Askania Micro Ruler vintage drafting tools
Product details
| Management number | 62648612 | Release Date | 2026/03/03 | List Price | $21.00 | Model Number | 62648612 | ||
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This Micro-Ruler is a specialized precision tool used to measure small, flat objects with an accuracy of up to one-thousandth (0.001) of an inch. Based on the instructions printed directly on the ruler's sleeve, it functions using a combination of a central grid and a side scale to provide its high-precision readings.
How to Use the Micro-Ruler
The measurement process involves three key steps as outlined on the device:
Placement: Lay the object you wish to measure underneath the ruler's grid.
Alignment: Position the object so it is tangent to the "CM-scale" on the right and also touches one of the sloping lines in the grid on the left.
Reading:
First Digit: Read the index figure of the specific sloping line the object is touching on the left.
Second and Third Digits: Read these off the CM-scale on the right side.
Result: Combine these to get the final dimension in thousandths of an inch (e.g., an index of 4 on the left and 36 on the right results in a reading of 436, which equals 0.436
| Category | Other > Other |
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| Size | N/A |
| Brand | None |
| Condition | Good |
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