Metal Letter Stamping Jig Precision Alignment Tool

This project is a manual alignment and stamping jig designed for 3 mm metal letter stamps, allowing clean, straight, and evenly spaced lettering on metal plates.

The jig is fully 3D printed in PLA and works as a guided manual press, ensuring that each letter stamp remains:

• vertically aligned,
• evenly positioned,
• and perpendicular to the work surface.

The system is especially useful for steel (stainless) nameplates, tags, labels, or samples, where free-hand stamping often leads to misalignment or uneven depth.

The stamped steel plate shown in the photos (“MASTER”) is  an example of the achievable result.

Key Features

• Designed specifically for 3 mm metal letter stamps
• Linear sliding carriage with rack-guided alignment
• Square anti-rotation holder for accurate stamp orientation
• Manual downward force only (hammer or hand press on wood or leather)
• Optimized for repetitive, clean lettering

No electronics, no calibration, no consumables

How to Use (Important)

• Place the jig on a very solid, non-flexing surface
  → A heavy steel mass, an anvil, or a thick steel block is mandatory.
  ❌ Do not use on a desk, wooden table, or any flexible surface.
• Position the metal plate on the steel backing surface inside the jig.
• Insert a 3 mm metal letter stamp into the square holder, ensuring it is fully seated and vertical.
• Slide the carriage to the desired position and hold it firmly.
• Using a heavy hammer, apply one single, straight, controlled удар (strike) on the stamp.
  → Do not tap multiple times.
  → Do not use light or angled hits.
• Move the carriage to the next position and repeat for each letter.