Yes, toner cartridges and drum units for Brother printers are sold separately. The toner cartridge is the container that holds the toner powder. The drum unit is an electrically charged cylinder that transfers that toner powder to paper to create text and images. The Brother toner cartridge fits into the drum unit and the two parts work together to produce a print. If your printer uses a TN660 toner cartridge, for example, it also uses the DR630 drum unit. Consult your printer’s user manual to find the appropriate products for your machine.
This is what a drum unit with a toner cartridge looks like:
This is what a drum unit looks like without the toner cartridge:
To see how a Brother toner cartridge fits into the drum unit, view our installation video here:
Drum units typically need to be replaced after the use of 3-4 toner cartridges. Your printer will inform you when it is time to replace your drum. To learn more about your toner cartridge and drum, read our article: the difference between a toner cartridge and a drum unit.