GGM K35-3640 Series BLDC Planetary Geared Motor

GGM K35-3640 Series BLDC Planetary Geared Motor

The GGM K35-3640 BLDC Series is a BLDC Planetary Geared Motor that combines a brushless DC motor with a coaxial planetary gearbox. The gearhead features a Ø35mm outer diameter, a Ø6mm D-cut output shaft, and four M3 threaded holes, making it suitable for drive assemblies requiring speed regulation within a compact installation footprint.

The series offers two motor options: KB3640S1 DC 12V and KB3640S2 DC 24V. Each motor can be paired with 13 gear ratios ranging from 1/5 to 1/721, resulting in 26 model combinations based on voltage, speed, and output torque.

The motor utilizes a six-wire connection for power, PWM, FG signal, CW/CCW control, and brake signal. The speed controller specified by GGM is the GUN Type.

Key Features of the GGM K35-3640 BLDC Series

Planetary gearhead Ø35mm

The GGM K35-3640 utilizes a planetary gearhead with a Ø35mm outer diameter. The output shaft has a Ø6mm diameter, machined in a D-cut profile with a 5.5mm flat section.

The shaft extension length is 19.3 ± 0.5mm. The front face of the gearhead features four M3 threaded holes, 7mm deep, arranged on a Ø26mm PCD.

Two BLDC motor options: 12V and 24V

The series utilizes two motor models:

• KB3640S1: 12V DC power supply.

• KB3640S2: 24V DC power supply.

The KB3640S1 has a no-load speed of 5,300rpm and a rated speed at max efficiency of 4,500rpm. The KB3640S2 has a no-load speed of 5,000rpm and a rated speed at max efficiency of 3,900rpm.

The 24V version provides higher motor torque at max efficiency but lower output speed compared to the 12V version when using the same gear ratio.

PWM control and FG signal

The PWM wire allows for motor speed control via a GUN Type controller or a compatible control circuit. The FG wire provides a feedback signal of 6 pulses per motor revolution.

The FG signal can be used for monitoring or speed calculation by a PLC, microcontroller, or machine controller.

CW/CCW control and electric brake

The K35-3640 includes a CW/CCW wire for rotation direction control and a Brake wire for electric braking functionality according to GGM wiring diagrams.

The Brake wire is an electrical control signal, not a mechanical brake for holding loads during power loss. Changes to the function or rotation direction should be performed while the motor is stopped.

GGM K35-3640 Series Specifications

GGM KB3640 BLDC Motor Specifications

The values above are for the BLDC motor before integration with the planetary gearhead.

Planetary Gearhead Ratios and Lengths

Length L is the length of the planetary gearhead section. When designing the installation space, account for the 40mm motor length, 4mm rear section, and 19.3mm output shaft.

GGM K35-3640 BLDC Series Model List

Applications of the GGM K35-3640 BLDC Series

The GGM K35-3640 is suitable for drive assemblies requiring speed regulation, feedback signals, and torque up to 12kgf·cm, including:

• Robots and actuators.

• Feeding and dosing units.

• Turntables or low-speed rotating mechanisms.

• Testing and measuring equipment.

• Opening/closing mechanisms in automated machinery.

• Equipment using 12V or 24V DC power.

• Drive assemblies requiring PWM speed control.

• Equipment requiring FG signals for speed monitoring.

• OEM drive assemblies with limited installation space.

Practical suitability should be verified based on voltage, speed, load torque, duty cycle, and control method.

How to Select the GGM K35-3640 BLDC Series

First, determine the power supply:

• Select KB3640S1 for 12V DC power.

• Select KB3640S2 for 24V DC power.

Next, determine the required output speed and select the appropriate gear ratio:

• Ratio 1/5–1/27: prioritize higher output speed.

• Ratio 1/51–1/139: balance between speed and torque.

• Ratio 1/189–1/721: for mechanisms requiring low speed.

The 24V version offers higher torque in low and medium ratio groups. However, power supply capacity, output speed, and load characteristics should be verified for each specific application. For speed control systems, identify the GUN Type controller and the PWM signal method. When speed monitoring is required, the 6 pulse/rev FG signal can be utilized.

Mechanical dimensions to verify before ordering include:

• Gearhead Ø35mm.

• Motor Ø36mm.

• D-cut output shaft Ø6mm.

• Shaft length 19.3 ± 0.5mm.

• Four M3 threaded holes on Ø26mm PCD.

• Gearhead length according to gear ratio.

• Motor length 40mm.

• Wire length 195mm.

Notes for Replacing the GGM K35-3640

When replacing the GGM K35-3640 geared motor, verify the correct model (KB3640S1 or KB3640S2), power voltage, gear ratio code, and six-wire diagram. Do not change the rotation direction or activate the brake function while the motor is running. Function switching should be performed while the motor is stopped. The Brake signal is an electrical braking function and does not replace a mechanical brake used to hold loads during power loss. Different gear ratio groups have different planetary gearhead lengths. Verify length L, shaft dimensions, and mounting hole positions before replacement.

MDriveTech Supplies Genuine GGM K35-3640 BLDC Series

MDriveTech supplies the GGM K35-3640 Series BLDC planetary geared motors, providing support for verifying voltage, motor model, gear ratio, speed, torque, PWM/FG signals, wiring diagrams, and installation dimensions according to actual requirements.

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