JGB37-545 DC Gear Motor | 12V/24V, 7–952 RPM

JGB37-545 Brushed DC Gear Motor

The JGB37-545 is a compact brushed DC gear motor with a metal reduction gearbox, a 6mm D-shaped output shaft and reversible rotation. Choose a 12V or 24V motor, the required no-load output speed, and a motor-only or accessory package for robotics, small mechanisms and electronics projects.

The selectable speeds are 7, 12, 22, 36, 46, 67, 107, 200, 316, 600 and 952 RPM. These options match the supplier's 6000RPM motor-before-reduction series. Output RPM is measured without load; speed decreases under load. A bracket shown in a photograph is included only when the selected Package names a bracket.

Construction and Speed Control

Metal reduction gears in a multi-stage arrangement, copper winding, permanent-magnet motor and carbon brushes.
PWM speed control is possible with a compatible external brushed-DC controller. A controller is included only in the specified packages.
For the bare two-terminal motor, reversing motor-lead polarity reverses rotation. With a controller fitted, use its direction control and keep controller supply polarity correct.
The gear ratio determines the speed/torque trade-off. Reducing speed electrically does not provide the same torque increase as selecting a higher reduction ratio.

Mechanical Specifications

Parameter	Specification
Brand / model	Jiali Motor / JGB37-545
Motor type	Brushed DC gear motor; no encoder specified
Rated supply	12V DC or 24V DC, according to selected variant
No-load speed before reduction	6000RPM
Gearbox diameter	37mm
Motor body	50mm section length; 36mm housing / approximately 37mm at the outer sleeve; sleeve length marked 28mm
Gearbox length L	19–29mm, depending on reduction ratio
Output shaft	6mm diameter, 15.5mm projection; 12mm flat length; 5.5mm across flat
Shaft diameter tolerance	−0.03 / −0.05mm, as marked on the drawing
Locating boss	12mm diameter × 6mm height
Front mounting	Six M3 threaded holes, 4mm deep, on a 31mm pitch circle
Additional front drawing references	Three 4mm features; reference offsets marked 7mm and 15.8mm
Rear drawing references	13mm boss × 4mm projection; 7mm terminal projection; rear view also marks diameters 35.8mm and 10.2mm and offsets 3.8mm / 6.2mm
Terminal spacing	27.4mm in the annotated photograph; 27.5mm in the drawing
Reduction ratio	6.3:1–810:1
Motor-only weight	Approximately 260–290g according to ratio; overview states approximately 290g
Rated current / power	12V: 1.2A / 14.4W; 24V: 0.9A / 21.6W, per supplier performance table
Supplier operating claims	−10°C to 70°C; overview lists 24-hour use. Actual duty suitability depends on load and cooling.
Noise	Supplier states approximately 55dB, varying with speed and load; measurement conditions are not specified

Dimensions are supplier reference measurements and may vary. The 27.4mm / 27.5mm terminal-spacing difference is retained from the two source illustrations. Motor appearance and components can differ between versions. No encoder, controller input-frequency specification or closed-loop positioning function is specified.

Performance by Voltage and Gear Ratio

Output speeds below are no-load speeds. Loaded speeds and torque are listed at the supplier maximum-efficiency operating point. Values are supplier data, not independent test results. Torque is in kgf·cm, not kilograms of lifting capacity. Stall values are limits, not continuous operating ratings.

12V — 6000RPM Before Reduction

Ratio	Gearbox L (mm)	No-load RPM	No-load current (A)	Loaded RPM	Torque at max. efficiency (kgf·cm)	Loaded current (A)	Power (W)	Stall torque (kgf·cm)	Stall current (A)	Stall power (W)	Motor weight (g)
6.3	19	952	0.26	768	0.6	1.2	14.4	2	3.8	45.6	260
10	19	600	0.26	480	1	1.2	14.4	4.2	3.8	45.6	260
19	22	316	0.26	252	1.6	1.2	14.4	8	3.8	45.6	265
30	22	200	0.26	160	3	1.2	14.4	12	3.8	45.6	265
56	24	107	0.26	86	5	1.2	14.4	18	3.8	45.6	270
90	24	67	0.26	54	8	1.2	14.4	25	3.8	45.6	270
131	26.5	46	0.26	37	13	1.2	14.4	30	3.8	45.6	280
168	26.5	36	0.26	29	17	1.2	14.4	35	3.8	45.6	280
270	26.5	22	0.26	17	22	1.2	14.4	40	3.8	45.6	280
506	29	12	0.26	9.6	28	1.2	14.4	50	3.8	45.6	290
810	29	7	0.26	5.5	35	1.2	14.4	60	3.8	45.6	290

