 100 / 25 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 150 / 200 VNK-T2 70-37 VNK-T2 130-52 VNK-T2 150-67 VNK-T2 170-77 VNK-T2 176-82 VNK-T2 320-127 VNK-T2 450-165 77150714 77150917 77150921 77150725 77150726 77150731 77150743 77150814 77151117 77151121 77151025 77151026 77150831 77150843

Recommended actuating cylinders without hole Recommended actuating cylinders with hole

Id. No. BB-D 3 jaws (Center mounting) Id. No. BB-M 3 jaws (Center mounting)

* For internal clamping reduce the draw pull by 30%.

SMW-AUTOBLOK 470

SMW-AUTOBLOK 472

SMW-AUTOBLOK 335

112 SMW-AUTOBLOK

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