SMW-AUTOBLOK EN

RAN

High precision pull-down chuck Ø 160 - 400 mm

■ Pull-down effect of inclined master jaws ■ Tongue & groove master jaws ■ 3 jaws

TONGUE & GROOVE

Application/customer benefits • 1st or 2nd operation of parts requesting close squareness and parallelism tolerances • For chucking parts • External clamping only RAN: Inclined master jaws with pull-down effect and TONGUE & GROOVE Technical features • Chuck only available with 3 tongue & groove master jaws • Clamping on raw diameters with carbide inserts, increases the pull-down effect thanks to the penetration into the workpiece • Central bore for coolant and / or air • Chuck body and internal parts case hardened Standard equipment Ordering example 3-jaw chuck 3-jaw chuck RAN 200 / A6 Mounting bolts or 3-jaw chuck RAN 315 / A8

Actual gripping force diagrams

140

120 100 140 160 180

120

250

100

80

200

250

400

60

80 60 40 20

315

160

200

F G

F G

40

F

F

160

20

0

1000

2000

3000 3500

5000

0

1000

2000

3000

4000

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 Number of jaws Radial jaw stroke Axial jaw stroke (pull-down)

RAN 160

RAN 200

RAN 250

RAN 315

RAN 400

3 5

3 5

3 6

3 8 2

3 8 2

mm mm mm

1.25

1.25

1.5

Axial piston stroke

20 25 57

20 40 92

25 55

32 65

32 80

Max. draw pull

kN kN

Max. gripping force

125

150

185

Max. speed

r.p.m.

5000

4500

3800

3000

2200

Weight (without top jaws)

kg

10

17

31

54

95

Moment of inertia

kg·m 2

0.034

0.10 0.92

0.26 1.25

0.65 2.15

1.85

Top jaw reference mass

kg

0.58

3.6

Recommended actuating cylinders

Type

SIN-S 85 / 100 SIN-S 100 / 125 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 150 / 175

Id. No. RAN (Center mounting)

77383216

77383220

77383225

77383231

77383240

SMW-AUTOBLOK 476

SMW-AUTOBLOK 470

SMW-AUTOBLOK 335

94 SMW-AUTOBLOK

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