PG40 80×40 mm Six Slot Light Aluminium Strut Profile for Panel Frames

OEM / ODM Available Free Sample Available ISO 9001:2015 EN 755-9 RoHS REACH

An 80 x 40 mm six slot light wall PG40 aluminium strut profile for panel frames, guards and long runs. Standard groove geometry with a reduced wall between the super light and standard sections.

Wholesale Price $3.90 - $6.10 / m per m

Material	Aluminium
Alloy Grade	6063-T5
Temper	T5
Section Size	80 x 40 mm
Slot	6 x 10.2 mm groove, 8 mm mouth, 40 mm pitch, 2 slots per 80 mm face and 1 per 40 mm face, M8
Length	6 m stock, cut to drawing to +/-0.5 mm
Tolerance	EN 755-9 / GB/T 6892, wall +/-0.15 mm
Surface	Mill finish / clear anodised / black anodised
MOQ	300
Lead Time	18-28 days after deposit for mill finish
Loading Port	Shanghai / Ningbo
Supply Ability	400 t per month
Payment Terms	T/T 30% deposit + 70% before shipment \| L/C at sight
Trade Terms	FOB \| CIF \| EXW
Certifications	ISO 9001:2015 \| EN 755-9 \| RoHS \| REACH

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Structural framing · PG40 light wall beam

A PG40 80 x 40 mm six slot light aluminium strut profile is a reduced wall version of the standard 80 x 40 mm beam. The envelope, the six 10.2 mm grooves, the 40 mm pitch and the 8 mm mouth are unchanged, so every 40 series bracket, nut, cap and cover fits. It weighs about 2.55 kg/m against roughly 3.05 kg/m for the standard wall and is supplied in 6063-T5.

The light wall is a genuine middle option, not a compromise. It sits between the super light section, which is for covers and display frames, and the standard section, which is the general purpose machine framing choice. Where it earns its place is on frames that are long, carried by hand, or shipped — and where nothing in the design depends on a tapped thread or a heavily clamped joint.

80 x 40 light wall section: the standard groove geometry with the wall reduced between super light and standard.

The only honest way to compare walls

Comparing wall thicknesses on price per metre is meaningless, because a heavier section is not better, it is only heavier. Comparing them on stiffness alone is equally misleading, because the stiffest section is also the heaviest and might be overkill. The comparison that actually decides a design is stiffness per kilogram: how many cm4 of second moment of area you get for each kilogram per metre of profile.

On the 80 x 40 section that number is almost flat across the four walls, which is the most important fact about the range. A heavier wall is not a more efficient section; it is simply a bigger one.

Wall	Weight	Stiffness on edge	cm4 per kg/m	Stiffness flat	cm4 per kg/m flat
Super light	approx. 2.10 kg/m	approx. 43 cm4	approx. 20	approx. 17 cm4	approx. 8.1
Light	approx. 2.55 kg/m	approx. 52 cm4	approx. 20	approx. 20 cm4	approx. 7.8
Standard	approx. 3.05 kg/m	approx. 62 cm4	approx. 20	approx. 24 cm4	approx. 7.9
Heavy	approx. 3.60 kg/m	approx. 74 cm4	approx. 21	approx. 29 cm4	approx. 8.1

Stiffness per kilogram is flat, so weight alone does not choose the wall. What separates the four walls is not efficiency but capability: the ability to take a tapped thread, to hold torque in the slot lip, and to survive a concentrated load. Those are the criteria that should decide it.

When the light wall costs less

The light wall is cheaper per metre and lighter per metre, and on the right job it is cheaper in every sense.

On a guard frame the section carries a panel and very little else. The panel spans between the members, so the frame’s job is to hold the panel’s edges rather than to span anything itself. On that duty the light wall has ample stiffness, and the weight saved is weight that does not have to be lifted during assembly or paid for in freight.

On a long run — a conveyor side rail, a run of cladding support, a fence line — the saving is proportional to the length, and a run of a hundred metres turns a 0.5 kg/m saving into a significant freight line. On a frame that is shipped flat packed, the saving is in the carton weight as well.

When the light wall costs more

There are three situations where a light wall is the expensive choice, and all three are common enough to be worth checking before the order is placed.

When the design needs a tapped threadA light wall cannot hold an M8 thread in the flange or a reliable thread in the corner bore. If the drawing shows a tapped connection, the light wall forces a redesign to slot nuts and brackets — which costs more in design time and in parts than the wall saving is worth.

When a support has to be added to make it workIf the light wall needs a mid support that the standard wall would not have needed, the extra support, the extra brackets and the extra assembly time usually cost more than the profile. On this section the stiffness difference between light and standard is about 19 per cent, so this is a real risk on a span that is already marginal.

When the joint is clamped hardThe slot lip on a light wall deforms at a lower torque. If the application needs a high clamping force — holding a rail against a thrust, or a joint that has to stay tight under vibration — the standard wall will hold a torque the light wall cannot, and that is a functional limit rather than a preference.

Application	Light wall verdict	Reason
Guard panel frame	Right choice	The panel spans, the frame only holds edges
Exhibition and display stand	Right choice	Handled and shipped repeatedly
Long conveyor side rail	Right choice	Saving multiplies with length
Cladding or fascia support	Right choice	Light, uniform load, long runs
Machine subframe under a unit	Standard wall	Concentrated load and possible tapping
Linear rail mounting beam	Standard wall	Rail flatness and joint stiffness both matter
Any member with a tapped hole	Standard or heavy	A light wall cannot hold the thread
Cantilever bracket arm	Standard or heavy	The joint must resist a moment

Working with a light wall

Design every joint as a bracket and slot nut joint No end face connectors, no self-tapping connectors, no tapped holes. Decide it at the drawing stage rather than on the bench.
Keep the torque at about 10 to 12 N m for M8 The slot lip is the limit. A standard wall takes about 15 N m; the light wall should be held below it.
Use more fixings rather than tighter ones A 40 mm pitch gives plenty of positions. Four lightly loaded joints outperform two heavily loaded ones on a reduced wall.
Mount the 80 mm dimension vertical It gives about 2.6 times the stiffness of the flat orientation. On a light section the orientation matters more, not less.
Add a mid support rather than stepping up a wall if it sags If the frame is already designed around the light section, a support is cheaper than a redesign. If it is not yet designed, choose the standard wall.

Frequently asked questions

How much lighter is the light wall than the standard?

About 2.55 kg/m against roughly 3.05 kg/m, so about 16 per cent. The stiffness difference is about 19 per cent, so the two track each other closely and the efficiency is essentially the same.

Can I tap a light wall?

Not reliably. The flange is too thin for an M8 thread and the corner bores do not have enough material around them. If a tapped connection is required, use the standard or heavy wall.

Will the standard 40 series fittings fit?

Yes. The envelope, the groove, the 40 mm pitch, the corner bores and the centre bore are all identical to the standard section, so every 40 series bracket, nut, cap and cover fits without change.

Is the light wall cheaper overall?

On the right job, yes. On a frame that ends up needing an extra support, or that has to be redesigned because a joint cannot be tapped, it costs more. The check is simple: does anything in the design depend on a tapped thread or a hard clamped joint? If yes, the light wall is the wrong choice.

What torque should I use?

About 10 to 12 N m for an M8 slot nut, against about 15 N m on the standard wall. The limit is the deformation of the slot lip, which is thinner on this section.

Send the frame duty and whether anything is tapped

Tell us what the frame carries and whether any joint is tapped or clamped hard. We will say honestly whether the light wall works or whether the standard section is the cheaper choice in the end.

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