80/20 aluminum extrusion is a modular T-slot profile system for building frames, workstations, guards, and enclosures using matching hardware.
Most people hear 80/20 and think of the company; makers know it as a building system. Understanding what 80/20 aluminum extrusion is starts with one idea: the aluminum does the structure, and the T-slots do the connecting. Pick a precision-cut profile, bolt it to compatible brackets and fasteners, and you have a frame — no welding required.
The company behind the name, 80/20 Inc., describes itself as an “Aluminum T-slot Building Systems” supplier, and its catalog runs past 8,000 products. The system spans seven families — 10 Series, 15 Series, 20 Series, 25 Series, 30 Series, 40 Series, and 45 Series — so a workbench, a robot arm, and a machine guard can all start from the same idea on different rails.
How the 80/20 System Works
An 80/20 build starts with a T-slotted profile cut to length, then joined to other profiles with fasteners, joining plates, brackets, and accessories matched to that profile’s series.
Every rail carries open T-slots down its full length, and align-a-grooves along the faces help keep connections straight when two profiles slide together. Fasteners drop into the slot and lock with a hex wrench, so joints stay adjustable until you cinch them down. The workflow is mechanical rather than metallurgical: cut, align, bolt, and the frame is done.
Regular shop tools handle the cutting, and 80/20’s “Finishing Your Frame” page covers post-assembly extras such as feet, covers, and end caps. You’ll find the system wherever structure needs to come together fast — automation, robotic arms, machine frames, guarding, enclosures, displays, workstations, CNC frames, 3D printers, carts, and shelving.
Which 80/20 Series Should You Use?
The series defines a profile’s size and its hardware family, and matching the two is the whole game. Choose 10 Series for inch-based builds and 20 Series for metric ones; the other series fill heavier and lighter roles.
80/20 groups profiles by cross-section size. 10 Series uses one-inch-based fractional profiles, 20 Series uses 20 mm metric profiles, and 15, 25, 30, 40, and 45 Series fill out the range. 80/20’s T-slot profiles catalog organizes every family under its series.
Profile names carry their dimensions. A 10 Series 1050 is 1.00 by 0.50 inches with one open T-slot, a 1010 is a 1-inch square with four, and a 1020 is 1.00 by 2.00 inches with six. The 1020-Black swaps clear anodize for black; the 1020-97 is the 97-inch-long version of the same rail. 10 Series listings call out 6105-T5 or equivalent aluminum with a 35,000 psi yield strength, while 20 Series reseller listings say 6063-T6.
The core 10 Series profiles break down like this:
| Profile | Dimensions | T-Slots & Finish |
|---|---|---|
| 1050 | 1.00 x 0.50 in | 1 open T-slot, clear anodize |
| 1010 | 1 x 1 in | 4 open T-slots, clear anodize |
| 1020-Black | 1.00 x 2.00 in | 6 open T-slots, black anodize |
| 1020-97 | 1.00 x 2.00 in, 97 in long | 6 open T-slots, clear anodize |
What to Check Before You Order
Ordering the right extrusion is a matching game: series, dimensions, slot count, and finish all have to line up with your hardware and your load.
- Keep hardware in the same series. 10 Series fasteners are not the same as 15/20/25/30/40/45 Series fasteners, so mixing series means mismatched parts.
- Confirm the exact dimensions. similar profile names differ in width, length, slot count, and finish.
- Count the open T-slots and note where they sit. Brackets and accessories mount into slots, so a six-slot rail and a one-slot rail behave differently in the same build.
- Check material grade and finish when loads or corrosion matter. 10 Series listings say 6105-T5; 20 Series reseller listings say 6063-T6.
For safety-critical structures, verify loads and fastening methods with the manufacturer or engineering documentation — published specs confirm dimensions and materials, not full structural design limits.
Brackets, fasteners, and accessories add up fast, so most builders budget for hardware before ordering. If the shopping part is next, our list of the best 80/20 aluminum extrusions covers the profiles worth starting with.
FAQs
Why is it called 80/20?
The company name comes from the 80/20 rule — the observation that roughly 80% of effects trace back to 20% of causes. The system follows the same logic: a small set of standard profiles and fasteners handles most framing jobs without custom machining.
Can I mix 10 Series and 20 Series parts in one build?
Not without planning. 10 Series parts work with 10 Series fasteners, and each other series — 15, 20, 25, 30, 40, and 45 — uses its own matching hardware. If a build crosses series, check that every bracket and fastener matches the profile it touches.
How strong is 80/20 aluminum?
10 Series profiles list a 35,000 psi yield strength in 6105-T5 or equivalent aluminum, which is why the system shows up in CNC frames and 3D printers. For load-bearing or safety-critical builds, confirm the actual loads and fastening methods against engineering documentation first.
References & Sources
- 80/20 Inc. “T-Slotted Profiles.” Official catalog of profile series, sizes, materials, finishes, and compatible hardware.