KM 2550
Cataloged under a suffixed name, this page is the alternate listing of Kyocera's KM-2550 monochrome multifunction — the store entry carries the -1 marker, but the hardware is the familiar KM-2550: same engine, same capabilities, same toner. That toner is the TK-421 (TK421) black cartridge, rated at approximately 15,000 pages per ISO/IEC 19752. Buyers comparing the two listings will find fully interchangeable cartridges and identical performance characteristics; the suffix distinguishes the catalog entry, not the machine in the box.
One platform under two catalog names could be a recipe for supply confusion, and the point of this page is that there is none. Whichever listing a KM-2550 owner orders from, the TK-421 is the cartridge that arrives and the cartridge that fits. At roughly 15,000 pages per unit, it is a long-yield supply that keeps a departmental copier-printer available for weeks of ordinary work between changes.
Toner Cartridges for KM 2550
| Cartridge | Color | Page Yield |
|---|---|---|
| TK-421 (TK421) — 2 pack | Black | ~15,000 pages per cartridge |
| TK-421 (TK421) — 4 pack | Black | ~15,000 pages per cartridge |
Which cartridge should you buy?
Both listings carry the same TK-421 cartridge, so choose by how the machine is worked. The 2 pack — about 30,000 pages across two cartridges — gives a single department a working reserve, so a toner warning never waits on a delivery. The 4 pack stretches that to roughly 60,000 pages and lowers the cost per page, suiting shared copier rooms and anyone who prefers to order supplies a few times a year. Either way, the cartridge that arrives is the one this engine was built around.
Chip, toner and everyday use
Seat the TK-421 fully so the machine can read its chip and track the toner level from the first page. The ~15,000-page rating is measured at about 5% coverage under ISO/IEC 19752; copy-heavy days with dense originals will draw it down sooner than light print work. If output turns faint near the end of a cartridge, rocking it gently side to side can redistribute the remaining toner for a final run of pages. Keep the next pack sealed, flat and stored away from heat until swap day.
Frequently Asked Questions
Which toner does this KM-2550 listing use?
The TK-421 black toner cartridge, rated for approximately 15,000 pages per ISO/IEC 19752 at roughly 5% coverage.
Is this the same machine as the KM-2550?
Yes. This is the alternate catalog listing of the KM-2550 — same engine, same TK-421 toner, same capabilities. The -1 distinguishes the store entry only.
Does the CS 2550 take the same cartridge?
It does. The CS 2550 runs on the same TK-421, so sites operating both nameplates stock a single toner.
How many pages will one TK-421 print?
Approximately 15,000 pages at about 5% coverage. Jobs with heavy coverage yield fewer pages; light text work can run longer.