Refillable Gravity Pencils + Ergonomic Grip Cover

prusaprinters

<p>Hi,</p><p>&nbsp;</p><p>I always wanted an affordable, uncluttered and reliable mechanical pencil that I can always carry with me.&nbsp;</p><p>This is the 3d printed solution I came up with. It's a simple mechanism, allowing you to adjust the length of the leads using gravity. I think they are comfotable to hold, but since everyone is different I also made an ergonomic cover for the pen if you don't like the shape but still want to write/draw with it for a longer period of time.</p><p>&nbsp;</p><p>I hope you like it :-)</p><figure class="media"><oembed url="https://youtu.be/7PAY4yiHGZU"></oembed></figure><p>There are several versions with the following dimensions:</p><p>Keychain version: 55 x 12 x 4 mm</p><p>Short version: 105 x 12 x 4 mm</p><p>Long version: 125 x 12 x 4 mm</p><p>Long version with clip: 125 x 12 x 4 mm</p><p>Sturdy version (for 2.7 mm leads): 105 x 12 x 6 mm</p><p>The hole in the back has a diameter of 4 mm.&nbsp;</p><p>&nbsp;</p><p><strong>How do you print it?</strong></p><p>It consists of only one part and can easily be printed in around 1 hour with no supports. I recommend a 0.12 mm layer height, a 20% gyroid infill and PLA. &nbsp;The ergonomic grip cover is optional and can be printed in 45 minutes using the same settings.</p><p><strong>How do you use it?</strong></p><ol><li>You need basic leads with a 0.9* mm diameter in order to use this pencil.</li><li>To insert a lead, simply insert it at the hole in the front until it stops moving. Then rotate the pen upwards and press the lever on the side - gravity will do the rest for you as the lead slides down into the pen.<br><img class="image_resized" style="width:50%;" src="https://media.prusaprinters.org/media/prints/126295/rich_content/6b91ff2c-be5f-4b13-a07d-aee5ca1e148f/instructions.png#%7B%22uuid%22%3A%22e4631ea3-6c39-4a22-aca7-0e15bb58c91d%22%2C%22w%22%3A644%2C%22h%22%3A346%7D"></li><li>To store more leads just repeat step 2.</li><li>Press down the lever on the side and you will be able to slide them in. You can store several leads in the pencil.&nbsp;</li><li>In order to be able to write with the pencil you need to tilt the front down towards the paper and press the lever on the side - gravity will make the lead slide downwards. Just adjust it to the length that you desire and stop pressing the lever. This will fix the lead in its position. I recommend sliding the lead back after you used it to keep the PLA flexible for a long time!&nbsp;</li></ol><p>&nbsp;</p><p>&nbsp;</p><p>*if you need a different diameter just let me know</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>If it does not work for you please leave a comment or shoot me a message instead of just posting a 1 star review, I'm sure there is no problem that can't be solved.</p>