OKI ML420 Prospecto

Printed in the USA. MS11326/0404pdf

Field-proven reliability

is just one reason OKI

®

MICROLINE

®

impact printers

are the most widely-used in North America.

1

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.

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

2

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.

• Printhead: 9-Pin SIDM
• Graphics Resolution: 240 (H) x 216 (V) dpi maximum
• Feed Rate: 4.5 ips (11.4 cm/sec.) 
• Print Speed and Character Matrix:

Mode

NLQ

Utility

HSD

SSD

(10 cpi)

(10 cpi)

(10 cpi)

(12 cpi) 

Speed (in cps)

95

380

510

570

• Emulation: Epson

®

FX, IBM

®

ProPrinter

®

, OKI MICROLINE

• Interface: Standard – IEEE Parallel and USB;   

Optional – RS-232C Serial and Ethernet

®

via OkiLAN

®

6120 i

10/100 Base-T Internal Print Server (no AC power adapter
required); Twin-ax/Co-ax (Also available through 3rd Party)

• Memory: 128K

• Operating Systems: Windows

®

XP, 2000, 98/95,

3.x and NT

®

4.0; MS-DOS

®

• 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 

• Limited Warranty: 3-Year parts and labor, 2-Year printhead 
• MTBF: 20,000 hours (25% duty cycle / 35% page density)
• Reliability:

ML420 – 24,000 pg./mo. duty cycle 
ML421 – 17,000 pg./mo. duty cycle

• Printhead Life: 200 million characters
• Ribbon Life: 7.5 million characters

• Size (WxDxH):

ML420 – 15.7" x 13.6" x 6.0" (39.8 cm x 34.5 cm x 15.2 cm); 
ML421 – 21.7" x 13.6" x 6.0" (55.1 cm x 34.5 cm x 15.2 cm)

• Net Weight:

ML420 – 16.4 lb. (7.43 kg);   ML421 – 21.2 lb. (9.6 kg)

• Acoustic Noise: 56 dBA
• Power Requirements: 120V Model: 120 VAC +6%, -15%;

230V Model: 230 VAC +15%, -14%

on OKI Impact Printers and sup-

plies, including OKIcare

®

Extended Service Programs:

1-800-OKI-DATA (800-654-3282).

1 

Q4 2003 IDC Quarterly Tracker and Evans Research.

2

3-year standard warranty parts and labor/2-year printhead.

3

Available in the U.S. and Canada only.

All specifications subject to change without notice.

© 2004 Oki Data Americas, Inc. OKI Reg. T.M., M.D., M.R., MICROLINE,
OkiLAN, OKIcare Reg. T.M., Oki Electric Industry Co., Ltd. 7-Day/24-Hour
logo T.M., Oki Data Americas, Inc. Epson Reg. T.M., Seiko Epson Corp. IBM,
ProPrinter Reg. T.M., International Business Machines, Inc. Windows,
Windows NT, MS-DOS Reg. T.M., Microsoft Corp. Ethernet Reg. T.M., SCO.
Energy Star Reg. T.M., U.S. EPA. USB-Logo T.M. Universal Serial Bus
Implementers Forum, Inc.

®

®

9-Pin Impact Printers

MICROLINE 420/Parallel/120V

62418701

MICROLINE 420/Parallel/120V/Black

91909701

MICROLINE 420/Parallel/230V

62418702

MICROLINE 421/Parallel/120V

62418801

MICROLINE 421/Parallel/230V

62418802

Top-Mount Pull Tractor Kit with acoustic cover:

ML420

70030501

ML421

70030601

Bottom Push Tractor Kit:

ML420

70030701

ML421

70030801

Cut Sheet Feeder  

70030101

Roll Paper Stand (ML420 only)

70023301

RS-232C Serial Interface (19.2K baud max.)

70012801

OkiLAN

®

6120 i 10/100 Base-T Ethernet 

Internal Print Server

70046501

OkiLAN

®

6020e 10/100 Base-T Ethernet 

External Print Server

70036001

OkiLAN 6010e 10 Base-T Ethernet 

External Print Server

70034401

Self-inking Ribbon Cartridge

42377801

Co-ax Adapter

70047201

Twin-ax/Co-ax (Also available through Third Party.
Call 1-800-OKI-DATA.)

OKI ML400 Series 1-Yr. Warranty Ext. 58264901

58263111

OKI ML400 Series 2-Yr. Warranty Ext. 58264902

58263112

OKI ML400 Series 1-Yr. Warranty Ext. 58264701

58265511

OKI ML400 Series 2-Yr. Warranty Ext. 58264702

58265512

Upgrade to 3-Yr. Overnight Exchange

58264801

58264811

To contact Oki Data Americas, Inc.
In USA: 2000 Bishops Gate Blvd.
Mount Laurel, NJ 08054-4620
Tel: 800.OKI.DATA (800.654.3282)
Fax: 856.222.5320

In Canada: 2735 Matheson Blvd. East
Mississauga, Ontario L4W 4M8
Tel: 905.238.4250
Fax: 905.238.4421

In Latin America and Mexico: 
2000 Bishops Gate Blvd.
Mount Laurel, NJ 08054-4620
Tel: 856.231.0002
Fax: 856.222.5071