GM32 Step Motor

Motor Step Angle: 7,5°, full step
Number of Phase: 2, bipolar
Insulation resistance: 100 MΩ, 500Vdc
Insulation class: E
Coil Resistance/Induction: 23Ω/9mH
Max temp. (motor housing): 60 °C
Racc. temp (motor housing): 35-45 °C

Nominal voltage: 12V
Voltage driver: 9,2 – 36V
Max axial/radial shaft load: 5N/10N
Max allow torque: 20 Ncm
Max current (continuous): 150 mA
Max current (non-contin.): 400 mA
Operating temp.: -20 °C/+65 °C


Type	Ratio To:1	Length (mm)	Holding Tourqe (mNm)	Max Speed (rpm)
GM32-10-25	10	26	220	150
GM32-21-25	20.8	26	400	72
GM32-43-25	43.3	31	400	35
GM32-90-25	90.3	31	400	17
GM32-188-25	188	36	400	8
GM32-391-25	391.8	36	400	4

Stepper Gearmotor Driver Available

The step-motor is a synchronous electric motor with pulsed direct current and brushless electronic control which can divide its rotation into a large number of steps. Unlike brush DC motors, the position of the motor can be accurately controlled without an encoder (feedback).

The GM32 series is a compact stepper gearmotor designed for precision applications requiring accurate positioning, stable torque, and smooth motion in limited space. With a 7.5° full-step angle, 2-phase bipolar design, and gearbox ratios ranging from 10:1 to 391:1, the GM32 delivers reliable performance in a lightweight package just 26–36 mm long.

Technical Highlights

Motor type: 2-phase bipolar stepper motor
Step angle: 7.5° (full step)
Nominal voltage: 12 V (driver range 9.2 – 36 V)
Coil resistance/induction: 23 Ω / 9 mH
Insulation class: E
Insulation resistance: 100 MΩ at 500 VDC
Maximum housing temperature: 60 °C (recommended 35–45 °C)
Operating temperature range: –20 °C to +65 °C
Shaft loads: up to 5 N axial, 10 N radial
Maximum torque: 20 Ncm
Continuous current: 150 mA (400 mA peak)
Driver: compatible with GM-STEP-DRIVER-1

Gearbox Options

Model	Ratio	Length (mm)	Holding Torque (mNm)	Max Speed (rpm)
GM32-10-25	10:1	26	220	150
GM32-21-25	20.8:1	26	400	72
GM32-43-25	43:1	31	400	35
GM32-90-25	90:1	31	400	17
GM32-188-25	188:1	36	400	8
GM32-391-25	392:1	36	400	4

This flexibility allows the GM32 to provide either higher speeds with moderate torque, or extremely slow, precise rotation with stable holding torque.

Advantages

High positioning accuracy: step resolution ensures precise motion control without encoders.
Ultra-compact design: length between 26–36 mm, ideal for portable and space-constrained devices.
Stable torque: up to 400 mNm holding torque even at very low speeds.
Low power consumption: continuous current of only 150 mA.
Reliable construction: optimized for light-duty applications with axial/radial loads.

Suggested Applications

Compact Automation Systems
- Small conveyors, dosing pumps, and miniature positioning modules.
Medical & Laboratory Devices
- Portable diagnostic instruments, analyzers, and micro-pumps.
Optical & Imaging Equipment
- Camera filter wheels, focusing mechanisms, and scanning units.
Consumer & Educational Products
- 3D printers, vending machines, robotics kits.
Precision Mechatronics
- Pick & place tools, micro-actuators, and inspection systems.

The GM32 Step Motor with Gearbox delivers precise positioning and reliable torque in an exceptionally compact package. With multiple gearbox ratios, torque levels up to 400 mNm, and low power requirements, the GM32 is an excellent choice for engineers developing automation, medical, laboratory, and consumer devices where space efficiency and accuracy are critical.