Rear engine support bolted to the main frame
PRODUCT: ENGINE CROSS MEMBER RR – Rear engine support
Structural aluminum component designed as the rear engine support, bolted directly to the vehicle’s main frame. The part is produced as a cast aluminum component with variable wall thickness and requires strict control of porosity, roughness and geometric stability.
Mass: ~6,5 Kg Dimension: ~400 × 130 × 80 mm
Material: Aluminum alloy EN 1706 – AC-43100 ST6
Raw part obtained per: Gravity / shell casting with porosity control (Porosity class 1.2 – DBL 4949)
Finished part obtained via: Machining + Deburring (shot-blasting or fine grinding allowed) + Dimensional and roughness inspection (Rz 100)
Challenge: ensure crack-free casting and geometric stability over lengths > 350 mm
OEM: Mercedes-Benz (ENGINE CROSS MEMBER RR – MOTORQUERTRAEGER HI)
PROJECT OVERVIEW
The Cross Member is a rear engine support, responsible for transferring loads to the main frame and ensuring stability of the powertrain assembly.
Throughout the project TECNOFOR managed:
- development of the AC-43100 ST6 aluminum casting process with controlled porosity (Porosity class 1.2)
- compliance with ISO 2768-m tolerances and shape specifications (3° draft angle, raised form up to 0.5 mm allowed)
- machining operations on complex geometries and long dimensions (>350 mm)
- deburring and finishing (shot-blasting or fine grinding allowed)
- control of surface roughness Rz 100 on functional areas
- integration of MBN 10435 markings and identification requirements (Smaragd, EVT, SAG 82321)
The result is a robust engine support, fully compliant with Mercedes-Benz specifications and ready for installation on the main frame.
PRODUCT EXAMPLES
Engine supports and structural aluminum components developed and validated with European Tier1 and OEM manufacturers.
NEXT PROJECT
Battery Box Plates – Internal reinforcement for heavy-duty battery housings
