# FEETECH High-Torque, High-Voltage Digital Servo FT5121M **Type:** Product page · **SKU:** POLOLU-3427 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/feetech-high-torque-high-voltage-digital-servo-ft5121m.html ([markdown](https://core-electronics.com.au/feetech-high-torque-high-voltage-digital-servo-ft5121m.html.md)) The FT5121M is a standard-size digital servo from FEETECH that is capable of delivering extra-high torque normally associated with more expensive or... ## Pricing - **Price:** $164.95 (inc GST) — $149.95 AUD, exc GST - **Quantity discounts:** 5+ $143.95 (exc GST) · 10+ $139.45 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 17 and Aug 20. ## Description 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](https://core-electronics.com.au/feetech-ultra-high-torque-high-voltage-digital-giant-servo-ft5335m.html), 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](https://core-electronics.com.au/feetech-high-torque-digital-servo-ft5313m.html)). 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](https://core-electronics.com.au/jr-connector-pack-female.html), 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). | \| [![](https://core-electronics.com.au/attachments/localcontent/0J7699_1400727d771.jpg)](https://core-electronics.com.au/attachments/localcontent/0J7699_12106677ddb.jpg) \| \|---\| \| The servo cable is terminated with a Futaba-compatible JR-style connector. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J8289_30988137ef3.jpg)](https://core-electronics.com.au/attachments/localcontent/0J8289_1247583bd64.jpg) \| \|---\|---\| \| FEETECH High-Torque, High-Voltage Digital Servo FT5121M with included hardware (actual hardware might vary). \| | |---| This servo is also compatible with Pololu's [Mounting Bracket for Standard-Size Servos](https://core-electronics.com.au/mounting-bracket-for-standard-size-servos.html): | [![](https://core-electronics.com.au/attachments/localcontent/0J9430_199093972af.jpg)](https://core-electronics.com.au/attachments/localcontent/0J9430_5358682e364.jpg) | |---| The picture below shows the all-metal gear train that helps the servo deliver such high torque: | \| [![](https://core-electronics.com.au/attachments/localcontent/0J8296_3466647d7f0.jpg)](https://core-electronics.com.au/attachments/localcontent/0J8296_174753752f9.jpg) \| \|---\| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J8291_17032a47925.jpg)](https://core-electronics.com.au/attachments/localcontent/0J8291_646175c2fab.jpg) \| \|---\|---\| | |---| 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)](https://core-electronics.com.au/attachments/localcontent/0J1951_59595b5951.jpg)](https://core-electronics.com.au/micro-maestro-6-channel-usb-servo-controller-assembled.html) | [Micro Maestro 6-Channel USB Servo Controller (Assembled)](https://core-electronics.com.au/micro-maestro-6-channel-usb-servo-controller-assembled.html) | |---|---| | [![Mounting Bracket for Standard-Size Servos](https://core-electronics.com.au/attachments/localcontent/0J9423_25402a1f2f.jpg)](https://core-electronics.com.au/mounting-bracket-for-standard-size-servos.html) | [Mounting Bracket for Standard-Size Servos](https://core-electronics.com.au/mounting-bracket-for-standard-size-servos.html) | |---|---| | [![FEETECH High-Torque Servo FS5115M-FB with Position Feedback](https://core-electronics.com.au/attachments/localcontent/0J9685_5715d0e7ae.jpg)](https://core-electronics.com.au/feetech-high-torque-servo-fs5115m-fb-with-position-feedback.html) | [FEETECH High-Torque Servo FS5115M-FB with Position Feedback](https://core-electronics.com.au/feetech-high-torque-servo-fs5115m-fb-with-position-feedback.html) | |---|---| **Dimensions** | Size: | 40.5 × 20.5.× 37.5 mm | |---|---| | 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** - **Datasheet for the FEETECH High-Torque, High-Voltage Digital Servo FT5121M (123k pdf)** ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_11700.jpg)