Hydraulic extension
Contact force by a spring
Single-acting with spring return
Hydraulic work supports
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Work support with cartridge – 500 bar – hydraulic extension AVCH
Cartridge type
Locking force at 500 bar: 12 to 35 kN
Hydraulic supports are designed to support the workpieces in a specific plane and eliminate vibration during machining.
Support with single hydraulic supply port for extension and locking of the rod.
For the operating principle, consult the guide.
Examples of fixtures, see at the bottom of the page.
• fastened by upper flange
• direct supply through manifold block
• stainless steel return spring
• supplied with O-rings and anti-extrusion rings.
Please enquire for clamping pressure values below 150 bar.
Special models on request.
IMPORTANT
The bleeder must be located at the highest point in the fixture.
In order to allow spring return, the counter pressure must not exceed 2 bar
Max flow rate: 1.5 l/min
Locking force diagram
Contact force diagram
| Locking force | Elastic collapse at 500 bar | Travel |
Rod Ø |
Type | Part numbers | ||||||||||||||||||||
| D | a | b | c | øe | øf | g | h1 | h2 | h3 | m | n | p | r | s | u | ||||||||||
| 500 bar | 300 bar | 150 bar | |||||||||||||||||||||||
| kN | kN | kN | µm/kN | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | ° | |||||
| 12 | 7 | 2.8 | 4.5 | 12 | 20 | AVCH 12 | 751 047/000 | 42 | 28 | 20 | 84 | 67 | 54 | M12 lg. 12 | 10 | 44 | 58 | 11 | 6.5 | 7 | 42 | 17 | 30 | 3D | |
| 20 | 12.5 | 4.7 | 3 | 12 | 30 | AVCH 22 | 751 050/000 | 54 | 32 | 22 | 82 | 79 | 66 | M12 lg. 15 | 10 | 44 | 58 | 11 | 6.5 | 7 | 54 | 26 | 30 | 3D | |
| 35 | 22 | 7 | 2 | 16 | 40 | AVCH 42 | 751 078/000 | 67 | 40 | 28 | 110 | 98 | 82 | M16 lg. 14 | 10 | 57.5 | 76 | 14 | 9 | 9 | 67 | 34 | 35 | 3D | |
Recess machining dimensions
IMPORTANT:
The bleeder must always be located at the highest point in the fixture.
Bleed at low pressure (below 20 bar)
General tolerances Js13
Round off and polish sharp angles
| Type
|
øD
H7 |
b
|
L
min |
f1
|
f2
|
f3
|
G
max |
h
min |
k
|
m
|
r
|
s
|
t
|
u
|
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | ° | ||
| AVCH 12 | 42 | 3 | 86 | 16 | 33 | 50 | 5 | 0,7 | 8 | 54 | M6 | 10 | 13 | 30 |
| AVCH 22 | 54 | 3 | 84 | 16 | 33 | 49 | 5 | 0,7 | 8 | 66 | M6 | 10 | 13 | 30 |
| AVCH 42 | 67 | 3 | 112 | 16 | 46,5 | 68 | 6 | 1 | 10 | 82 | M8 | 15 | 22 | 35 |
Examples
