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3D printed key organizer
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Printed It: Parametric Hex Key Holder
Desktop 3D printing is an incredible technology to be sure, but it’s not a cure-all. If you’re interested in making something in large numbers, or if production speed is a concern, 3D printing probably isn’t what you’re looking for. But on the flip side, if you want to make a few highly specialized or customized objects, desktop 3D printing represents an absolute revolution in capability for the individual hacker and maker.
In our ongoing mission to prove that desktop 3D printing isn’t just a novelty, we keep a close eye out for printable objects which play to the strengths of the technology. You won’t find any benchmarks or dust collectors here; everything featured in Printed It is a bona fide practical object. An ideal entry into this series is something that you wouldn’t need to print more than a few times, isn’t easily sourced or made via traditional means, and if possible, offers some form of customization which makes it more suitable to the individual’s needs than what’s commercially available.
Not every object we feature hits all of these marks, but this parametric hex key holder designed by [Daniel Leitner] absolutely does.
This object was created to address a problem that we imagine most Hackaday readers share: taming an ever-growing collection of hex keys. What’s more, this design is something of an open source success story. It’s an idea that passed through the hands of multiple community members, becoming more refined and functional as it went. Even if you don’t personally need to wrangle some unruly hex keys, this object is a fascinating look at how 3D printing and the community that has sprouted up around it is truly evolving the process of going from concept to execution.
Made-to-Order Design
Somewhere along the line it was decided that every kit, be it an entertainment center or a laser cutter, would include a handful of hex keys. So pretty soon you’re drowning in the things, but of course you never quite have the makings of a complete set and invariably you’ll have duplicates of certain popular sizes. Since folks like us have trouble getting rid of anything in the first place, they just end up filling some dark and dusty drawer until there’s enough of them that they start planning an insurrection.
To help quell the uprising, [Daniel] leveraged the parametric capabilities of OpenSCAD to create a fully custom holder for your collection of hex keys. By entering in the various sizes and number of hex keys you have into an array at the top of the script, his code will spit out a printable model that fits your exact specifications. So if for example you need to hold a half-dozen 2.5 mm hex keys, this design has got you covered.
In a particularly nice touch, the script will even deboss the sizes of the hex keys right into the holder so there’s no doubt about which one is which. While admittedly a minor detail, this is an excellent example of the power of OpenSCAD, and is something that would be difficult to recreate with more traditional CAD tools.
Refining the Concept
While he’s responsible for the parametric OpenSCAD code, [Daniel] didn’t actually come up with the original design for the hex key holder. That honor goes to [Alex Rich], who created a “static” version of the holder a couple of years back.
That version was well suited for moving your store-bought hex key sets over to a slightly more ergonomic holder, but lacked any customization and relied on a printed (as in, on paper) label for the top to show which slot was for which key.
That initial design was quite popular, and pretty soon [Alex] started getting requests for custom versions. He tried to accommodate the requests and put out different variations to the core design, but it was a losing battle. There’s simply too many permutations for one person to keep updating the design for each person’s scenario. He had put out the design because he thought others might find it interesting, not to take on a part-time job.
[Daniel] saw the situation and thought it would be a perfect application for OpenSCAD. He recreated the basics of the design: a disc-shaped holder with various sized openings around the periphery, but also made some critical improvements beyond the parametric aspect.
For one, the original design required support material inside the groove, but the new OpenSCAD version uses an angled face on the top side to remove this requirement with no impact on functionality.
In other communities, this might be considered a “rip-off” and kick off some sort of flame war, but not here. [Alex] not only appreciated the work that went into the OpenSCAD version of his design, but now actively points it out to anyone who asks him for a custom version of the original holder.
Printing Your Own
Since this is a customizable design, the first step is opening it up in OpenSCAD and making your modifications at the top of the file. You can enter whatever sizes you wish, but be aware there doesn’t seem to be any error checking in place. So for example if you enter in a size of 2.2 mm instead of 2.5 mm, nothing is going to stop you. The code is also surprisingly complex, so don’t be surprised if it takes up to a minute or two for OpenSCAD to generate your STL.
Once you have your STL the design is a very easy print, and relatively fast. You can use higher layer heights to speed things up, but if you’re using the parametric version with the integrated sizes, the text might come out poorly. I printed it at 0.15 mm which struck a nice balance between surface detail and speed, and the holder finished in just under an hour and a half.
After printing you need to provide either a rubber band or a suitable sized O-ring to fit into the grove. In both the original and parametric versions of the holder, the holes for each key are made loose enough that they won’t be retained from friction alone. The tension from the rubber band or O-ring is what actually holds everything in, so that the grip of the holder doesn’t degrade over time like it would be if it just used tight-fitting holes. In practice I found that O-rings work better than the rubber bands, even though the only ones I could find locally are actually much thinner than what the design calls for.
When I tried with the rubber bands the keys had a tendency to get stuck on insertion, but it will certainly work if you can’t find O-rings big enough.
