1/4 inch hex bit holder generator
A friction-fit hex socket needs about 0.4 mm of clearance over the 6.35 mm across-flats of a 1/4" bit. The generator lets you tune that in 0.05 mm steps and lays out any grid you like, optionally tilted for easier grabbing.
Building the model
Loading the 3D view
No adjustable sizes
Ask for the sizes you want to tweak, e.g. “make the width adjustable”.
Specs at the default size
Measured from the actual build on a Bambu Lab A1 in PLA. Every number updates live when you drag a slider above.
- Overall size
- 94 × 28 × 15 mm
- Parts
- 1
- Filament
- 17 g
- Print time
- 28 min
- Build plates
- 1
- Supports
- None needed
Engineering checks
- Bit fit clearance0.40 mm over 6.35 mm AF
Adjustable sizes
| Setting | Default | Range |
|---|---|---|
| Columns | 8 | 1–20 |
| Rows | 2 | 1–8 |
| Pitch | 11 mm | 9–16 mm |
| Socket depth | 12 mm | 6–25 mm |
| Row tilt | 0 ° | 0–30 ° |
| Hex hole across-flats | 6.75 mm | 6.45–7.1 mm |
How to make it
- Choose rows and columns.
- Print a 1×2 test first and adjust Hex across-flats.
- Print the full holder.
Print tips
- PLA, 0.2 mm layers; sockets print cleanly without supports.
FAQ
Bits too loose?
Lower the hex across-flats value by 0.05 mm. Too tight: raise it.
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