Heat-set insert hole size tester
Heat-set inserts need a hole that is just right: too small and the wall bulges or cracks, too big and the insert spins. This block puts five hole sizes around the catalog value side by side so one quick print tells you the answer.
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
- 60 × 16 × 9 mm
- Parts
- 1
- Filament
- 5 g
- Print time
- 11 min
- Build plates
- 1
- Supports
- None needed
Engineering checks
- Middle hole is the catalog size4.1 mm for M3
Adjustable sizes
| Setting | Default | Range |
|---|---|---|
| Insert size | M3 | — |
| Step between holes | 0.15 mm | 0.05–0.3 mm |
| Wall around each hole | 3.5 mm | 2–6 mm |
How to make it
- Pick your insert size.
- Print the block in your real filament.
- Press an insert into each hole with a soldering iron at about 220 °C.
- Use the hole that grips firmly without bulging.
Print tips
- 3 walls around the holes, like your real parts.
- About 12 minutes and a few grams.
FAQ
Which insert brands does it fit?
It's centred on common short M-series inserts; the step size lets you bracket any brand.
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