Work with What You Have
Critics will say that the shape of this hex holder makes it uniquely suitable for traditional manufacturing: use a lathe to cut the O-ring grove into a piece of round stock, and then put it on the drill press to make the individual key holes. You’d lose the key sizes written on the side, but it would be faster to produce and much stronger than a piece of plastic. While all that’s true, we’re talking about thousands of dollars of equipment and the dedicated workshop to hold it all versus a cheap 3D printer in a hacker’s apartment.
The point isn’t that 3D printing is always the only, or even best, way to produce these designs. But it’s absolutely the most approachable and affordable way to do it, and goes a long way towards democratizing the creation of custom physical objects.
Free STL file Key organizer・3D printed object for download・Cults
Wood working spacer 1/8 inch (0.
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50 3D Printing Ideas
It looks like we'll soon be drowning in unnecessary things made for 3D printing projects.
But you can do something that will really be useful! If you're running out of ideas, here's a list of 50 3D printable items you're unlikely to throw away.
Bag clip with screw cap
Now the bag clip will have a new feature - a hole with a lid for quick access, as in the photo. This clip is easy to print and convenient to use. Strange that no one thought of this before. nine0006
Author: Minkix
Where to download: Thingiverse
Modular Furniture Connector
This connector allows you to quickly assemble modular furniture. The default model is designed for 17×17 mm wood, but the size and material can be changed to suit your needs using a parametric file for customization.
Author: LeFabShop
Where to download: Cults
Sealant Cap
No more throwing open sealant tubes away. The screw cap for the nozzle presses the o-ring tightly against the body of the tube and closes the access of air to the solvents inside.
nine0006
Author: The-Mechanic
Where to download: Thingiverse
Laptop niche
Now the laptop will always be at hand, but hidden from prying eyes in a special niche that is attached to the bottom of any coffee table.
Author: Too Snide
Download: Thingiverse
Phone holder - Candice
Elegant and simple, perhaps the easiest thing you can print on a 3D printer.
Author: Clem.C2
Where to download: Cults
Polypanels
The idea for Polypanels came from Devin Montes. A polypanel is a series of three-dimensional building blocks. The individual elements of a Polypanel look simple, but if you print a lot of them and different types, you can create all sorts of complex designs. Something like LEGO where you can design each brick.
Author: MakeAnything
Where to download: MyMiniFactory
Coat Hook
This coat hook is designed as an E3D attachment and can be printed multiple times to fit all your clothes.
Author: Filar3D
Where to download: Cults
Plant Pot
This anatomical brain flower pot is easier to print than it looks, creator DrFemPop says. For assembly, it is only necessary to glue the parts after printing. It turns out an original house for plants. nine0006
Author: DrFemPop
Where to download: Cults
Door Holder
This is a simple solution for holding a door. Double-sided adhesive tape is sufficient for surface mounting.
Author: Akiraraiser
Where to download: Thingiverse
Piggy bank
A simple piggy bank for beginners, no complicated settings.
Author: lecaramel
Where to download: Thingiverse
Cable ties
This tie is perhaps the simplest and most ingenious of all devices. Clips are printed as a whole sheet at once, and then the required amount can be cut off from it.
Author: Sunshine
Where to download: Cults
Roller ruler
An indispensable device if you need to measure the length of something non-linear: a piece of rope, a curved line, a perimeter with bends, etc.
The ruler is called Geneva and has step 5 mm.
Author: MechEngineerMike
Where to download: Thingiverse
Tongs
This small, solid piece of plastic can easily replace your pliers / pliers. These forceps take the force to the handles and redistribute it at the end of the grip. It's definitely pliers. Just smarter.
Author: BYU CMR
Where to download: Thingiverse
Cylindrical textured box
Beautiful tube from Syboulette decorated with hexagons. Well suited as a kitchen utensil for storing oatmeal, rice and other crumbly substances. nine0006
Author: Syboulette
Where to download: Cults
Door stopper
This stopper is modeled after the Guyer Anderson cat statue in the British Museum. The design is hollow, which allows you to fill the limiter with something for additional weight.
Author: Duaneindeed
Where to download: Cults
Plague Doctor Mask
Not exactly the most useful item on the list since bubonic plague is a thing of the past.
But a mask can come in handy, for example, when you need to clean up after your pet. And you can also go to the carnival in it. nine0006
Author: Odrivious
Download: Cults
Universal Spool Holder
This adjustable spool holder uses a spring and an adjustable rewind clutch. It's the perfect place to store those pesky wires.
Who made it: Vincent Goenhuis
Where to download: Thingiverse
Sturdy waterproof box
This tight-fitting box will keep things from getting wet. Print it in PLA or PETG, add a flexible TPU seal and M3 screws for the spring hinge, and you're done. nine0006
Author: ZX82
Where to download: Cults
Dice
This dice is suitable for flat 3D printing and has a face size of 16mm.
