Name: Aluminium strut profile 40x40L R
Brand: Bosch Rexroth
SKU: 3842993184

AL Modular System · C10 profiles

Aluminium strut profile 40x40L R

The 40x40L R is the radiused corner profile of the 40 series: the back is rounded, the two 10 mm slots are on the inner sides. Mount it at the corners of frames, covers and guards when you want a soft corner, without sharp edges and without slots facing outwards. It connects with the C10 accessories of the 40 series.

Section 40 × 40 mmRadiused back2 slots of 10 mm1.3 kg/mIx = Iy 7.2 cm⁴

Why choose it

Rounded corner

Radiused outer edge: clean look and no sharp edges facing the operator.

Two inner slots

The slots face into the structure, where you fix panels and crossbars.

Lightweight

1.3 kg/m, the lightest 40x40 in the series.

Technical data

Property	Value
Code	3842993184
Section	40 × 40 mm
Slot	10 mm (C10)
Cross-sectional area	A = 5.0 cm²
Weight	1.3 kg/m
Moment of inertia	Ix 7.2 cm⁴ · Iy 7.2 cm⁴
Section modulus	Wx 3.6 cm³ · Wy 3.6 cm³
Torsion	It 2.50 cm⁴ · Wt 2.00 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	Dedicated cover cap 40x40 R, grey or black ESD (on request)
Series	40 series (40 mm modular dimension)
Standard machining	M12 thread in the central bore, DB17 in the two slots
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

Aluminium strut profile 40x40LProfile 40x40L with four slots

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	40x40
Slot mm	10
Cross-section area cm²	5.0
Moment of inertia Ix / Iy cm⁴	7.2 / 7.2
Section modulus Wx / Wy cm³	3.6 / 3.6
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
Torsion factor It cm⁴	2.50
Torsion factor Wt cm³	2.00
Min length mm	50
Length	6070
Weight	1.3 kg/m
Material	Anodized aluminium

You need the dedicated cover cap 40x40 R, grey or black ESD, which follows the radius: the normal 40x40 cover cap does not fit. Ask for it together with the profiles.

On the outer edges of frames, cabins and covers, where you want a rounded corner. The two inner slots take panels, brackets and crossbars like a 40x40L.

Yes: the central bore is threaded M12 as standard machining; DB17 machining in the two slots is also available.

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.