--- title: How to change the hotend (Sigma Series) description: In this article you will learn how to safely change the hotend --- [Skip to content](https://support.bcn3d.com/knowledge/change-hotend-bcn3d-sigma-series#main-content) - [English](https://support.bcn3d.com/knowledge/change-hotend-bcn3d-sigma-series) - [Deutsch](https://support.bcn3d.com/de/knowledge/change-hotend-bcn3d-sigma-series) - [Español](https://support.bcn3d.com/es/knowledge/change-hotend-bcn3d-sigma-series) - [Français](https://support.bcn3d.com/fr/knowledge/change-hotend-bcn3d-sigma-series) - [Italiano](https://support.bcn3d.com/it/knowledge/change-hotend-bcn3d-sigma-series) English Show submenu for translations [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new?hsLang=en) [Customer portal](https://support.bcn3d.com/repair-service?hsLang=en) ![knowledge-base-header-bcn3d-logo.png\]](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Header/knowledge-base-header-bcn3d-logo.png?height=40&name=knowledge-base-header-bcn3d-logo.png) - [Default HubSpot Blog](https://blog.bcn3d.com/) Open main navigation Close main navigation - [Default HubSpot Blog](https://blog.bcn3d.com/) - - [English](https://support.bcn3d.com/knowledge/change-hotend-bcn3d-sigma-series) - [Deutsch](https://support.bcn3d.com/de/knowledge/change-hotend-bcn3d-sigma-series) - [Español](https://support.bcn3d.com/es/knowledge/change-hotend-bcn3d-sigma-series) - [Français](https://support.bcn3d.com/fr/knowledge/change-hotend-bcn3d-sigma-series) - [Italiano](https://support.bcn3d.com/it/knowledge/change-hotend-bcn3d-sigma-series) English Show submenu for translations - [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new) - [Customer portal](https://support.bcn3d.com/repair-service) - [BCN3D forum](https://www.bcn3d.com/community/) [BCN3D forum](https://www.bcn3d.com/community/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge base - BCN3D](https://support.bcn3d.com/knowledge?hsLang=en) 2. [Sigma Series](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en) 3. [Maintenance](https://support.bcn3d.com/knowledge/sigma-series?hsLang=en#maintenance) # How to change the hotend (Sigma Series) ## In this article you will learn how to safely change the hotend   --- | | [**EN**](https://support.bcn3d.com/knowledge/change-hotend-bcn3d-sigma-series) | [**DE**](https://support.bcn3d.com/de/knowledge/change-hotend-bcn3d-sigma-series?hsLang=en) | [**IT**](https://support.bcn3d.com/it/knowledge/change-hotend-bcn3d-sigma-series?hsLang=en) | [**ES**](https://support.bcn3d.com/es/knowledge/change-hotend-bcn3d-sigma-series?hsLang=en) | **[FR](https://support.bcn3d.com/fr/knowledge/change-hotend-bcn3d-sigma-series?hsLang=en)** | | --- | --- | --- | --- | --- | --- | ---   The BCN3D Sigma D25 is equipped with two 0.4 mm hotends. However, it **is possible to change the hotend** in order to increase the versatility of the 3D printer. Every part has its particularities and needs, so it’s wise to choose the proper hotend for each print job. - The sizes of the **[hotends compatible](https://support.bcn3d.com/knowledge/bcn3d-hotends?hsLang=en) with the BCN3D Sigma D25 are 0.4 / 0.8 mm**. You can find them in [our store](https://www.bcn3d.com/3d-printer-spare-parts/). Small nozzles are ideal for detailed models. Instead, big nozzles allow users to fabricate more resistant parts or for rapid prints.     - **Warning!** Be careful when handling the connection cover as the cables underneath can be damaged. If the last 4 digits of your printer's serial number are **higher than 0381**, you should take the following into consideration: - **Warning!** The piezo cable is extremely sensitive, use caution when handling it. ![cable-piezo-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Extruder%20board/cable-piezo-1.png?width=688&name=cable-piezo-1.png) - Below is the placement of the connections of the main components ![extruder-board-piezo-connections](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Extruder%20board/Hotend.png?width=688&name=Hotend.png)   | **Send us your comments about this article** | [![feedback-button](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Button/feedback-button.png?width=179&name=feedback-button.png)](https://share.hsforms.com/1F7t1sBuOQyWlAeRwwFSjgQ3fec5) | | --- | --- | | **RELATED ARTICLES** | | | [![install shims eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/install%20shims%20eng.png?width=336&name=install%20shims%20eng.png)](https://support.bcn3d.com/knowledge/install-shims-bcn3d-sigma-series?hsLang=en) | [![clean hotend eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/clean%20hotend%20eng.png?width=336&name=clean%20hotend%20eng.png)](https://support.bcn3d.com/knowledge/clean-hotend-bcn3d-sigma-series?hsLang=en) |   - 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