Skip to Content
  1. All Products
  2. AL Modular System
  3. Strut profiles
  4. Slot C6 (6 mm)
  5. Aluminium strut profile 20x40

Aluminium strut profile 20x40

https://leanproducts.eu/web/image/product.template/2802/image_1920?unique=1d9bc53

Anodised aluminium strut profile 20x40 mm with six 6 mm slots: stiffer than the 20x20 in one direction, for crossbars, reinforcements and light frames. 0.8 kg/m, 3000 mm bar or cut to length from 50 mm.

Read more ↓
Code: 3842992891
Length: 3,000
  • Brand
  • Section mm
  • Slot mm
  • Max length mm
  • Alloy
  • Production method
  • Surface treatment
  • Coefficient of thermal expansion
  • Tensile strength
  • Yield strength
  • Elongation at break
  • Modulus of elasticity E
  • Brinell hardness
  • Straightness tolerance
  • Torsion tolerance
  • Min length mm
  • Cross-section area cm²
  • Moment of inertia Ix / Iy cm⁴
  • Section modulus Wx / Wy cm³
  • Torsion factor It cm⁴
  • Torsion factor Wt cm³
  • Length
  • Weight
  • Material

Cut dimensions

mm
40 × 20 mm Real profile section
0Full bar 3000 mm
Calculating price…
Full bar Full sheet of the sheet From {min} to {max} mm · full bar {max} mm Up to {maxl} × {maxw} mm · minimum {min} mm Length between {min} and {max} mm. Width between {min} and {max} mm.

This combination does not exist.

Log in to see prices and buy
You have already submitted a query for this product today.
Contact Us
Request a quote
We reply within 1 working day
Download PDF data sheet

Specifications

Brand Bosch Rexroth
Section mm 20x40
Slot mm 6
Cross-section area cm² 2.9
Moment of inertia Ix / Iy cm⁴ 4.6 / 1.2
Section modulus Wx / Wy cm³ 2.5 / 1.4
Max length mm 3000
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 0.68
Torsion factor Wt cm³ 0.91
Min length mm 50
Length 3000
Weight 0.8 kg/m
Material Anodized aluminium

With the 40 mm side vertical: the moment of inertia is 4.6 cm⁴, compared with 1.2 cm⁴ with the profile flat. For the same load and span an upright crossbar deflects almost four times less.

Only for light loads and mounted on edge: in its plane it has Ix = 3.2 cm⁴, flat barely 0.2 cm⁴. For a 20 series cross member choose the 20x40, which has the same width.

The bracket 20x40 for 6 mm slot: it is fixed with four M4x8 screws tightened to 3 N·m and holds 1400 N. If you order it without screws and nuts, add four M4 screws and four M4 nuts per joint to the parts list.

The 20x40 is rigid mainly in one direction (Ix 4.6 cm⁴, Iy 1.2 cm⁴). The 20x40x40 has 6.0 cm⁴ in both directions and It 1.5 cm⁴: it is the corner post for light structures loaded from several sides.

The 20x60 is for longer or more heavily loaded crossbars: Ix 14.2 cm⁴, about three times the 20x40, at 0.9 kg/m instead of 0.8. For short spans the 20x40 is enough and more compact.

With two cover caps 20x20 side by side, signal grey or black ESD: they cover the cut and the slots.

Those for the 6 mm slot: M4 T-nut (1700 N) or M4 and M5 sliding block (3000 N). They are the same as for the 20x20: in a 20 series structure you need only one type of small parts.

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.

Accessory Products