A commitment to creating and knowledge sharing.
Our mission is to provide an uninhibited environment that promotes creativity and learning to any and all potential makers and hackers. We achieve this with our combination of collaborative work space, public classes, and the extensive knowledge base of our members.
The only Constant is Change
Arch Reactor is a constantly evolving organization, the tools-on-hand are ever changing and improving, driven by member initiatives.
Wood working
Power tools, hand tools, and specialty tools allow making just about anything out of wood
Metal working
Metal working capabilities expand and improve almost weekly as member make the tools they need
Textiles
From standard machines to industrial sewing that can handle denim and leather open many possibilities
3D printing
Several filament based 3D printers and resin printers are available, supporting projects up to 500mm3
Laser Engraving
With a 3ftx4ft cutting area our CO2 laser can cut and engrave large projects with ease
And more
Vinyl cutters, soldering, oscilloscopes, lapidary, and more!

Our 5000 ft2 reaction chamber contains a Shop full of equipment, a Lab to work on your projects, a Classroom to enrich your mind, and a Lounge where ideas can fuse together. Our space is a community workshop where members learn, collaborate, and bring ideas to life. Our members keep everything running, and our community is always working to improve the space.
Lab Area
The Lab area features a lot of table space for everyone to work on their projects in a low-dust environment. There are also many tools for working on electronics and other clean projects, including a soldering station, vinyl cutter, 3D printers, and an 80W laser cutter. There are shelves where members can keep a private tote, and an assortment of salvaged and donated parts available for anyone to use.
Classroom
The classroom seats over 20 students in a clean and quiet space conducive to learning. It is not completely finished, but it is functional and we have been using it to hold classes. We currently have two large flat panel displays on the walls for presentations. We expect in the future to add a large projector screen, white boards, a wireless microphone system, and a live streaming camera all available for any class.
Lounge
The lounge will be a cozy area for everyone to relax and socialize in. We currently have a fridge full of soda and a freezer with pizza, and we hope to soon have a full kitchenette. There are couches and comfy chairs, a MAME machine, and soon there will be a console gaming area as well.
Shop
Many of us urbanites don’t have garages to tinker in, which is why we have a fully featured shop in our space, including saws, vices, grinders, lathes, drill presses, planers, welders, kilns, forges and all the tools we need to create. Some tools are owned by the organization, but most are owned by our members and shared. Use of the shop is restricted to members, and you must always be trained before using a new tool.
“A co-op workshop for techies, tinkerers, and free thinkers.”
Evan S. Benn
St. Louis Post-Dispatch
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Quick Update
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The Face Shield Iniative STL has distributed 650 Face Shields with more on the way each day! With a demand of over 4,000 our AR members and fellow community makers are going strong! Keep up the good work! We support you!
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Face Shield Initiative STL
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In response to the quick and drastic needs of our local healthcare workers, the community of St. Louis makers and makerspaces have united to help fabricate much-needed hardware for nurses, EMTs and doctors. Led by maker David Cervantes, Face Shield Initiative STL is composed of volunteer community leaders from MADE Makerspace, Inventor Forge, and…
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COVID-19 Closure
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After careful deliberation the board has decided to close Arch Reactor to classes and events effective immediately until further notice. Card access is still enabled and private use is permitted if members continue to 1) Do not come to the space if not feeling 100%. 2) Clean your space with the provided cleaning agents prior…
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Egg Classes Coming Soon!
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Pysanky Eggs Set aside some time between March 29 and April 11, 2020 to learn how to decorate Pysanky (Ukrainian Eggs) Multiple dates/times available ifyou wish instruction or assistance, come to one or all sessions. Supplies available anytime AR is open if you do not need assistance. Everything supplied but your creativity! (Donations to the space appreciated but not required) Due…
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TODAY IS THE DAY FOR FIRE AND ICE FUNDRAISER EXTRAVAGANZA!!!!
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BE THERE! BE THERE! BE THERE ! Join us for this crazy unique annual fundraising event in it’s 10th year with our buddies the GATEWAY BURNERS (the St. Louis local chapter of Burning Man) MEMBERS – you should look at this as an opportunity to fulfill your 2 hours of volunteer time in and…
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2020 Election Results
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Please welcome the newly elected board! President Derek S. Vice President Joe C. Treasurer Alex H. Secretary <EMPTY> Sergeant at Arms Ann J. Public Relations Kim S. Education Ed H. Webmaster Joshua F.
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Super Bowl of Destruction
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Super Bowl of DestructionEveryone is invited to come to the Arch Reactor for the Super Bowl of Destruction. We will have the football game on our big screen for everyone to watch. Not interested in football? Don’t worry, we also throw this party as something for the non-football enthusiasts. As a hackerspace, we use this…
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The Maker’s Maker JOEL LEONARD RETURNS w/ a HOLD MY BEER SESSION
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SATURDAY, JANUARY 11TH 2020, 5:00p-8:00p Joel Leonard arrives to the Arch Reactor around 5pm continuing his current 2020 MAKER HAPPEN TOURS He’s been visiting makerspaces and hosting a fun HOLD MY BEER BRAINSTORMING SESSION to develop plans for future community projects and events. Called Hold My Beer because the intent is to have fun and…
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2020 Election Nominations
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This year the nominations for the 2020 elections will be occurring online. The nominations can entered and viewed once logged into the website under the Members tab -> 2020 Election Nominations or by visiting: https://archreactor.org/election/2 When entering a nomination the email address is optional but can be entered if known. To decline a nomination…
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