Folding Ruler Extension for Inner Dimension Measurement (Parametric)
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A parametric extension to measure inner dimensions with a folding ruler.
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Updated at source:
Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
How does it work?
Printing
The model will fit most off-the-shelf folding rulers. Anyway, you can use the CAD file to adapt it to the size of your ruler.
Assembly
You'll need an additional M4x10 screw.
Tap an M4 inner thread into the hole on top of the extension or use brute force initially to screw the M4 screw in.
Usage
Slide the extension over the end segment of your ruler. Fold out the ruler, and slide out the extension, so that your ruler plus extension exactly fit the inner dimension you want to measure. Use the screw to fix it in place.
Fold back the folding ruler, so it extends past the sliding ruler.
Read the extension's overstand and add it to the measurement from the folding ruler.