<p>A question to those who have a 3D printer. Have you ever needed a spare throat or a heater block? Do they ever break? </p>

<p>I just bought some spare parts: heaters, thermistors, nozzles... However, I am not sure if buying throats and heater blocks make any sense.</p>

[{'answer_id': 12115, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 3, 'selected': True, 'text': '<h1>Short answer</h1>\n<p>Yes</p>\n<h1>Long answer</h1>\n<h2>Heater bocks</h2>\n<p>A heater block is destroyed if one of the following happens</p>\n<ul>\n<li>Threads stripped</li>\n<li>Bent or otherwise deformed</li>\n<li>stripped grub screw</li>\n</ul>\n<p>All of these can happen by handling the block with too much force when securing nozzles, thermosensors or heater cartridges.</p>\n<h2>Throats</h2>\n<p>Throats can be destroyed, especially e3D v6 throats with their neck down on the center can be simply turned and broken in two. Lined throats can be heated too much and the liner destroyed, which not always can be replaced, mandating a spare part. And you can strip the threads.</p>\n<p>Another chance to damage the throat is by using very hard material nozzles - stainless steel comes to mind. Such a nozzle would not deform itself like brass when tightened against the throat and might lead to damage to the end of the throat if exchanged several times.</p>\n<h2>Conclusion</h2>\n<p>If you run several printers or change nozzles regularly for whatever reason, it is a very good idea to have at least a complete set of spare parts on hand to fix problems that might occur during work on the printer. I have a fully assembled spare hotend waiting for its day to shine in case my current one breaks...</p>\n'}, {'answer_id': 12116, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 1, 'selected': False, 'text': '<p>Parts don\'t have to break or bent, they may become unusable by other issues as well!</p>\n\n<p>In addition to <a href="/a/12115">the answer of @Trish</a>, if you clog your hotend, or the hotend/heater block/nozzle gets buried deep into solidified filament (see image below), it might be much easier just to replace the parts rather than salvaging the parts (or you can salvage the parts later, in the meantime you\'ll be up and running).</p>\n\n<p>E.g. recover from <a href="/q/8252">this</a>:</p>\n\n<p><a href="https://i.stack.imgur.com/HYYcU.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HYYcU.jpg" alt="enter image description here"></a></p>\n'}]
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