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Okidata MicroLine 421N - 9 PIN MATRIX PRINTER/NET
*Images may show options not included in price. Okidata MicroLine 421N - 9 PIN MATRIX PRINTER/NET customers choose us for our low prices

Okidata MicroLine 421N - 9 PIN MATRIX PRINTER/NET

  • Printer

Model No.:62418803


Availability: Out Of Stock

Shipping:Ask About Free Shipping!

The performance-optimized power supply of the Okidata ML-421N has been enlarged to manage harsh printing conditions easily. The ML 421N Printer's energy management capabilities match power expenditures to print-job size, increasing the life of the 9-pin printhead and other components. The ML421N features a long-lasting rack-and-pinion drive system that provides print quality longer than belt or cable systems.



Printers do not include supplies - toners , drums (where applicable) , printer cables , manuals , consumables , trays (where applicable). Power cables are included. Drivers can be downloaded at Please verify that drivers available are compatible with your software on HP’s site.

Product Details




Product Details


Doing the job day after day. The OKI MICROLINE 421 9-pin wide-carriage printer is a quantum leap forward in Impact printer performance. Engineered for dedicated forms printing in the most demanding point-of-sale, automation and utility environments, ML421 printer is 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 ML421 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 ML421 has 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 ML421 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 ML421: 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. The performance-optimized power supply of the ML421 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 ML421 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 has a network of authorized OKI Dealer Service Centers and Service Depots. The reliable, affordable ML421 can work wonders in virtually any forms-handling application.

Main Features

  • Print speeds up to 570 cps 
  • 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 
  • 128 KB receive buffer / memory 
  • 4 million-character ribbon life 200-million character printhead life 
  • Small footprint ideal for retail countertops.


Connectivity Technology: Wired
Interface: Ethernet 10/100Base-TX , Parallel , USB
Language Simulation: EPSON FX , IBM Proprinter III , Okidata Microline
Max H-Document Size: 16 in
Max H-Resolution B/W: 240 dpi
Max Media Size (Standard): continuous paper 4 in - 16 in (width)
Max Media Weight: 90 g/m2
Max Printing Speed: 570 char/sec
Max Sheets in Multi-Part Form: 6
Max V-Resolution B/W: 216 dpi
Media Sizes: continuous paper 4 in - 16 in (width)
Media Thickness Range: up to 0.014 in
Media Type: Continuous forms , Envelopes , Index cards , Labels , Plain paper
Min Media Weight: 45 g/m2
Monthly Duty Cycle: 17000 pages
Monthly Duty Cycle Range (Printer Class): 10,000 - 19,999 pages
Output Type: Monochrome
Printhead Type: 9 pin
Technology: Dot-matrix
Type: Workgroup printer
Printer Output
Max Speed: 570 char/sec
Output Quality: Max speed
Resolution: 12 cpi
Max Speed: 510 char/sec
Output Quality: Fast draft
Resolution: 10 cpi
Max Speed: 380 char/sec
Output Quality: Normal
Max Speed: 95 char/sec
Output Quality: Near letter
Interface Required
Connector Type: 36 pin Centronics
Total Qty: 1
Type: Parallel
Connector Type: 4 pin USB Type B
Type: USB
Connector Type: RJ-45
Type: LAN
Brand: OKI
Compatibility: PC
Manufacturer: OKI
Model: 421n
Packaged Quantity: 1
Product Line: OKI Microline
Bay Provided
Type: None
Document & Media Handling
Max Media Size: continuous paper 4 in - 16 in (width)
Media Size Class: Other
Environmental Parameters
Humidity Range Operating: 20 - 80%
Max Operating Temperature: 96.8 °F
Min Operating Temperature: 41 °F
Sound Emission (Idle): 52 dBA
Sound Emission (Operating): 56 dBA
Max Printing Speed B/W: 570 char/sec
Max Resolution B/W: 240 x 216 dpi
MTBF: 20,000 hour(s)
Type: None
Connectivity Technology: Wired
Data Link Protocol: Ethernet , Fast Ethernet
Form Factor: Internal
Type: Print server
Office Machine
Functions: Printer
Monthly Duty Cycle (max): 17000 pages
Printing Output Type: Monochrome
Printing Technology: Dot-matrix
Type: Printer
PC Connectivity
PC Connection: LAN , Parallel , USB
Power Device
Form Factor: Internal
Type: Power supply
Printer Fonts
Font Included Type: Barcode
Fonts Included Qty: 8
Font Included Type: Scalable
Printer Media
Max Media Weight: 90 g/m2
Media Feeder Capacity: 1 sheet
Media Feeder Qty: 1
Media Load Type: Manual
Min Media Weight: 52.6 g/m2
Media Feeder Max Format: continuous paper 4 in - 16 in (width)
Min Media Weight: 45 g/m2
Type: None
Type: None
Slot Required
Type: None
Type: Drivers & Utilities
System Requirements
Min Operating System: Microsoft DOS , Microsoft Windows 2000 / XP , Microsoft Windows 3.x/95/98 , Microsoft Windows NT 4.0
Dimensions & Weight
Depth: 13.6 in
Height: 6 in
Weight: 21.16 lbs
Width: 21.7 in
Installed Size: 128 KB
Barcodes: Code 128 , Code 39 , EAN/JAN-13 , EAN/JAN-8 , Interleaved 2 of 5 , Postnet , UPC-A , UPC-E
Environmental Standards
ENERGY STAR Qualified: Yes
Expansion Slots
Type: Expansion slot



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  • What is Tray Capacity? Tray Capacity or Paper Capacity is the maximum number of pages that can be stored in the printer before you have to refill it.

  • What is RAM? RAM or Buffer Memory holds the graphic information on the printer while the file is on its way to be printed. The larger the RAM, the faster the printer can print complex graphics.

  • After installing a printer, go to the Windows dialog box and check the settings, so you won't be surprised by what happens the first time you print.

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