Aluminium strut profile 40x40L slot 10

AL Modular System · C10 profiles

Aluminium strut profile 40x40L – profile with slot 10, 40 series

The 40x40L is the basic profile of the 40 series: 10 mm slots on all four sides and a 40 mm modular dimension. It is more compact than the 45x45L and weighs 1.5 kg/m: use it for benches, workstations, guards, equipment frames and light trolleys. At the end the central bore can be threaded M12 for levelling feet and screws.

Section 40 × 40 mm10 mm slot1.5 kg/mIx = Iy 9.1 cm⁴40 series

9,1 cm⁴Ix = Iy

1,5 kg/mweight

6070 mmbar, usable length

40 mmmodular dimension

Why choose it

Compact

40 mm side with the 10 mm slot: C10 accessories in a reduced footprint.

Complete family

In the 40 series you will find versions with closed sides (1N, 2N), the radiused one (R) and the 40x80L and 40x120L profiles.

Central bore M12

Threaded at the end it takes levelling feet and screws: minimum length 60 mm on one end, 110 on both.

Bar or cut to size

6070 mm bar of usable length or pieces cut to your dimensions, from 50 mm upwards.

Choose it if…

You build compact benches, workstations or guards with normal loads.
You want 10 mm accessories in a 40 mm footprint.
You want to combine 40 series profiles (40x80L, 40x120L, 80x80L) with the same connectors.
You need a light profile that is easy to modify.

Choose another solution if…

You need smooth sides, with only one open slot: on request
You have more heavily loaded crossbars: the 40x80L has Ix 63.4 cm⁴: Aluminium strut profile 40x80L →
You prefer the 45 series, with a little more rigidity: Aluminium strut profile 45x45L →

Not sure which profile to choose? Open the guide with the profile table →

How to use it in the structure

Three practical tips for the 40x40L:

Stay within the series

In the 40 series slots and pitch are the same for all profiles: 40x40L, 40x80L and 40x120L use the same connectors.

Span and deflection

Over a 1000 mm span, supports at the ends and 500 N at the centre, the theoretical deflection is about 1.6 mm.

Closed sides where needed

The 1N and 2N versions leave one or two slots open: smooth sides where you fix nothing.

For long crossbars move to the 40x80L upright: Ix seven times higher.

The LeanProducts service

Original components and a single point of contact, from drawing to kit:

Cutting to length

We cut the profiles in our workshop to the lengths in your parts list.

Parts list check

We start from the parts list or sketch: we check codes, quantities and connection accessories.

Ready-to-assemble kits

You receive cut profiles, brackets, nuts and cover caps grouped for your structure.

Spare parts

When you modify or extend the structure we supply profiles and components from the same system.

Send us a sketch with the overall dimensions: we reply with codes, accessories and cut lengths.

Technical data

Property	Value
Code	3842993120
Section	40 × 40 mm
Slot	10 mm (C10)
Cross-sectional area	A = 5.6 cm²
Weight	1.5 kg/m
Moment of inertia	Ix 9.1 cm⁴ · Iy 9.1 cm⁴
Section modulus	Wx 4.5 cm³ · Wy 4.5 cm³
Torsion	It 1.30 cm⁴ · Wt 0.74 cm³
Bar length	6070 mm (usable length) or cut to length
Minimum cut length	50 mm
Alloy and finish	EN AW-6063 (AlMgSi), extruded, anodised E6/EV1 12 µm (300 HV)
Mechanical properties	Rm 245 N/mm² · Rp0.2 195 N/mm² · E 70 000 N/mm² · 75 HB
Tolerances	Straightness max 0.75 mm/m · torsion max 0.70 mm/m
Cover cap	Cover cap for profile 40x40 in PP, grey or black ESD
Series	40 series (40 mm modular dimension)
Slot geometry	Light (“L” profile with optimised section)
Standard machining	M12 thread in the central bores, D9.8 and D17 holes for connectors; profile machined up to 6000 mm
Packaging	Single bar or pack of 20 bars

The bar has the stated usable length: the physical piece is about 100 mm longer, because the anodising contact points remain at the ends.

Downloads

MGE catalogue pages 15 Download PDF

Related products

Levelling foot D30 H72 C10Levelling foot M12 for the threaded bore

Any other questions?Read the 15 FAQs →

Need help with your profile parts list?

