Ribbon tape LAMBDA for OKI 5520/5521/5590/5591 (model L-OK5520) — black, 4 million characters

Replacement black ribbon tape LAMBDA L-OK5520 for OKI 5520, 5521, 5590 and 5591 dot matrix/impact printers. This ribbon tape is designed to deliver up to 4 million printable characters, offering long service life and consistent black contrast for high-volume, continuous printing tasks such as invoices, receipts, reports and industrial forms. The tape is compatible with the specified OKI models and fits standard cartridge mounts for those printers, providing a straightforward replacement option to restore clear, legible output.

Advantages

The ribbon provides extended durability with up to 4 million characters, reducing the frequency of replacements and downtime. It delivers stable black print density across the ribbon’s lifetime, ensuring readable text and reliable contrast on multi-part forms and plain paper. The tape is manufactured for compatibility with the listed OKI impact printers and is packaged to simplify installation and handling.

Suitable for

• High-volume invoice and receipts printing
• Accounting and financial reports generated on dot matrix printers
• Multi-part industrial or logistics forms requiring carbon copy capability
• Point-of-sale and back-office continuous stationery print jobs

Key specifications

• Color: Black
• Estimated yield: up to 4,000,000 printable characters
• Printer type: Dot matrix / impact printers
• Compatibility: OKI 5520, 5521, 5590, 5591 models
• Form factor: Ribbon tape suited for standard cartridge mounts of listed printers

How to use

Turn off the printer and open the ribbon access cover according to the printer manual. Remove the spent ribbon cartridge and install the LAMBDA ribbon tape into the cartridge slot, aligning the ribbon with the print head path and ensuring correct tension. Close the cover and run a test print to confirm proper installation and print quality. Follow the printer manufacturer’s guidelines for handling and disposal of used ribbon material.

Usage recommendations

For best results, use the ribbon tape in environments within the printer’s recommended temperature and humidity ranges and store spare ribbons in a cool, dry place away from direct sunlight. Replace the ribbon when print density decreases or characters begin to fade to maintain document legibility, especially on multi-part forms.