PETRA 8-Digit Auto Numbering Machine Heavy-duty, self-inking metal stamp used for sequential serialization and coding

Key Performance Specifications

• Digit Capacity: 8 rotating wheels allowing sequential serialization from 00000001 up to 99999999.
• Frame Build: High-strength stainless steel structure paired with a chrome polish finish to handle heavy impacts in warehouses and mailrooms.
• Inking System: Integrated self-inking felt cartridge that automatically inks the metal typefaces between every single compression.
• Ergonomics: Wide, shock-absorbing top handle that reduces palm strain during high-volume operations.

Advanced Movement Settings (Multi-Shift System)

The machine features an adjustable internal action-indicator lever. This permits the operator to set how many times a single number stamps before advancing to the next sequential digit:

• Consecutive (0): Advances by 1 on every single stamp (e.g., 1001, 1002, 1003).
• Repeat (0): Locks the current sequence to stamp the exact same number indefinitely.
• Duplicate (2): Stamps the same number twice before advancing (ideal for carbon copy or duplicate invoicing).
• Multi-Repeat: Configurable to shift digits automatically after 3, 4, 6, or 12 continuous impressions.

Step-by-Step Operation Guide

1. Locking the Frame: Compress the handle halfway down and push the side lock button. This locks the digit wheels away from the ink pad for safe configuration.
2. Setting the Starting Number: Use the included plastic stylus stick to rotate the metal wheels forward until your chosen starting number is aligned.
3. Dropping the Ciphers (Leading Zeros): If you prefer to print 45 instead of 00000045, press the leading zero wheels slightly forward and downward using the stylus to drop them out of printing alignment.
4. Priming the Ink: Slide out the ink pad cradle, apply 5–6 drops of oil-based metal stamping ink evenly across the pad surface, and slide it securely back into place.
5. Stamping: Release the frame lock by firmly pushing the handle all the way down once. Align the base plate indicator rails with your document lines and stamp using a smooth, fluid vertical motion