Author: Devin Montes (MakeAnything)
Where to download: MyMiniFactory
Collapsible Coat Rack
Really cool coat rack. That's all there is to say about her.
Author: Komaru
Where to download: Thingiverse
Business Card Holder
Perfect for showing off your new business cards to your Wall Street friends. What could be more delightful than this Zippo card holder with flip-top lid.
Author: PentlandDesigns
Where to download: Cults
Pencil and pen holder
Iceberg or melting beehive? Be that as it may, this is a handy pen and pencil holder that is cheaper to print than to buy.
Author: BeeVeryCreative
Where to download: Cults
Groovi Monster Audio Amplifier
This is a passive smartphone audio amplifier that looks stylish and does the job well. It's called Groovi Monster for a reason.
Author: 3DShook
Where to download: Cults
Cup holder
Can be used not only as a cup holder, but also as a coaster for hot dishes. The dimensions of the template are easily adjusted to suit any size cookware.
nine0006
Author: jmdbcool
Where to download: Thingiverse
Clamp
Designed for fixing various materials, including the ends of the wire in the coil. Also great as a clothespin replacement.
Author: Med
Where to download: Cults
Pencil Box
Suitable for storing all your desk trivia and trinkets (memory cards, rubber bands, pencils, paper clips, etc.).
Author: Monkey3D
Where to download: Cults
Headphone holder
This is a duck. Yes, you can hang headphones on it.
Author: Toshi_TNE
Download: Thingiverse
Polyhedral Succulent Pot
Unusual geometric pots for your growing succulent collection. These small pots can be configured to be connected together.
Author: PrintFutura
Where to download: Cults
Survival whistle
This is a survival whistle with original design. It is durable, easy to make and very loud (118 dB is more than enough to be heard in an emergency).
Author: Joe Zisa
Where to download: Thingiverse
Measuring cube
A simple and original measuring cube for the kitchen. On each side there are recesses for measuring the volume of ingredients (in cups - according to the American system, and in metric units for everyone else). It is best to print with PETG material, it is the safest for products. nine0006
Author: iomaa
Where to download: Thingiverse
Hinge
This is a parametric hinge that can be sized to suit specific needs.
Written by Rohin Gosling
Where to download: Thingiverse
Car Eyewear Holder
Attaches to your car's sun visor. Glasses will always be at hand.
Author: Trevor Long
Download: Thingiverse
Opener
The simplest things are usually the most useful. Convenient and easy to print opener. Covers the sharp edges of the cork as much as possible, protecting you from injury.
Author: Jeremy Peterson
Download: Thingiverse
Superhero Keychains
Sometimes you need to remind yourself of your hidden superpowers. Stylish and cool keyrings are well suited as a small gift.
Author: Formbyte
Where to download: Cults
Headphone stand
It will be useful for music lovers and gamers who use headphones a lot and often. After all, now they will no longer roll around anywhere.
Author: MakerBot
Where to download: Thingiverse
Bag Clip
The model consists of two printed parts. Allows you to keep packages closed and keep food fresh longer.
Author: Walter Hsiao
Download: Thingiverse
Plastic wrench
Handy wrench, but don't choose soft plastic to make it.
Author: Daniel Noree
Where to download: Cults
Sliding Decal
No more worrying about whether cups are clean or dirty right now in the dishwasher! With the help of a special mechanism, the slider easily changes the inscription on the plate.
Who made it: MiddleFingerBoss
Where to download: Thingiverse
Collapsible basket
Cool picnic item. A folding square basket with five sections is printed from several parts and then glued together. For product safety, it is recommended to use PETG plastic.
Author: PatternToPrint
Where to download: Cults
Self-watering plant pot
Houseplants are dying from your forgetfulness? This will not happen again! This pot will water them by itself, and your conscience will be clear. nine0006
Author: Parallel Goods
Where to download: Cults
Maze Gift Box
Cash is not the most original gift. But if you present them in such a gift box, your friend will surely like it. The lucky recipient will have to work hard to get to the prize, because there is only one right way.
Author: Robert
Where to download: Thingiverse
Wired headphone holder
The headphones will now be protected from tangles and breakage.
Author: Robert
Where to download: Thingiverse
Tube Squeezer
Helps squeeze out the contents of the tube to the last drop. Wide enough to fit most tubes on the market. Printed in three separate parts.
Author: Justin Otten
Where to download: Thingiverse
Webcam Shutter
The best thing for the paranoid and just for those who are uncomfortable being under the gun of a webcam. Instead of sticking tape or sticky tape over the lens, attach a slider shutter to the body and open it when you need a video call. nine0006
Author: Horizon Lab
Where to download: Cults
Prefabricated Hexagonal Crates
Useful to free the table from the noodles of cables, wires and just every little thing. The design can be easily expanded if necessary.
Author: Dan O'Connell
Where to download: Cults
Wall Mounted Phone Shelf
Attach the shelf to a power outlet and place your phone on it while charging.
