Okidata ML421 Serial DOT Matrix Printer - Black
Part #: 92009703
UPC: 051851450407



List Price: $751.00 
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Okidata ML421 Serial DOT Matrix Printer - Black
Manufacturer Part #: 92009703

The Oki ML421 offers:

  • Wide Carriage
  • 9 Pin
  • Print speeds up to 570cps
  • Parallel, Serial and USB ports
  • 3 Year Warranty


Rated at 20,000 hours MTBF
3-Year standard warranty
Print speeds up to 570 cps 1
Integrated USB and IEEE Parallel connectivity standard
Optional OkiLAN 6120i 10/100 Base-T Ethernet internal print server
Crisp, clear printing on 6-part forms
Expandable head gap - accommodates multi-part forms and cut-sheet stock including labels and stiff index stock
4 million-character ribbon life
200-million character printhead life
Small footprint - ideal for retail countertops
Uses the same accessories as ML320/321 Turbo Series

1SuperSpeed Draft Mode.

The fast, rugged dedicated forms printer designed to perform in demanding environments.

Doing the job day after day.
The OKI MICROLINE 420 9-pin printer and its wide-carriage counterpart ML421 are a quantum leap forward in Impact printer performance.

Engineered for dedicated forms printing in the most demanding point-of-sale, automation and utility environments, ML420/421 printers are right at home in applications such as retail sales counters, medical facilities, automotive rental and repair shops, airline counters, financial departments and manufacturing sites. Their print speed and versatile paper handling make them ideal for the office, too.

Performance is built in.
The ML420/421 sport features that give them a strong edge over their predecessors as well as the competition:
  • 3-piece top cover provides easy access and unsurpassed break resistance
  • An internal cooling fan provides continuous airflow for the printhead - maximizing throughput productivity for long, unattended print jobs
  • Additional feed rollers provide precise forms handling and printed-character placement accuracy

  • Exceptional paper-handling versatility.
    The ML420/421 have a zero-tear feature that accurately positions continuous forms for a clean tear at the perforation, which eliminates wasted stock. You also get perfect results with single sheets, index stock, labels and envelopes, too. All with-out jams or smears.

    Value that goes the distance.
    The OKI ML420/421 deliver the kind of productivity usually reserved for printers many times the price - starting with a super-fast print speed of 570 characters-per-second (in SuperSpeed Draft mode).

    Then there's the rugged printhead with its 200-million character life, powerful samarium cobalt magnets and stored-energy pins delivering precise, sharp characters all the way through to the last page of a 6-part form. And the patented OKI closed-loop feedback system that assures character placement accuracy...

    The OKI ML420/421: Just turn 'em on and turn 'em loose.

    Built to last, inside and out.
    Field-proven reliability is just one reason OKI MICROLINE impact printers are the most widely-used in North America.

    The performance-optimized power supply of the ML420/421 has been enlarged to easily handle harsh printing conditions and its energy management capabilities match power expenditures to print-job size, maximizing the life of the 9-pin printhead and other components. A long-lasting rack-and-pinion drive system ensures print quality longer than belt or cable systems. And the ergonomically-designed, impact-resistant chassis protects the ML420/421 from damage, even in the toughest working environments.

    Performance that's user-friendly.
    Controls are conveniently placed on the front panel for fast access. The automatic loading of continuous and cut stock makes every print job easier, and the design of the internal sheet separator enables easy loading of tractor-fed paper into the rear push tractor.

    OKI has a reputation for quality and reliability no competing printer can claim and backs it with 3 years of warranty coverage and a network of authorized OKI Dealer Service Centers and Service Depots.

    The reliable, affordable ML420/421 can work wonders in virtually any forms-handling application.


    Okidata ML420 / ML 421 Printers
    Technology, Speed and Print Characteristics
    Printhead 9 Pin
    Graphics Resolution 240 (H) x 216 (V) dpi maximum
    Feed Rate 4.5 ips (11.4 cm/sec.)
    Print Speed SSD, 12cpi - 570cps
    Emulation,Interface and Memory
    Emulation Epson FX, IBM ProPrinter, OKI MICROLINE
    Standard Interfaces IEEE 1284 parallel and USB
    Optional Interfaces RS-232C Serial (Standard on Serial Models)
    Optional Network Interfaces OkiLAN 10/100 Base-TX Internal Ethernet Print Server (Standard on Network Models)
    Standard Memory 128K
    Operating Systems Windows® XP, 2000, 98 and 95, NT 4.0 and most other operating systems
    Paper Handling
    Paper Input Single-part, Multi-part, Continuous forms, Cut sheet, Index stock, Envelopes, Labels
    Number of Copies 6
    Thickness 0.017" (0.43 mm) maximum
    Paper Feeding Rear Push and Friction Feed
    Options Bottom Push Tractor, Top Pull Tractor, Cut Sheet Feeder, Roll Paper Stand
    Operating / Physical Specifications
    Dimensions w/out Box (W x D x H) (inches) ML420: 15.7 x 13.6 x 6.0
    ML421: 21.7 x 13.6 x 6.0
    Weight (lb.) ML420: 16.4
    ML421: 21.2
    Acoustic Noise 56dBA
    Warranty 3-Year parts and labor, 2-Year printhead
    MTBF 20,000 hours (25% duty cycle / 35% page density)
    Printhead Life 200 million characters
    Ribbon Life 4 million characters



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