Aluminium strut profile 40x120L slot 10

AL Modular System · C10 profiles

Aluminium strut profile 40x120L

The 40x120L lines up three 40 mm modules: eight 10 mm slots and central bores that can be threaded M12. Upright it has Ix = 203.2 cm⁴, more than three times the 40x80L: it is the 40 series beam for long spans, bases and worktop frames with significant loads.

Section 40 × 120 mm8 slots of 10 mm4.2 kg/mIx 203.2 cm⁴40 series

Why choose it

Tall beam

Ix 203.2 cm⁴ upright: long spans without intermediate supports.

Three modules

Eight slots aligned to the 40 mm grid to fix guides, panels and accessories.

M12 central bores

All central bores can be threaded M12; D17 holes in the slots for connectors.

Technical data

Property	Value
Code	3842993139
Section	40 × 120 mm
Slot	10 mm (C10)
Cross-sectional area	A = 15.5 cm²
Weight	4.2 kg/m
Moment of inertia	Ix 203.2 cm⁴ · Iy 27.8 cm⁴
Section modulus	Wx 33.9 cm³ · Wy 13.9 cm³
Torsion	It 17.20 cm⁴ · Wt 10.00 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	1 cover cap 40x40 + 1 cover cap 40x80 in PP, grey or black ESD
Series	40 series (40 mm modular dimension)
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 8 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

Aluminium strut profile 40x80LProfile 40x80L from the same series

Any other questions?Read the 11 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	40x120
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	15.5
Torsion factor It cm⁴	17.20
Torsion factor Wt cm³	10.00
Section modulus Wx / Wy cm³	33.9 / 13.9
Moment of inertia Ix / Iy cm⁴	203.2 / 27.8
Weight	4.2 kg/m
Open slots	all slots open
Length	6070
Material	Anodized aluminium

With two cover caps side by side: one 40x40 and one 40x80, grey or black ESD. Order them together: a single 40x120 cover cap does not exist.

A great deal: upright Ix 203.2 cm⁴, flat Iy 27.8 cm⁴, about seven times less. Mount it with the 120 mm side in the direction of the load.

The 40x120L weighs 4.2 kg/m and has Ix = 203.2 cm⁴; the 40x160L weighs 5.5 kg/m and reaches 466.7 cm⁴: more than twice the stiffness for little extra weight. Choose the 40x160L for longer spans or higher loads.

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.