Extrusion Tolerances Technical data – extrusions: Material description: A= measuring plate Minimum tensile strength Rm (in direction of pressure): Yield strength Rp (in direction of pressure): Coefficient of linear expansion: Brinell hardness: Breaking elongation A5: Material density: Cutting data: Length tolerance (up to 6000 mm): Rectangular accuracy: measuring plate Tolerances for precision extrusions: Groove tolerance: measuring plate Modulus of elasticity Load Net weight Deflection Length Moment of inertia (see extrusion data sheets) Section modulus (see extrusion data sheets) Permissible bending stress (recommendation 70 N/mm2) Torque Torsional moment of area Sheer Modulus Rotation angle

Deflection Calculations Load case example 1 Load case example 2 Load case example 3 Deflection under own weight FG · L3 Deflection under own weight Deflection under own weight f= Torsion Calculations Load case example 1 L Mt Load case example 2 L Mt Checking the shear stress The critical factor for failure of an extrusion subject to torsional load is in practice not so much the exceeding of the maximum approved torsional load applied to the extrusion, but rather elastic deformation (torsion). This deformation will affect the functioning of any parts to be assembled onto the extrusion, and so...