RioRand 5pcs Genuine Mini SG90 Micro 9g Servo For 450 RC Helicopter Airplane Car Boat
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- Operating speed: 0.12second/ 60degree ( 4.8V no load)
- Stall Torque (4.8V): 17.5oz /in (1kg/cm)
- Operating voltage: 3.0V~7.2V
- Temperature range: -30 to +60
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Specification: Fit for ALL kind of R/C Toys; Coreless motor; 3 pole wore; All nylon gear; Dual ball bearing; Connector wire length 150mm; Each servo comes with 3 different servo horns and fittings; Package includes: 5x SG90 9g 450 se 7ch torque mini micro Servo 450.
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Orange: PWM signal (500 - 2400us)
I ran into a bit of a problem when two of these servos used to control the ailerons failed on a test flight of one of my planes. The end result was a crash. When I examined the suspect servos with my servo tester I found the small plastic gears on one servo were skipping and the other was jamming. I contacted Hossen about the matter, and though I did not ask for one, they offered to refund half the cost of the servos.
I am not going to bad mouth the product. For whatever reason I seem to have gotten a couple of bad servos. Quality control error? I don't know. Hossen assured me they were going to check into the matter. With all the positive reviews they seem to be pretty good for the price.
Cons: cheap plastic gears
Pros: Quick response from customer service (but very defensive)
Will I buy them again? probably not
Will I suggest them to a friend? I don't think so
Upon dissection of the servo I found the the drive motor only now will rotate in one direction. Appears a a brush is jamming or has fallen out of its holder. These maybe cheap on direction motors not meant to turn in reverse???
YOU HAVE BEEN WARNED! Rest will be E-cycled ASAP.