Specialist for bar grippers, bar pullers for CNC machines: English site of Berger GmbH Germany.

Bar puller

bar puller variety

Bar puller

  • automatic pulling of material, diameter 1 - 70 mm (NC/CNC-machines) with different shanks
  • changeable shanks in three different sizes
  • one set clamping path all diameters
  • infinitely adjustable

Following executions are available:

 
bar-puller shank
Order nr.
shank
D
shank
L
 
OTG G 225
G 232
G 240
G 250
25
32
40
50
63
63
63
63
 

 

 

 

OTG1

shank to DIN 69880


G 251
G 252
G 256

 

 

 

30
40
50

 

 

 

55
63
78

 
OTG2 G 254
G 253
16
20
32
40
 
         
Type A B L1 L2
 
OTG 70 50 17 78
 
OTG1 70 50 17 58
 
OTG2 50 42 14 55
 
Bar puller: Example of setting the gripper jaws

Setting the gripper jaws of the barpuller

 

  1. gripper jaws measure >>Z<<
  2. pull the bar ca. 70 mm off the clamp
  3. gripper jaws release
  4. manual approach to ca. diameter
  5. adjustment of the bar puller = diameter of the bar - max. 3 mm
  6. tighten the jaws

 

One set of gripper jaws for all diameters.

Steplessly adjustable.

 

Sample program:

 

workpiece length = 17 mm

to pull out = workpiece length + parting steel = 20 mm

the diameter of the bar = 50 mm

1. G0 x 80 Z - 25 Approach in rapid motion
 
2. G0 x 0   Position in X (diameter)
 
3. M6   Release clamp
 
4. G0 Z - 5 Pull bar
 
5. M7   Close clamp
 
6. G0 x 80   Take away the tool turret
barpuller cylindric shank

 

 

Bar puller with cylindric shank

 

OTG - G 220

OTG - G 225

OTG - G 232

OTG - G 240

OTG - G 250

bar puller different models

 

Bar puller

different

models

 

cylindric shank

VDI-shank

Mazak QT 10

bar puller VDI execution

 

 

Bar puller VDI

(shank to DIN 69880)

 

OTG 1 - G 251 VDI 30

OTG 1 - G 252 VDI 40

OTG 1 - G 256 VDI 50

 

OTG 1 - G 254 VDI 16

OTG 1 - G 253 VDI 20

bar puller Sandvik

 

 

 

 

Bar puller

Sandvik

Coromant Capto

 

OTG 1 - G C4

OTG 1 - G C5