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Series
L7.101

Linear actuators RH 1250

lifting force 4.5 to 12.5 kN
strokes 80 to 250 mm
manual-hydraulic version
Linear actuators RH 1250
Downloads
Catalogue sheet
Operating instructions
Information Series
Description
Linear actuators RH 1250

Principal use
• Height adjustment of hospital and nursing beds as well as mobile nursing chairs
• Height adjustment of patient transporters and therapy couches
• Adjustment of examination and care chairs as well as childbirth beds
• Height adjustment of instrument tables
• Actuator for lifting modules and lifting tables

Description
Linear actuators RH 1250 are manually operated, hermetically sealed, hydro-mechanical actuators for linear adjusting procedures.
The compact design contains the pump piston and the valve technology. Also the oil reservoir and the plunger cylinder are integrated. The hydraulic transmission in connection with the manual operation allows a good dosage of very high forces. Important for that are also the mechanics with minimum clearance as well as the sensitive responding valves with exactly defined switching points.
In principle only push forces can be generated.

Linear actuator RH 1250
Linear actuator RH 1250
Operation

The plunger rod is extended by reversible rotation of approx. 40° by an operating lever at the operating shaft. The recommended lever length is approx. 300 mm.
To retract the plunger cylinder, the operating shaft has to be turned to the opposite direction by approx. 10°. The operating shaft returns automatically.

Functioning
All versions of the RH 1250 are operated with an operating lever, that is pinned at the operating shaft. The integrated flow control valve provides for an uniform descent speed in all load conditions.
Due to the possibility to get a drilled operating shaft, the actuator can quickly be installed and put into operation.
It has to be considered that the user's construction always acts with push force onto the actuator.
The actuator has a high safety against overload. In the case of overload it is not possible to continue pumping the actuator, but descent is possible. The operator has to make sure that the actuator is not overloaded.

Fixing and installation

The linear actuators RH 1250 have 1 location hole Ø 12.1 mm in the plunger and 2 centring pivots Ø 38 mm for the connection of user's constructions.
Besides the standard mounting with centring pivot Ø 38 mm mounted at the housing, the RH 1250 can be delivered with fork mounting or flange mounting.
The user's construction must exclude side loads and forced conditions. The centring pivots Ø 38 mm are unlacquered.

Operating direction

There are two different operating directions of the pump lever. 
Dependent on the operating direction, the admissible mounting positions have to be considered.
Operating direction A
Pump lever counterclockwise (figure 5a)
Admissible mounting positions as per figure 5b.

Operating direction D 
Pump lever clockwise (figure 6a)
Admissible mounting positions as per figure 6b.

Material
body: aluminium
operating shaft: steel, corrosion resistant
plunger: steel, corrosion resistant

Colours
• unlacquered
• 2 = RAL 9016 traffic white
• 3 = RAL 9006 white aluminium
• 4 = RAL 9005 black
• 5 = RAL 7035 light grey
• 6 = RAL 7038 agate grey

Available on request:
• stroke lengths up to 600 mm in gradations of 50 mm (up to lifting force 6,500 N)
• descent actuation by pushing
• descent actuation by turning
• front-side thread M8 in the plunger
• versions with low residual magnetism for MRT applications
• other descent speeds
• other colours
• customised special actuators

Products (1152)
Loading…
type
RH 1250 (1152)
stroke [mm]
fixation
max. force to push [N]
bore hole operating shaft
colour
operating direction
Item no. CAD datatypestroke [mm]fixationmax. force to push [N]
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
Properties
Item no.
CAD data
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
Properties
Loading…
Item no.
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 9005 black
operating direction
pump lever counterclockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 9005 black
operating direction
pump lever clockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 7035 light grey
operating direction
pump lever counterclockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 7035 light grey
operating direction
pump lever clockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 7038 agate grey
operating direction
pump lever counterclockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
flange
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 7038 agate grey
operating direction
pump lever clockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
unlacquered
operating direction
pump lever counterclockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
unlacquered
operating direction
pump lever clockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 9016 traffic white
operating direction
pump lever counterclockwise
Item no.
type
RH 1250
stroke [mm]
80
fixation
fork
max. force to push [N]
6500
bore hole operating shaft
without bore hole
colour
RAL 9016 traffic white
operating direction
pump lever clockwise
Accessories (6)
Item no. CAD data Description
Item no.
CAD data
Description
Foot pedal, pre-drilled for the arrangement of 90° to the shaft bore hole as per data sheet L7.101
Item no.
CAD data
Description
Foot pedal, without bore hole for application-specific arrangement as per data sheet L7.101
Item no.
CAD data
Description
Hand lever, pre-drilled for the arrangement of 90° to the shaft bore hole as per data sheet L7.101
Item no.
CAD data
Description
Hand lever, without bore hole or application-specific arrangement as per data sheet L7.101
Item no.
CAD data
Description
Bearing block for bearing eye Ø38 mm as per data sheet L7.101
Item no.
CAD data
Description
Pedal cover, black as per data sheet L7.101
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Accessories

Foot pedal
• pre-drilled for the arrangement of 90° to the shaft bore hole
• without bore hole for application-specific arrangement

Hand lever
• pre-drilled for the arrangement of 90° to the shaft bore hole
• without bore hole for application-specific arrangement.

Bearing block
For location of the RH 1250 at the bearing eyes Ø 38
two of each required

Pedal cover
for levers provided by the user or as spare part