> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 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. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-3427:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/POLOLU-3427:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## 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)