FEETECH 21KG High Torque High Voltage Digital Servo FT5121M
The FT5121M is a standard-size digital servo from FEETECH that is capable of delivering extra-high torque normally associated with more expensive or larger servos thanks to its powerful coreless motor and an all-metal gear train. The output shaft is supported by two ball bearings for reduced friction. The FT5121M is a high-voltage servo, offering an operating voltage range of 6 V to 7.4 V. Servo horns and associated hardware are included.
Key specs at 7.4 V: 0.12 sec/60°, 285 oz-in (20.5 kg-cm), 60 g.
Overview
The FT5121M is a standard-size digital servo from FEETECH that can deliver over three times the torque of our standard-size servos with plastic gears thanks to its powerful coreless motor and all-metal gear train (if you need even more torque than this, check out the larger FT5335M giant servo, which can deliver 550 oz-in at 7.4 V, and if you need more speed in a servo with the same dimensions as the FT5121M, consider the FT5313M). The output shaft is supported by two ball bearings for reduced friction.
The FT5121M works with standard RC servo pulses, providing a running angle of approximately 120° over a servo pulse range of 900 µs to 2100 µs. Many hobby servos can be operated beyond their standard ranges by using a wider pulse range, but please note that in our tests, we were not able to expand the range of the FT5121M significantly beyond 120° (the servo did not respond to pulses below around 800 µs or above around 2100 µs, providing an approximate expanded range of 135°).
This servo has a 10″ (25 cm) cable that is terminated with a standard JR-style connector, which is Futaba-compatible. Unlike typical hobby servos, the FT5121M has an operating voltage of 6 V to 7.4 V.
Dimension
| Size: | 40.5 × 20.5.× 37.5 mm |
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| Weight: | 60 g |
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General specifications
| Digital?: | Y |
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| Speed @ 7.4V: | 0.12 sec/60° |
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| Stall torque @ 7.4V: | 20.5 kg·cm |
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| Speed @ 6V: | 0.15 sec/60° |
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| Stall torque @ 6V: | 17.5 kg·cm |
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| Lead length: | 10 in |
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| Hardware included?: | Y |
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What are the three wires coming out of my servo?
Most standard radio control servos (and all RC servos we sell) have three wires, each a different color. Usually, they are either black, red, and white, or they are brown, red, and orange/yellow:
- brown or black = ground (GND, battery negative terminal)
- red = servo power (Vservo, battery positive terminal)
- orange, yellow, white, or blue = servo control signal line
Please check the specs for your servo to determine the proper power supply voltage, and please take care to plug the servo into your device in the proper orientation (plugging it in backwards could break the servo or your device).
How many degrees can this servo turn? Why do you not list it with the other specifications?
We do not specify the range of rotation of our servos because this information is not generally available from servo manufacturers. RC servos are usually intended for controlling things like the steering mechanism in an RC car or the flaps on an RC plane. Manufacturers make sure that the range is enough for these typical applications, but they do not guarantee performance over a wider range.
This means most RC servos will rotate about 90° using the standard 1-2 ms pulse range used by most RC receivers. However, if you are using a controller capable of sending a wider range of pulses, many servos can rotate through almost 180°.
You can find a servo's limits if you use a servo controller that can send pulses outside of the standard range (such as ourMaestro servo controllers). To find the limits, use the lowest possible supply voltage at which the servo moves, and gradually increase or decrease the pulse width until the servo does not move any further or you hear the servo straining. Once the limit is reached, immediately move away from it to avoid damaging the servo, and configure your controller to never go past the limit.
You might be wondering why we do not just follow the above steps for all the servos we carry and list a specification for degrees of rotation. Unfortunately, since servo manufacturers do not specify the range of rotation, it might change from one manufacturing run to the next. They will not inform us about changes that are not specified, and we have no way of knowing if or when they might change their manufacturing process.
Packaging & Shipping
Packing
-Servo×1pc
-Servo accessories x 1bag
-Plastic Box in standard exporter carton
Shipping
Generally, shipping by air express(such as DHL, FedEx, EMS, UPS or TNT and so on) according to your requirements. Freight Collect is also available.
Tracking
We will keep you updated with the tracking no. as soon as possible.
Our ServicesOur Quality:
Quality is the life of Honesty. We use only the best quality (original) components to ensure the standard of our product range is of the highest caliber.
All products we sold out are strictly selected and tested by our QC department.
Warranty:
We provide a 1-year warranty for all of our products.
Payment:
We accept payment via TT (Bank transfer), Paypal, Western Union and etc.
We accept bank transfer for large orders. For small order, you'd better pay Paypal.
Import taxes:
When you import products from another country, there is always the possibility of paying import taxes. We can help you reduce and avoid import taxes by declaring prices low, declaring the contents as "gift" or other items and shipping in simple packaging.
Do you have any questions? Contact me now! We look forward to cooperating with you!
