CHIHAI CHF-GM3865-520 DC Gear Motor

Overview

The CHIHAI MOTOR CHF-GM3865-520 is a permanent-magnet brushed DC gear motor with a flat metal gearbox and 6 mm D-shaped output shaft. Select the motor winding,nominal ratio and accessory package. Available selections use a forward output shaft;the reverse-side installation and encoder-equipped illustrations below are mounting references.

Features

Metal reduction gears in an L-shaped assembly.
6 mm D-shaft with 23.5 mm projection and 12 mm flat-length references.
6V0630,12V1260 and 24V motor selections where available.
Optional bracket,PWM/digital/reversing controllers,power supply,gear or flange-coupler packages.

Specifications

Specification	Value / scope
Brand/model	CHIHAI MOTOR CHF-GM3865-520 permanent-magnet brushed DC gearmotor
Selectable windings	6V0630,12V1260 and 24V;check actual retained package/ratio combination
Selected output configuration	Forward output shaft;reverse-side illustration is a separate mounting reference
Nominal ratio options	42:1,67:1,125:1,225:1,450:1
Body reference	L-shaped38×64.5×40 mm
Gearbox drawing envelope	38±0.3×64.4±0.3 mm
Output shaft	6 mm diameter;5.4(+0/−0.1)mm D-flat;23.5±0.5 mm projection;12 mm flat length
Mounting references	Four M3 rear mounting-hole callout;4×3.1 and 4×3.3 mm drawing apertures;26.5±0.3×50±0.3 mm hole-pattern references
Other drawing references	12 mm register;3 mm step;1.70 mm shoulder reference;31 mm motor-axis offset;33 mm motor diameter;7.5 mm rear register;0.5/3/6.5/22.5/11.80 mm axial references
Motor weight	Approximately165 g;varies by ratio
Gear construction	Metal reduction gears
Bracket	Carbon steel,black coated;approximately 53 g with mounting screws
Bracket drawing	64.3 mm width;43.5 mm upright;20.7 mm base;2 mm thickness;49.8 mm hole spacing;26.4/11.4/7.2 mm references;14.5 mm apertures;four3.1 mm holes;3.2/14/9.2/8 mm base references
PWM controller reference	2.2–12V DC input for the illustrated small controller;not a 24V controller
Wheel/gear/coupler dimensions	Use the pictured package and actual fit;no unsupported tooth count,bore or pitch supplied

Performance by Winding

The nominal 67:1 selector corresponds to the 67.5:1 table reference. Keep each winding's current,speed and torque data separate. The24V2473 table instead lists135:1 in its third column;that column is a separate reference and must not be assigned to the selectable 125:1 option. The24V selection itself does not state a winding code. The6V0660 and 3V0330 tables are additional family references,not selectable windings here.

6V0630

Maximum power reference 0.6W;no-load current ≤50mA.

Table ratio	No-load rpm	Rated torque(kgf·cm)	Rated rpm	Rated current(A)	Stall current(A)	Stall torque / limit(kgf·cm)
42:1	75	1.00	47	≤0.35	≤0.85	≥2.5
67.5:1	46	1.50	30	≤0.35	≤0.85	≥4.0
125:1	25	3.00	16	≤0.35	≤0.85	≥7.0
225:1	14	5.50	8	≤0.35	≤0.85	≥12.0
450:1	7	10.00	4.5	≤0.35	≤0.85	≥22.0

12V1260

Maximum power reference 2.3W;no-load current ≤65mA.

Table ratio	No-load rpm	Rated torque(kgf·cm)	Rated rpm	Rated current(A)	Stall current(A)	Stall torque / limit(kgf·cm)
42:1	150	2.00	95	≤0.7	≤1.7	≥5.0
67.5:1	92	3.00	60	≤0.7	≤1.7	≥8.0
125:1	50	6.00	32	≤0.7	≤1.7	≥14.0
225:1	28	11.00	17	≤0.7	≤1.7	Maximum25
450:1	14	20.00	9	≤0.7	≤1.7	Maximum25

24V2473 reference

Maximum power reference 3.0W;no-load current ≤100mA.

Table ratio	No-load rpm	Rated torque(kgf·cm)	Rated rpm	Rated current(A)	Stall current(A)	Stall torque / limit(kgf·cm)
42:1	170	2.0	105	≤0.35	≤1.30	≥5.0
67.5:1	105	3.0	65	≤0.35	≤1.30	≥8.0
135:1	54	6.0	33	≤0.35	≤1.30	≥15.0
225:1	32	11.0	21	≤0.35	≤1.30	Maximum25
450:1	16	20.0	10	≤0.35	≤1.30	Maximum25

Additional 24V rated-torque references in N·m:0.2,0.3,0.6,1.1,2.0 in the same column order.

