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Advantages of rod locking with pressure piston seal:
  • For particularly sensitive applications
  • Low sliding friction
  • Speeds of up to 2 m/s possible
  • Pressure-independent sliding friction

Functional principle of the clamping unit with pressure piston seal

The Ratio-Clamp® rod locking system works on the principle of frictional contact: In the depressurized starting position, the force stored in the springs is deflected via the cone and clamps a round rod. When the hydraulic releasing pressure is applied, the locking piston is moved against the spring force, thus releasing the clamp.

Ratio-Clamp® rod locking with pressure piston seal
The pressurized seals on the clamping sleeve and locking piston have been replaced by a pressure piston seal that does not touch the rod. As a result, the extremely low sliding friction is independent of the releasing pressure and remains constant.
Ratio-Clamp® with pressure piston seal
Engineering drawings and CAD dataCAD data for the clamping unit can be found in our HÄKO or at Cadenas.
Cadenas - PARTcommunity

Technical data of the rod locking with pressure piston seal

Since the clamping geometry and spring are identical to the standard Ratio-Clamp®, the same holding loads can be achieved. However, due to the smaller hydraulic working area, the minimum permissible releasing pressure increases. The maximum releasing pressure remains at 160 bar.

  • For all round rods with a hard surface
  • Loadable regardless of direction
  • After 2 million switching cycles, a factory inspection of the Ratio-Clamp® is necessary.
  • Max. rod speed: 1 m/s with Servocop®, 2 m/s with pressure piston seal
  • Max. releasing pressure: 160 bar
  • Working temperature: -30°C to +80°C
  • Fluids: Mineral oils, others such as water, HFC or Skydrol® upon request
Technical data as PDF
Here you will find all the technical data for our Ratio-Clamp clamping unit® on an overview sheet.
DE EN FR ZH IT
RATIO-CLAMP®

 RATIO-CLAMP®
PRESSURE PISTON SEAL
+ Releasing pressure
+ Locking
+ Sealing system
+ Certification		 Basic design
With spring force
Servocop®
TÜV		 Basic design
With spring force
Pressure piston seal
TÜV
Rod-Ø
(mm)
 Holding load max.
(kN)
 Releasing
pressure min.
(bar)		 Holding load max.
(kN)
 Releasing
pressure min.
(bar)
 16  10     60   
 18  12,5  55    12,5  75   
 20  14     55     14     75   
 22  17     70     17     90   
 25  20     70     20     90   
 28  31,5  90     31,5  120   
 30  40     105     40     135   
 32  40     60     40     90   
 36  45     75    45     100   
 40  50     80     50     100   
 45  65     70     65     90   
 50  80     90     80     110   
 56  90     75     90     100   
 60  100     75     100     100   
 63  100     85     100     110   
 70  140     80     140     110   
 80  180     90     180     110   
 90  200     65    200    85   
 100  250     75     250     95   
 110  300     65     300     90   
 120  330     70     330     90   
 125  350     75     350     90   
 140  450     65   
 160  750     90   

 

Further holding loads & rod Ø on request.
A hydraulic locking mechanism is possible up to 2,000 kN holding load and rod Ø 300 mm.
The values given apply to operation with mineral oil. The holding load may differ when using other fluids.

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