Hydromechanical
Clamp Unit

OHZ-K

  • For dies and special machines of widely varying designs
  • For clamping carriages, pallets, turning knobs and similar objects
  • For clamping tailstocks, machine columns or H frames as well as lathe revolvers
  • Fixed installation

Mode of operation

The clamping force is generated by a toggle mechanism. This is actuated by a double-acting hydraulic cylinder.

Description

The hydraulically driven clamp unit generates the clamping force via a toggle mechanism. The system is mechanically self-locking. Low hydraulic pressure is only required during the process of clamping and unclamping. The Optima „Aktivator“ ensures that the clamping force is continuously monitored. In the event of clamping force loss, an error message is generated which causes the machine to stop. In order to unclamp, the opposite side of the main piston is supplied with hydraulic pressure.

  • Mechanically self-locking
  • Highest level of safety thanks to continuous clamping force monitoring
  • by the Optima „Aktivator“
  • Low operating pressure
  • High clamping force and small dimensions
  • Practically maintenance free
  • Fully automatic operation
  • Simple monitoring of functions by proximity switch / limit switch

  • Check valves
  • Fittings
  • Hydraulic hoses / Hydraulic accessories
  • Hydraulic power packs

Technical data

Type OHZ-K 50 S OHZ-K
100 S		 OHZ-K
200 S
Clamping force [kN] / 50 100 200
max. loading force [kN] 1 ) 63 125 250
max. Betriebsdruck [bar] min./max. 90/100 110 / 140
Clamping dimension tolerance [mm] +/- 0,2
Oil volume: Clamp / unclamp [cm3] 30 / 30 70 / 70 130 / 130
max. oil volume flow [l/min] 2) 0,4 - 0,6 1,0 - 1,5 1,5 - 2,0
Limit switch: Number / type (optional)
Supply voltage
Connection type
Designation		 1 inductive proximity
switch
10-30 V DC
Plug-in type M 12
S6		 1 mechanical limit
switch
250 V AC
Screw connection
S6
max. operating temperature[°C] 70
Weight [kg] 10 15 20

 

1* Mechanical damage may occur at higher loads.
2* If a pump with a greater output is used, the oil flow must be reduced by means of flow control valves or pilot-controlled check valves

Fixing is achieved with four screws, DIN EN ISO 4762 strength class 10.9 (not included).