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Overview

The Hex Flower Wrench is a compact, printed tool designed to positively engage the 24 mm Hex Flower nut variant used on the OSSM actuator. Use it when you need more control than hand‑tightening provides.
  • Interfaces with the Hex Flower pattern for secure grip
  • Applies additional torque safely beyond hand-tight
  • Aids in controlled loosening without slipping
  • Slim profile for easy storage with your OSSM kit
This wrench is only needed for the Hex Flower nut variant. The standard 5‑sided nut is intended for hand‑tightening only and does not use this tool.

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Compatibility

  • Fits: 24 mm Hex Flower nut variant for OSSM
  • Does not fit: Standard 5‑sided nut or other non‑Hex Flower profiles
If you are unsure which nut you have, compare your nut’s face to the STL preview above. The Hex Flower nut shows a repeating “flower” contour rather than straight flats.
These settings balance strength and print time for a durable tool. Adjust to your printer and filament.
  • Material: PETG or ABS/ASA recommended for heat and impact resistance; PLA+ works but is more brittle in high‑torque/warmer environments
  • Layer height: 0.20 mm (0.16 mm for tighter dimensional accuracy)
  • Perimeters (walls): 4–6
  • Top/bottom layers: 6–8
  • Infill: 40–60% (Gyroid/Cubic recommended)
  • Orientation: Lay the wrench flat on the bed so the Hex Flower face prints upward; this aligns layer lines to resist torque
  • Supports: Not required for most slicers; enable only if your preview shows sagging in the cavity
  • Adhesion: Skirt or brim as needed for bed adhesion
This is a printed tool. Do not use cheater bars, impact drivers, or power tools. Excessive torque can crack the wrench or damage the nut.

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Prepare and use

1

Slice and print

Slice the STL with the settings above and print in PETG/ABS/ASA for best durability.
The part should come off the bed flat with clean cavity edges and no layer separation.
2

Deburr and test‑fit

Remove any strings or burrs from the Hex Flower cavity. Gently test the fit on the nut without force.
If the fit is tight, a light pass with fine sandpaper (320–600 grit) on the cavity walls usually resolves it.
3

Tighten the nut

Seat the wrench fully onto the Hex Flower nut. Hold the mating parts steady and turn the wrench clockwise to snug.
Stop at snug‑tight. Printed tools are for moderate torque; over‑tightening can cause cracking.
4

Loosen the nut

To remove, seat the wrench fully and turn counter‑clockwise while supporting the assembly to avoid side‑loading.
After loosening, inspect the wrench for whitening, cracks, or deformation before using it again.

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Care and maintenance

  • Inspect before each use for cracks, layer splits, or rounding of the cavity
  • Retire and reprint the tool if you see damage or excessive wear
  • Store flat, out of direct heat or sunlight to preserve material strength

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Troubleshooting

  • Verify you have the Hex Flower nut variant (not the 5‑sided nut)
  • Check for print elephants’ foot; lightly chamfer the cavity edge with a knife or sandpaper
  • Reduce horizontal expansion/XY compensation in your slicer by 0.05–0.15 mm and reprint
  • Ensure the wrench is fully seated before turning
  • Increase wall count to 6 and infill to 60% and reprint in PETG/ABS/ASA
  • Replace the wrench if the cavity shows rounding or glaze
  • Reprint in a stronger material (ABS/ASA or PETG) with more perimeters and higher infill
  • Reorient to print flat (face up) so layers resist torsion
  • Reduce applied torque; do not use extensions or power tools

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Download files

STL File

Download for slicing

STEP File

For CAD modification