Mecalac / Liebherr Excavator Window Holder – Reinforced (PETG, Steel Rod 10 mm)

This is a reinforced window holder designed for excavator cabins.

The part was:

• ✅ Tested on: Mecalac 12

• ✅ Also fitted to: Liebherr 900B

• ⚠ May fit other machines using similar window mounting geometry

The design is strengthened compared to OEM-style plastic holders and intended for long-term use in demanding working conditions.

Key features

• Reinforced body

• Steel core for load transfer

• Suitable for heavy cabin glass

• Designed for PETG printing with 100% infill

Required hardware

⚠ Mandatory – not optional

• Steel rod: Ø 10 mm
  → must be press-fitted into the printed holder

• Thread: M8
  → internal thread required in the printed “nut” part

⚠ Do NOT use without the steel rod – the rod is a structural element.

Print settings (tested)

• Material: PETG

• Infill: 100%

• Layer height: 0.20 mm

• Perimeters/Walls: 4–5 recommended

• Supports: No (depending on orientation)

• Printer: FDM (tested on consumer-grade machine)

Assembly instructions

1. Print all parts with 100% infill.

2. Cut a 10 mm steel rod to the required length.

3. Press-fit the rod into the holder (vise or press recommended).

4. Thread the printed nut to M8 (tap required).

5. Assemble the holder on the window mechanism.

Notes

• PETG is recommended for:

  • vibration resistance

  • temperature changes

  • outdoor / industrial environment

• PLA is not recommended.

• If press-fit is too tight or loose:

  • adjust XY compensation (±0.05–0.1 mm)

• Check alignment before final installation on the machine.

Disclaimer

This is a non-OEM replacement part.
Use at your own responsibility and always verify fitment before operation.