GGM K30-2847 – Ø30mm DC Planetary Geared Motor

GGM K30-2847 Series Planetary Geared Motor

The GGM K30-2847 Series is a DC Planetary Geared Motor line combining the KD2847 DC motor with a coaxial planetary gearbox. The gearhead has an outer diameter of Ø30mm, a Ø6mm D-cut output shaft, and four M3 threaded holes, making it suitable for drive assemblies requiring higher torque than the GGM Ø22mm planetary geared motor group.

The series offers two motor options: KD2847T1 DC 12V and KD2847T2 DC 24V. Each motor can be paired with 13 gear ratios from 1/5 to 1/721, resulting in 26 model combinations based on power supply, speed, and output torque.

Key Features of the GGM K30-2847 Series

Planetary Gearhead Ø30mm

The GGM K30-2847 utilizes a planetary gearhead with an outer diameter of Ø30mm. The output shaft has a diameter of Ø6mm, machined with a D-cut profile featuring a 5.5mm flat section.

The shaft extension length is 18.3 ± 0.5mm. The front face of the gearhead includes four M3 threaded holes with a thread depth of 4mm, arranged on a PCD of Ø24mm.

Two DC 12V and 24V Motor Options

The series uses two motor models:

• KD2847T1: 12V DC voltage.

• KD2847T2: 24V DC voltage.

Both motors feature a no-load speed of 7,300 rpm and a speed at maximum efficiency of 6,300 rpm. The 24V version has a lower current but a higher rated motor torque compared to the 12V version.

13 Gear Ratios

The GGM K30-2847 provides 13 gear ratios:

• 1/5

• 1/14

• 1/19

• 1/27

• 1/51

• 1/71

• 1/100

• 1/139

• 1/189

• 1/264

• 1/369

• 1/516

• 1/721

The output speed at maximum efficiency varies from 1,260 rpm at a 1/5 ratio down to 8.7 rpm at a 1/721 ratio.

Output Torque up to 12kgf·cm

The torque at maximum efficiency increases with the gear ratio, reaching a limit of 12kgf·cm in high-ratio configurations.

Selection should not be based solely on maximum torque. It is necessary to simultaneously verify output speed, duty cycle, starting load, and gearhead dimensions.

GGM K30-2847 Series Specifications

GGM KD2847 Motor Specifications

Stall parameters are data at the locked-rotor state, not for continuous operation.

Gear Ratio and Planetary Gearhead Length

Length L is the length of the planetary gearhead section. When designing the mounting position, include the 46.6mm motor length and the 18.3mm output shaft section.

Output Speed and Torque at Maximum Efficiency

The values above are the output speed and torque at the maximum efficiency point for each motor and planetary gearhead combination.

GGM K30-2847 Series Model List

How to Read the GGM K30-0100-KD2847T2 Code

When requesting a quote, please provide the full gear ratio code and motor code.

Examples:

• K30-0005-KD2847T1: 1/5 gear ratio, KD2847T1 DC 12V motor.

• K30-0100-KD2847T2: 1/100 gear ratio, KD2847T2 DC 24V motor.

• K30-0721-KD2847T1: 1/721 gear ratio, KD2847T1 DC 12V motor.

Applications of the GGM K30-2847 Series

The GGM K30-2847 Series is suitable for DC drive assemblies requiring higher torque than mini planetary geared motors, including:

• Robots and actuators.

• Feeding and dosing units.

• Opening and closing mechanisms in automation equipment.

• Turntables and low-speed rotating mechanisms.

• Testing and measurement equipment.

• Machines using DC 12V or 24V power sources.

• OEM drive assemblies requiring a Ø6mm D-cut shaft.

• Mechanisms requiring low speed and torque up to 12kgf·cm.

Practical application capability should be verified based on supply voltage, load torque, output speed, operating time, and mounting method.

How to Select the GGM K30-2847 Series

First, determine the power source:

• Select KD2847T1 when using a DC 12V source.

• Select KD2847T2 when using a DC 24V source.

Next, determine the required output speed and select the appropriate gear ratio. Ratios from 1/5 to 1/27 are suitable for applications requiring relatively high output speeds. The 1/51 to 1/139 group is suitable for balancing speed and torque. Ratios from 1/189 to 1/721 are suitable for mechanisms requiring lower speeds.

In addition to speed, check the load torque, power supply current capacity, operating time, starting frequency, and reversing requirements.

Mechanical dimensions to check before ordering include:

• Gearhead diameter Ø30mm.

• Output shaft D-cut Ø6mm.

• Shaft length 18.3 ± 0.5mm.

• Four M3 threaded holes on a PCD of Ø24mm.

• Gearhead length according to gear ratio.

• Motor diameter Ø27.8mm.

• Motor length 46.6mm.

Notes on Replacing the GGM K30-2847

When replacing a GGM K30-2847 geared motor, verify the correct KD2847T1 or KD2847T2 model, supply voltage, and the gear ratio code currently in use.

Gear ratio groups have different planetary gearhead lengths. Therefore, compare length L, shaft diameter, D-cut dimensions, and the position of the four mounting holes before replacement.

Do not use the stall torque in the motor table as continuous operating torque. The gearhead output shaft rotates in the same direction as the motor as noted in the catalog.

MDriveTech Supplies Genuine GGM K30-2847 Series

MDriveTech supplies the GGM K30-2847 Series planetary geared motors, supporting verification of voltage, motor model, gear ratio, speed, torque, and mounting dimensions according to actual requirements.