The OKI Microline 421 9-pin, wide-carriage printer is engineered for dedicated forms printing in the most demanding point-of-sale, automation and utility environments. ML421 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. TIts print speed and versatile paper handling make it ideal for the office, too. The ML421 sports features that give it a strong edge over their predecessors as well as the competition. Three 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. 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, card stock, labels and envelopes as well without jams or smears. The OKI ML421 delivers the kind of productivity usually reserved for printers much higher in 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. The patented OKI closed-loop feedback system assures character placement accuracy.
Features
Print Head: 9 Pin (200-million character printhead life)
Resolution: 240 dpi x 216 dpi
Memory: 128 KB
Carriage Type: Wide
Print Speed: Up to 570 cps
Paper Loading: Rear Push and Friction Feed
Connectivity: USB & Parallel
Environments: PC Compatible
Warranty: 3 Year Limited covering parts and labor
Options
Oki MICROLINE 421 Dot Matrix Printer: Supplies and Accessories Options
Oki MICROLINE 421 Dot Matrix Printer Specifications
Part # 62418801
Key Specifications
Oki Microline 421
Manufacturer
Oki
Manufacturer Part #
62418801
Device Type
Impact Dot Matrix Printer
Printhead
9 pin
Print Speed
High Speed Draft
570 CPS - fast draft - 12 CPI 510 CPS fast draft 10 CPI
Utility Speed
380 CPS draft 10 CPI
Near Letter Quality Speed
95 CPS - letter - 10 CPI
Resolution
240 dpi x 216 dpi
Connectivity
Ports
Parallel and USB
Optional Network Ports
70034401 OkiLAN 6010e 10 Base-T External Print Server 70036001 OkiLAN 6020e External Print Server 70046501 OkiLAN 6120i 10/100 Base-T Ethernet Internal Printer Server
Other Options
70012801 Super Speed RS-232C 70043301 TROY EtherWind™ 802.11b Wireless Print Server
Emulations
Epson FX, IBM ProPrinter, OKI MICROLINE
Memory
128 kb
Paper Handling
Input
Rear Push and Friction Feed
Input Options
Bottom Push Tractor, Top Pull Tractor, Cut Sheet Feeder, Roll Paper Stand
Number of Copies
6
Thickness
0.017" (0.43 mm) maximum
Paper Size
Envelopes, labels, plain paper, continuous forms, cards up to 16"
Other Options
70030101 Single Bin Cut Sheet Feeder 3000T
MTBF
20,000 hours (25% duty cycle/35% page density)
Misc. Features
Power Requirements
120 VAC +6%, -15%
Noise Levels
56 dBA
Supplies
Ribbon
42377801 ML400 Series Self-inking Ribbon Cartridge (4 million character life)
Other Supplies
59348502 Guide 70000803 Bi-directional cable (Parallel only) 70034401 OkiLAN 6010e 10 Base-T External Print Server 70036001 OkiLAN 6020e External Print Server 70046501 OkiLAN 6120i 10/100 Base-T Ethernet Internal Printer Server 70012801 Super Speed RS-232C 70043301 TROY EtherWind™ 802.11b Wireless Print Server
Dimensions (H X W X D)
Unit
6.0" x 13.6" x 21.7"
Weight
Unit
21.2 lb (9.6 kg)
As Shipped
24 lb
System Requirements
PC
Windows XP, 2000, 98/95, 3.x and NT 4.0, MS-DOS
Warranty
Three Year Warranty Covers Parts and Labor on Unit Two Year Warranty on Print head
Includes in the Box
Oki Microline 421 Dot Matrix Printer Users Manual CD ROM: Drivers and Utilities Cable Not Included
Oki MICROLINE 421 Dot Matrix Printer Features
Performance is Built In The ML 421 sports features that give it a strong edge over its 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 ML 421 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 ML 421 delivers 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 assures character placement accuracy
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.
Durability The performance-optimized power supply of the ML 421 has been enlarged to easily handle harsh printing conditions. 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 ML 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 Reliability Oki has a reputation for quality and reliability no competing printer can claim. The ML 421 is backed with 3 years of warranty coverage and a network of authorized Oki Dealer Service Centers and Service Depots.
Oki MICROLINE 421 Dot Matrix Printer Included Items
Okidata Microline 421 Dot Matrix Printer
Users Manual
CD ROM: Drivers and Utilities
Cable Not Included
Oki MICROLINE 421 Dot Matrix Printer Warranty Information
Warranty Length: Manufacturer Three Year Limited Warranty
Details: Three Years covering parts and labor, Two Years covering print head. This warranty does not cover consumables.
1.800.814.5410 
858.764.8900 Mon-Fri 6AM-4PM PT
