28GP-2838 Brushless Planetary DC Gear Motor, 12V/24V

28GP-2838 planetary gear motor

28mm brushless planetary DC gear motor with built-in driver, FG speed output and direction/PWM control wires.

Choose your configuration

Select the rated DC voltage and no-load output speed, shaft diameter where offered, and accessory package. Actual speed decreases under load. Accessories are included only when named in the selected package.

Specifications

12V or 24V DC; selectable no-load speeds 9–1200RPM.
Motor/gearbox diameter 28mm; motor section 38mm; gearbox L 23–40mm.
6mm shaft ×15mm projection, 12mm flat and 5.5mm across flat; locating boss 17mm.
Four M3 mounting holes, 7mm deep, on a 22mm pitch circle; cable approximately 250mm.
Approximate motor weight 170–228g, depending on ratio.

Supplier performance data

No-load output RPM	12V torque (kgf.cm)	24V torque (kgf.cm)	Gear ratio	Gearbox L (mm)	Loaded RPM	Motor weight (g)
1200	0.3	0.5	5	23	960	170
375	0.8	1.5	16	29	300	190
240	1.2	2	25	29	192	190
94	3	4.5	64	34.5	75	205
60	5	7	100	34.5	48	205
48	7	8.5	125	34.5	38	205
40	10	12	151	34.5	32	205
19	18	22	320	40	15	228
12	32	35	500	40	9.6	228
9	45	50	688	40	7.2	228

6000RPM motor before gearbox. Loaded current/power: 12V 0.7A/8.4W; 24V 0.6A/14.4W. No-load current 0.15A/0.1A respectively.

Built-in brushless driver and wiring

Wire	Function
Red	Matching 12V/24V DC supply positive
Black	DC supply negative / ground
Yellow	FG speed output, 9 pulses per motor revolution before gearbox
White	Direction input: open and low (≤0.6V) select opposite directions
Blue	VSP/PWM speed input

Never reverse red/black supply polarity. Change direction with the white control wire and stop before reversing. For direct operation without the illustrated controller, connect red to supply positive and black + blue to negative; add white to negative for the opposite direction. Insulate unused wires. Yellow FG is an output, not a power or controller-input wire. Do not apply supply voltage to FG.

The supplier provides no complete PWM frequency/voltage specification for this model. Use a compatible brushless controller and confirm its signal compatibility. The FG speed signal is not a quadrature position encoder. Accessories are included only with the selected package.

Supplier data notes

Dimensions and weights are approximate. Power, current, noise, temperature and continuous-duty figures are supplier-listed; measurement conditions are not fully specified. Where power and current do not agree, confirm actual supply demand rather than assuming the listed wattage is verified electrical input power. Stall torque is a limit, not a continuous operating rating. No waterproof rating is supplied.

Package contents

One motor in the selected configuration, plus only the accessories named in the Package option. Power supply and speed controller are not included with Motor Only. Plug type and full controller ratings are not specified.