FEETECH High-Torque, High-Voltage Digital Servo FT5121M
Available with a lead time
Expect dispatch between Feb 27 and Mar 03
Quantity Discounts:
- 6-12 $78.44 (exc GST)
- 12+ $76.82 (exc GST)
The FT5121M is a standard-size digital servo from FEETECH that can deliver over three times the torque of Pololu's 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 Pololu's tests, Pololu 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. You can find more information about this servo in its datasheet (123k pdf).
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This servo is also compatible with Pololu's Mounting Bracket for Standard-Size Servos:
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The picture below shows the all-metal gear train that helps the servo deliver such high torque:
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Note that, as with most hobby servos, stalling or back-driving this servo can damage it. This servo can draw bursts of current in excess of 5 A at 7.4 V, so please make sure you have an appropriate power supply. For comparison, a typical standard-size servo might draw around an amp when straining.
People often buy this product together with:
 | Micro Maestro 6-Channel USB Servo Controller (Assembled) |
 | Mounting Bracket for Standard-Size Servos |
 | FEETECH High-Torque Servo FS5115M-FB with Position Feedback |
Dimensions
| Size: | 40.5 × 20.5.× 37.5 mm |
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| Weight: | 60 g |
General specifications
| Digital?: | Y |
|---|---|
| Speed @ 7.4V: | 0.12 sec/60° |
| Stall torque @ 7.4V: | 20.5 kg·cm |
| Speed @ 6V: | 0.15 sec/60° |
| Stall torque @ 6V: | 17.5 kg·cm |
| Hardware included?: | Y |
| Lead length: | 10 in |
File downloads
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We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):
- $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
- $7+ for Standard Post (typically 6+ business days, tracked)
- $11+ for Express Post (typically 2+ business days, tracked)
- Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.
Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
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International Orders - the following rates are for New Zealand and will vary for other countries:
- $12+ for Pack and Track (3+ days, tracked)
- $16+ for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
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