Send us a sketch or the parts list: we will give you codes, accessories and cut lengths.

Request a quote Call +39 0434 572757

Specifications

Brand	Bosch Rexroth
Section mm	40x40
Slot mm	10
Max length mm	6070
Alloy	EN AW-6063 (Al MgSi)
Production method	Extrusion
Surface treatment	Anodising E6/EV1, 12 µm, 300 HV
Coefficient of thermal expansion	23.4 × 10⁻⁶ 1/K (+20…100 °C)
Tensile strength	245 N/mm²
Yield strength	195 N/mm²
Elongation at break	10%
Modulus of elasticity E	70000 N/mm²
Brinell hardness	75 HB
Straightness tolerance	max 0.75 mm/m
Torsion tolerance	max 0.70 mm/m
Min length mm	50
Cross-section area cm²	5.6
Torsion factor It cm⁴	1.30
Torsion factor Wt cm³	0.74
Section modulus Wx / Wy cm³	4.5 / 4.5
Moment of inertia Ix / Iy cm⁴	9.1 / 9.1
Weight	1.5 kg/m
Open slots	all slots open
Length	6070
Material	Anodized aluminium

The 40x40L weighs 1.5 kg/m and has Ix 9.1 cm⁴; the 45x45L weighs 1.6 kg/m and has 11.7 cm⁴. Both have a 10 mm slot, but brackets, cover caps and connectors are taken in the series size, 40x40 or 45x45: choose one series and use it throughout the structure.

Quando il profilo resta a vista o va pulito spesso e ti basta un solo lato per fissare accessori: montanti di banchi, telai di macchine a contatto con trucioli o polvere, bordi di strutture. In più è molto più rigido a torsione del 40x40L.

Quando il profilo si collega solo su due lati opposti, come una traversa tra due pannelli o tra due file di accessori, e vuoi gli altri lati lisci. Se ti serve un lato in più usa il 40x40L standard; se ti basta un lato, il 40x40L 1N.

An example: 1000 mm span, crossbar supported at the ends and 500 N at the centre. The theoretical deflection is about 1.6 mm (E = 70 000 N/mm², Ix = 9.1 cm⁴). If you need less deflection, the 40x80L upright drops to about 0.23 mm.

Have the central bore at the end threaded M12 and screw in an levelling foot with M12 stem. The profile threaded on one end is ordered from 60 mm in length, on both ends from 110 mm.

The bracket 40x40 for 90° joints, the cubic connector 40x40 for three-way joints and the T-connector 40x40. They are all for 10 mm slot in size 40.

The cover cap for profile 40x40 in polypropylene, grey or black ESD: it also closes the 40x40L 1N and 40x40L 2N.

It is the width of the profile slot and determines which accessories you use. Slot C6 (6 mm) is for 20 series profiles, C8 (8 mm) for the 30 series, C10 (10 mm) for profiles from the 40 series upwards. Nuts, screws, brackets and cover caps are chosen by slot: each accessory's product page shows the right one.

Yes. You can order the full bar or the piece cut to the length you need: we do the cutting ourselves, in our workshop. Each profile's product page shows the maximum bar length and the minimum cut length.

Look at the moments of inertia Ix and Iy: the higher they are, the less the profile deflects under load. For the same section, “L” profiles are lightened and deflect a little more. For long spans or high loads move to a larger section or a tall profile (e.g. 45x90 instead of 45x45). If you send us drawing and loads, we will check the choice.

The T-nut is inserted from the front into the slot, even in an assembled structure, and positions itself when you tighten the screw: it is the standard choice for fixing accessories. The sliding block withstands higher forces, but normally has to be inserted from the profile end before closing the frame; spring versions stay where you put them.

The simplest way is the bracket, which joins two profiles at 90° with screws and nuts in the slot, without machining. For end, T, 45° or three-way connections there are dedicated connectors, some of which require profile machining as stated on their product page.

Yes, for several accessories (for example cover caps, hinges and nuts) there are conductive ESD versions, indicated in the name or variant. Tell us which EPA area you work in and we will confirm the components to use.

On each product page you will find the MGE catalogue pages to download as PDF, with dimensioned drawings and technical data; the Specifications tab shows the data for the variant you have chosen.

Yes. Send us the parts list or a sketch with dimensions: we give you codes, quantities and cut lengths and prepare the kit with profiles already cut and the accessories.