DC gear motors

Dc gear motors diameter 77 interaxis 35 with replaceable brushes with hall sensor gmr77-43-z1a-x-h


Stall torque from 104,0Nm to 27,5Nm

The GMR77-43-Z1a-X-H gear motors are not equipped with filter, they have a circuit with one or two Hall sensors and the brushes can be replaced. The rotor shaft has a worm with one threads.

The Hall sensor supplies a signal which allows to count the number of rotations made by the motor. With two Hall sensor it is possible to determine also the rotation direction of the electric motor.

The replaceable brushes allow a longer life to the motor and they can be replaced by removing the plastic part screwed to the brush-holder.

In the technical data-sheet it is possible to select the output gear shaft and to request a particular set of cables by inserting it in the enquiry form.

In the table “Electric Data” one can see the application voltage range and the performances for the most commonly used voltages, 12V and 24V.

The interactive curve allows to select the required performances by selecting the power voltage and the no-load speed.


The  GMR77-43-Z1a-X-H electric gear motors are used in linear actuators, in garage door openers and in automatisms of various kind.

Electric data

12 V 24 V
Standard nominal voltage 12 V 24 V
No load speed
N0 [Rpm]
95÷30 95÷30
No load current
I0 [A]
1.85÷1.15 0.95÷0.55
Nominal speed
Nn [Rpm]
92.50÷27.60 92÷26.80
Nominal torque
Mn [Nm]
2.70 3.60
Nominal current
In [A]
6.90÷2.20 4÷1.35
Nominal power
Pn [W]
26.10÷7.80 34.50÷11
Stall torque
Ms [Nm]
104÷27.50 104÷27.50
Starting current
Is [A]
128÷11.60 64÷5.80
Max power
Pmax [W]
260÷26 260÷26
Max efficiency
ηmax [%]
49÷37.70 49÷37.70

Mechanical data

Gear's materials Plastic
Gear ratio 47:1
Type of duty S1
Weight 2.35

Technical drawing

Dc gear motors diameter 77 interaxis 35 with replaceable brushes with hall sensor gmr77-43-z1a-x-h

Hall sensor's diagram

Set the characteristic curve

The characteristic curve of the DC electric motors is made of a diagram represented in the Cartesian axis based on the values which are inserted, where once can see represented the torque, in [Nm] (axis X); the rotation speed, in [Rpm] (axis y1); the absorbed current, in [A] (axis y2); the efficiency (axis y3).

No-Load RPM gear motor:
Power voltage:

Ask for a quotation for this motor

Please note that we do not sell to private buyers and that we cannot supply any replacement motor.