8-3030

8-3030 is an European-standard 8-series (groove width 8mm) 30×30mm square cross-section aluminum profile, 6063-T5 alloy, wall thickness 1.8mm, weight per meter 0.85kg/m, moment of inertia 3.20cm⁴ — it is the smallest stocked cross-section in the 8-series. People who choose it usually are not rejecting 8-4040 as too bulky, but need a small frame thatcombines 8-series fitting strengthwithout taking up space.

Moving from the 6-series to the 8-series changes more than just dimensions

Many people think 8-3030 is simply"one size up from 6-2020", but the key difference isthe groove width changing from 6mm to 8mm:

• T-slot nuts have a larger load-bearing area, so the same fastening method can hold heavier attachments;
• 8-series angle brackets, hinges, handles, and caster wheels come in more complete sizes, offering more extension options;
• The groove can accommodate thicker bolts, so threads wear more slowly during repeated assembly and disassembly.

Therefore, 8-3030 is positioned as:a frame that is not large but needs to hold quite a few things. Sensors, small pneumatic cylinders, cable trays, door panels, and cover panels all mount more securely on the 8-series groove than on the 6-series.

Technical parameters

When to use 8-3030 and when to go straight to 8-4040

Three practical rules of thumb:

• Frame outer dimension within 600mm, holding only static parts → 8-3030 is sufficient; using 8-4040 would be wasteful.
• Need to mount moving parts (guide rails, slides, pneumatic cylinders) → go straight to 8-4040; the dynamic rigidity of 8-3030 is insufficient.
• One side experiences particularly obvious bending (such as a long door frame) → 8-3060 is more suitable than 8-3030; with the same narrow edge, it is much stronger in the height direction.

Typical uses of 8-3030

• Small inspection equipment frames: The equipment itself is light, and the frame needs to be stable without being bulky; the 30mm square looks unobtrusive on a workbench.
• Cover panel and door panel frames: Outer frames for acrylic doors and sheet metal covers; the 8mm groove makes it easy to install hinges and handles.
• Instrument and meter stands: Height-adjustable structures; 8-series fittings include ready-made leveling feet and pivot connectors.
• Cable tray and bridge support: Only supports cable weight; the 30mm square has ample strength margin.
• Prototype and display stands: For situations with high appearance requirements but low load requirements.

Fittings and delivery

All four sides feature standard 8mm grooves, compatible with European-standard 8-series fittings — no dedicated parts needed.The 8-series, 6-series (6mm), and 10-series (10mm) have different groove widths and non-interchangeable fittings— this is the most common mistake in selection, especially when a site already has a batch of 6-series fittings.

Profiles are in regular stock, standard length 6.02m, sold from 1 meter, and can be cut to drawings with cutting precision ±0.5mm; drilling and tapping can also be requested. Produced in Qingpu, Shanghai; delivery within Shanghai city is available.

FAQ

How much stronger is 8-3030 compared to 6-2020?

Moment of inertia is 3.20cm⁴ vs. 1.20cm⁴, about 2.7 times; weight per meter is 0.85kg/m vs. 0.50kg/m, a 70% increase. So it is not just"one size up", but more than double the rigidity — which is the main reason for the price difference.

Can 8-3030 serve as a main equipment frame?

Depends on the equipment. It works for static equipment with light individual parts; for equipment with moving parts, vibration, or long-term precision requirements, 8-4040 is recommended as the starting point. Once the main frame deflects, precision cannot be recovered.

How to choose between 30×30 and 30×60?

Depends on the load direction. If connections are needed on all sides and loads are distributed, use 8-3030; if bending is obvious in one direction and only a 30mm narrow edge is available (door frames, side frames, wall-mounted frames), use 8-3060 — its height-direction moment of inertia is 13.20cm⁴, more than 4 times that of 8-3030.

Can 8-series and 6-series fittings be mixed?

No. The 8mm and 6mm groove widths differ by 2mm, nut and angle bracket sizes are different, and forced installation will cause play. When two series are mixed in a project, fittings must be stocked separately by series.