42GP-775 Planetary DC Gear Motor with Hall Encoder, 12V/24V

42GP-775 with incremental Hall encoder

This Jiali Motor 42GP-775 planetary gear motor includes a rear-mounted Hall encoder and detachable six-wire harness for rotation feedback. It is a separate product from the motor-only 42GP-775 without an encoder. Both selectable motor voltages and all packages in this listing include the encoder-equipped motor.

Choose your configuration

Select the rated DC voltage and no-load output speed, output shaft diameter, and accessory package. Actual speed decreases under load. Package names specify exactly which accessories are included.

Specifications

Motor supply: 12V DC or 24V DC according to variant; no-load output speeds 8-1600 RPM.
Output shaft choices: 8 mm or 10 mm.
Illustrated 8 mm shaft: 20 mm projection, 12 mm flat length, 7 mm across flat. Detailed 10 mm shaft length and flat dimensions are not provided.
Gearbox diameter: 42 mm; motor body maximum diameter approximately 44 mm.
Motor section: 66 mm; gearbox L: 31.2-63.6 mm depending on ratio. The encoder extends behind the motor section.
Front mounting: four M4 threaded holes on a 35 mm pitch circle; locating boss diameter 26 mm.
Supplier approximate weights: 600-790 g depending on ratio, excluding accessories.
12V motor: no-load current 0.5A; listed loaded current 3.2A; power 38.4W.
24V motor: no-load current 0.3A; listed loaded current 2A; power 48W.

Encoder and pinout

The illustrated incremental magnetic Hall encoder provides A and B square-wave outputs with a stated 90-degree phase separation. Each channel generates 20 pulses per motor revolution before the gearbox. Pulses per gearbox output revolution therefore depend on the reduction ratio and the counting method. The supplied six-wire pinout documents two output channels.

Encoder power is separate: the Hall sensor requires 5-12V DC. Never apply the motor's 24V supply to the encoder Vcc connection. Connector pitch is listed as 2.54 mm.

Pin	Wire color	Connection
1	Red	Motor +
2	Black	Motor -
3	Green	Hall sensor GND
4	Blue	Hall sensor Vcc: +5-12V DC
5	Yellow	Channel A output
6	White	Channel B output

The source describes square wave as the standard output and sine wave as a custom request. This listing follows the illustrated A/B square-wave version. Its waveform sketch labels a half-period shift despite the written 90-degree specification; the English specifications follow the written 90-degree quadrature relationship.

Performance data

Supplier maximum-efficiency / loaded data. The 23 and 43 RPM rows are reference configurations and are not selectable sale options. Weights are supplier approximations for this listing.

No-load RPM	Loaded RPM 12V	Torque 12V (kgf.cm)	Loaded RPM 24V	Torque 24V (kgf.cm)	Ratio	Gearbox L (mm)	Weight (g)
1600	1300	1.3	1300	1.3	3.7	31.2	600
1160	950	1.9	950	2.3	5.78	31.2	600
440	335	3.8	377	6	13.7	42	685
310	260	7	260	8.4	19	42	685
220	180	10	180	12	27	42	685
120	95	13.8	100	20	51	52.8	765
85	66.5	24	72	30	71	52.8	765
60	46	32	46	44	99.5	52.8	765
43	35	45	35	57	139	52.8	765
32	26	61	29	66	188.6	63.6	790
23	18	85	18	92	263.7	63.6	790
16	13	120	13	130	368.8	63.6	790
12	10	168	10	180	515.6	63.6	790
8	6.8	235	6.8	253	721	63.6	790

The dimension drawing gives 5.18 for the second ratio, while the performance tables give 5.78; other ratios are rounded in the drawing. Select by voltage and RPM, and confirm the exact ratio if critical.

Wiring and operation

Use a DC supply matching the selected motor voltage. Do not connect the motor directly to household AC. Reversing the motor leads changes rotation direction; a compatible controller can provide speed and direction control. Electronic speed reduction may reduce available torque. Select using loaded operating figures and avoid overload or stalled operation.

Power-supply plug type, input range and controller electrical ratings are not specified in the source. The optional speed controller is not described as a closed-loop position controller. Confirm compatibility for your installation.

Change direction only through the motor leads or a compatible motor controller. Keep the encoder supply and signal pin connections as specified above.

Package contents

One 42GP-775 With Encoder gear motor in the selected configuration, plus only the bracket, speed controller and/or power supply named in the selected Package option. Accessories pictured are included only when listed in that package.