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Item Type: Gear Motor
Material: Zinc Alloy Shell
Model: JGY 370
Rated Voltage: 12V
Bearing: Single shaft length approx. 12mm/0.47in
Output Torsion: 25kg.cm
How to Use:
Installed on corresponding equipment.
PackageList:
1 x Gear Motor
1 x Fixing Base
4 x Screw
Espoir
2025-06-06 17:48:54
This gear reduction motor is surprisingly well-made internally. It runs almost silently at low speeds around 1-3 volts and at higher speeds near the rated 12v most of the sound comes from the motor whine without any excessive gear train noise.The can-style DC motor has very little magnetic cogging and it self-starts even at 1-2 volts DC under no load. If you have a low-speed high-torque application the use a suitable PWM or torque-sensing driver that senses back-EMF is recommended.Starting at the motor end the gear train consists of a brass worm gear and matching brass worm wheel followed by a series of steel spur gears for the subsequent stages of speed reduction.The main double-ended shaft uses what possibly looks like sintered-metal sleeve bearings pressed into the zinc-alloy housing. I would have preferred to see ball bearings here instead, but given that the main shaft rotates at a relatively low speed the metal bushings may be fine. Nevertheless for continuous-duty use it might be best to avoid too much side load to the shaft, such as a belt under tension would apply. Using a flexible coupling to connect the motor shaft to a pulley shaft that is fully supported by ball bearings would help isolate any side load from the gearbox bearings.The mounting bracket is made of zinc-plated 3mm thick steel and is almost overkill for the application. The shaft length is 14mm on the side opposite the mounting bosses. The exposed shaft length on the mounting boss side when using the included bracket is 11mm.This motor does not have replaceable brushes. It also uses a conventional steel-cored armature (not coreless) so some coasting or positional overshoot should be expected when attempting to stop from a high speed. For more precise high-speed movements dynamic braking can stop the motor very abruptly.Overall this appears to be a low-price, high-quality project motor for intermittent-duty use.
Eric Mockler
2024-11-24 11:20:00
I'm using this to move a fan so it aims in all directions. I know they make these, I had one that eventually broke and I wasn't happy with the speeds available, so this gives me more control and will hopefully last longer. I'm using another similar one in a cigarette tube filling machine I built and expect this one to perform similar to that. It changes direction with micro switches, I had to add 2 together, I find it hard to source a DPST switch in a small package. One application was for the advantage provided by the gearing, the other is for the voltage adjustable speed. So this is a very versatile motor that is appropriate for various DIY applications.
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