This Strong Expandable Hex Pulley System is a fully modular block and tackle designed for strength and flexibility.

• In the basic PLA version, it can easily lift 60 kg (≈132 lbs) without any issues. It is likely capable of lifting more, but higher loads have not yet been tested.
• When printed with stronger materials such as ABS, PA6-CF, or similar, and with pulleys made from tougher fila
• ments (e.g. PETG, nylon composites), the lifting capacity can be increased even further.

Hardware & Assembly

• Bolts & Nuts (basic version):
  • 2 × M4 × 50 mm bolts + matching nuts
  • 1 × M8 × 60 mm bolt + nut
• Bearings: 2 × 608 bearings
• Expansion: When expanding the system, all bolts need to be replaced with longer ones.

Rope Compatibility

• Designed for a 10 mm rope, but there is still extra clearance.
• A 12 mm rope fits as well and possibly larger, but this needs further testing.

Key Features

• Modular & expandable design – add more pulleys by extending with longer bolts.
• Honeycomb hex pattern for reduced weight and improved aesthetics.
• Strong lifting capability even with standard PLA prints.
• Easy to assemble with common hardware.