6V0660 series reference

Maximum power reference 1.7W;no-load current ≤100mA.

Table ratio	No-load rpm	Rated torque(kgf·cm)	Rated rpm	Rated current(A)	Stall current(A)	Stall torque / limit(kgf·cm)
42:1	150	2.00	75	≤0.7	≤2.4	≥5.0
67.5:1	92	3.00	45	≤0.7	≤2.4	≥8.0
125:1	50	6.00	25	≤0.7	≤2.4	≥14.0
225:1	28	11.00	14	≤0.7	≤2.4	Maximum25
450:1	14	20.00	7	≤0.7	≤2.4	Maximum25

3V0330 series reference

Maximum power reference 0.5W;no-load current ≤50mA.

Table ratio	No-load rpm	Rated torque(kgf·cm)	Rated rpm	Rated current(A)	Stall current(A)	Stall torque / limit(kgf·cm)
42:1	75	1.00	37	≤0.35	≤1.2	≥2.5
67.5:1	46	1.50	23	≤0.35	≤1.2	≥4.0
125:1	25	3.00	12	≤0.35	≤1.2	≥7.0
225:1	14	5.50	7	≤0.35	≤1.2	≥12.0
450:1	7	10.00	4	≤0.35	≤1.2	≥22.0

Maximum-power figures describe separate operating points,not continuous rated output for every ratio. For the 12V1260,24V2473 and 6V0660 high-ratio tables,the merged25 kgf·cm cells state a maximum permissible gearbox load,not guaranteed stall torque. Avoid prolonged stalling,overload and repeated reversing starts.

Mounting and Controller Selection

Check the complete drawing and actual package before installation. The nominal 38×64.5×40 mm envelope and precise38±0.3×64.4±0.3 mm gearbox drawing are distinct references. Confirm shaft,front/rear mounting interfaces and bracket clearance. Multiple bracket mounting positions are illustrated. The two-motor drawings show approximately 95 mm width for opposed same-axis mounting or approximately 48 mm width and 105 mm height for offset mounting. These are multi-motor layout references;each product selection includes one motor. Encoder-equipped reference photos do not add an encoder to the selected motor.

Use DC voltage matching the selected winding. The pictured small PWM board has a 2.2–12V DC input reference and must never be connected directly to 220V AC. It is not specified for 24V operation. Check polarity at the controller's supply input and follow its actual terminal markings. Match digital and reversing controller ratings to the actual supply,motor current and load before wiring.

Power-supply packages:the package photographs identify a 12V adapter,including shared photographs used for 6V selections. Do not connect12V directly to a 6V motor. A6V selection needs a correctly rated6V supply or a verified voltage-control arrangement. A speed-controller package name alone does not confirm voltage conversion or a safe6V motor setting. Check the supplied adapter output and controller arrangement before use.

Applications

Compatible smart kitchen mechanisms,small rotating barbecue racks,sunshade mechanisms and smart-curtain drives. Check required load,ratio,supply and mechanical fit. Speed changes with load;avoid stalled or overloaded operation.

What's Included

Selected package	Contents
Motor Only	1 motor
Motor + Mounting Bracket	1 motor,1 bracket and mounting screws
Motor + PWM Speed Controller	1 motor and 1 small PWM controller
Motor + Bracket + PWM Controller	1 motor,1 bracket with screws and 1 small PWM controller
Motor + 12V Supply + Bracket	1 motor,1 bracket with screws and 1 pictured12V power-supply assembly
Motor + 12V Supply + PWM Controller + Bracket	1 motor,1 bracket with screws,1 pictured12V supply and 1 small PWM controller
Motor + 12V Supply + Forward/Reverse Controller	1 motor,1 pictured12V supply and 1 forward/reverse controller assembly
Motor + Digital Speed Controller + Bracket	1 motor,1 bracket with screws and 1 digital speed-controller assembly
Motor + Bracket + Large Gear	1 motor,1 bracket with screws and 1 large gear
Motor + Bracket + Flange Coupler	1 motor,1 bracket with screws and 1 flange coupler with shown fastening hardware

Only the selected package's accessories are included. A motor-only selection does not include a bracket,controller,power adapter,encoder,large gear or flange coupler. Photo labels are shared package references;the actual motor winding and ratio follow the selected option.

FAQ

Can the 12V adapter be connected directly to a 6V motor?

No. Match the motor voltage using a correct 6V supply or a verified voltage-control arrangement. Confirm the actual controller settings and output before connection.

Does this listing include the reverse-side shaft or an encoder?

The selectable shaft orientation is forward. Reverse-side and encoder-equipped photos are installation references and do not change the selected configuration.