Asarto Drum Unit for Brother 3400DN DR3400 50,000 pages Black

Asarto drum unit compatible with Brother 3400DN (DR3400) in black is a replacement imaging drum designed for monochrome laser printers. Rated for approximately 50,000 pages, the unit transfers toner images from the toner cartridge to paper and is intended for routine maintenance and part replacement to restore print quality and extend the service life of office and workgroup devices.

Advantages

The drum unit provides consistent image transfer and is engineered to match the operational cycle of high-performance monochrome printers. With an estimated yield of 50,000 pages, it reduces the frequency of drum replacements and supports predictable maintenance intervals. The unit is designed to be installed without special tools and maintains stable print density and sharpness throughout its rated life.

Suitable for

• Monochrome laser printing in small to medium offices
• Workgroup printers with moderate to high monthly page volumes
• Routine maintenance and scheduled part replacement
• Restoring uniform print quality and reducing background artifacts

Key specifications

• Color: Black (imaging drum for monochrome output)
• Typical yield: approximately 50,000 pages
• Function: image transfer drum for laser printing
• Compatibility: designed for use with Brother 3400DN series monochrome printers
• Form factor: replaceable drum unit for user-level maintenance

How to use

Turn off the printer and allow it to cool before replacing the drum unit. Open the printer cover, remove the toner cartridge assembly as described in the printer manual, then take out the spent drum unit. Unpack the replacement drum and, if applicable, remove any protective tape or covers. Install the new drum unit in the correct orientation, reinsert the toner cartridge assembly, close the cover, and power the printer on. Follow any on-screen or manual prompts to reset the drum counter if required by the printer model.

Usage recommendations

For consistent results, use the drum unit in combination with compatible high-quality toner cartridges and follow the printer manufacturer's maintenance schedule. Store spare drum units in a dry, dust-free environment away from direct sunlight and extreme temperatures. Replace the drum if you observe streaking, ghosting, or a decline in print density before the rated page count.