Triple Pulley Block (3x608) – Ascent Zero 3

Compact triple pulley block for paracord rigging.
Needs 3×608; includes Zero axle + M5 option for PETG-HF.

Ascent Zero 3 Notes

• If you print my profile you will get a very dense and sturdy print. However, because of the slight variations in expansion of PLA and PETG at these very high infill percentages, it is unlikely that you can assemble this by hand without a little hammering. These printed great for me with Bambu Basic PLA on an A1-Mini using my profile the parts had just the right tightness.
• The compression fit axles are keyed so they are easy to insert correctly but to get them all the way in you'll need to bash it lightly with a plastic hammer (ideal) or the butt of a screwdriver, or a regular metal hammer. 
• The wheel is meant to be a very tight fit around the bearing. Some hammering may be required.
• Once the axles are sunk in flush and the body halves are fully mated, you should have a very strong pulley ready to do some light-duty work. 
• I've tested this model in Bambu's PETG HF and the finished parts are so slick that the compression axle does not perform as intended. For PETG of this type I strongly suggest printing the M5 bolt variant.

NEW Hardware Version for PETG-HF (June 19, 2025)

Ascent 3 M5 x 16mm Notes

• Best option for Bambu PETG-HF
• Hardware Requirements BOM
  • 3x 608 Bearing
  • 3x M5 x 16mm Hex Socket Head Cap Bolts
  • 3x M5 Thin Hex Nut

Related: Ascent Zero - Double Pulley