24V — 6000RPM Before Reduction

Ratio	Gearbox L (mm)	No-load RPM	No-load current (A)	Loaded RPM	Torque at max. efficiency (kgf·cm)	Loaded current (A)	Power (W)	Stall torque (kgf·cm)	Stall current (A)	Stall power (W)	Motor weight (g)
6.3	19	952	0.12	768	0.8	0.9	21.6	3	3	72	260
10	19	600	0.12	480	1.2	0.9	21.6	5	3	72	260
19	22	316	0.12	252	1.8	0.9	21.6	10	3	72	265
30	22	200	0.12	160	3.5	0.9	21.6	15	3	72	265
56	24	107	0.12	86	5.5	0.9	21.6	20	3	72	270
90	24	67	0.12	54	8.5	0.9	21.6	25	3	72	270
131	26.5	46	0.12	37	14	0.9	21.6	30	3	72	280
168	26.5	36	0.12	29	18	0.9	21.6	35	3	72	280
270	26.5	22	0.12	17	25	0.9	21.6	40	3	72	280
506	29	12	0.12	9.6	30	0.9	21.6	50	3	72	290
810	29	7	0.12	5.5	35	0.9	21.6	60	3	72	290

Optional Mounting Bracket

The illustrated L-bracket is 1.5mm thick, approximately 40mm wide, with a 40mm base and 47mm upright. The motor mounting pattern is marked 31mm pitch diameter with six 3.2mm holes and 6.3mm recesses. The central opening is marked 2 × R6.5 with 14mm centre spacing. The base drawing shows four 3.5mm holes at 24 × 30mm spacing and an 8mm side offset; the upright includes a 20mm reference dimension. The bracket is supplied only with the applicable Package.

Wiring and Use

Use a DC supply matching the selected motor voltage. In the illustrated controller arrangement, connect the supply to the controller's power input with correct polarity, and connect the controller motor output to the two motor terminals. The illustration shows red positive and black negative motor leads, a speed knob, a reversing switch and a supply adapter connection. Confirm actual terminal labels before powering on. Never reverse the controller's power input to reverse the motor, and stop the motor before changing direction.

Choose the motor by its rated-load torque rather than its stall torque. Do not overload, stall or operate close to stall: the motor or gears can be damaged. Loads above the rated condition reduce speed. Lowering electrical speed can also reduce available torque. Controller ratings, adapter mains-input rating, plug type and included cable/connector details are not fully specified in the supplied listing; verify these details for the selected accessories.

Torque and Unit Reference

For a static load, required torque in kgf·cm equals load in kgf multiplied by lever radius in cm. The supplier illustrates a 10kg load: 10kgf·cm at a 1cm radius, or 100kgf·cm at a 10cm radius. This is an explanatory example, not this motor's lifting rating. Allow for friction, acceleration and the mechanism's actual operating load.

gf·cm	kgf·cm	N·m	mN·m	N·cm
1	0.001	9.8e-05	0.098	0.0098
1000	1	0.098	98	9.8
10204.08	10.204	1	1000	100
10.2	0.01	0.001	1	0.1
102.04	0.102	0.01	10	1

Package Contents

One JGB37-545 motor in the selected voltage and speed, plus only the accessories named in the Package option:

Motor Only
Motor + Bracket
Motor + Speed Controller
Motor + Power Supply
Motor + Bracket + Speed Controller
Motor + Bracket + Power Supply
Motor + Speed Controller + Power Supply
Motor + Bracket + Speed Controller + Power Supply

Motor Only does not include a bracket, speed controller or power supply. Product and accessory illustrations are reference views.

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JGB37-545 DC Gear Motor, 12V/24V, 7–952 RPM, 37mm Metal Gearbox and 6mm D-Shaft