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OKI MICROLINE 320 Turbo Impact Dot Matrix Printer with RS-232C, 435 cps Mono, 240 x 216 dpi Resolution, Parallel, USB, Serial - 91907101

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Product Overview

Tank Tough® reliability and expanded head gap for dedicated forms printing

The MICROLINE® 320/321 Turbo builds on the heritage of Tank-Tough® reliability established by OKI's ML320/321, our best-selling dot matrix printer all around the world.

This 9-pin dot matrix printer is blazing new trails in productivity. Engineered for dedicated printing in the most demanding point-of-sale, automation and utility applications, the ML320/321 Turbo can easily run twice as long as most printers in its class! It can simplify any job on virtually any stock, and it's economical enough to put wherever you need data on the spot.

The ML320/321 Turbo puts the "work" in workstations for financial departments, wholesale or retail sales counters, even for warehouse or manufacturing environments.

Set it up with a box of forms — even 6-part invoices! — and let it run and run and run.

 Sony a580 Its relentless performance comes from the rugged printhead design that keeps your print images sharp for a 200-million character life. A lighter, stronger, more efficient motor reduces friction, heat build-up and wear. The long-lasting rack and pinion drive system ensures print quality longer than belt or cable systems. Plus, an impact-resistant chassis protects the entire mechanism, even in the harshest environments. When it comes to endurance, dependability and efficiency, the ML320/321 Turbo sets a new standard.

Unmatched paper-handling capability

 Sony a580 Specifically designed to offer enhanced paper-handling capabilities, the ML320/321 Turbo can be set with an expanded gap between printhead and platen, accommodating multi-part forms and stock that are up to twice as thick as those that fit our nearest competitor. A bottom feed feature* keeps the paper path short and straight when running stiff card stock or labels. The ML320/321 Turbo printhead has a lightweight samarium cobalt magnet and powerful, spring-activated pins to deliver a stronger punch — right to the last page of a 6-part form!

The ML320/321 Turbo. A lot of tank-tough performance for dedicated forms printing.

 Sony a580 For precisely formed output, a patented optical sensor accurately positions the printhead on the page, first time and every time. And the auto-tear feature accurately positions continuous forms for a clean tear at the perforation — eliminating wasted forms. This reliable, flexible 9-pin dot matrix printer can meet your needs today and in the future, because it's the perfect replacement for the ML320/321. It's exactly the same size, built to stand up to harsh factory conditions, and is compatible with virtually all custom and "off-the-shelf" software.


Manufacturer Okidata
Mfg Part# 91907101
SKU 10343218
UPC 051851440538
UPC 14 00051851440538
Tech Specs
Technology, Speed and Print Characteristics
Print Method: 9-pin (.34 mm diameter) Serial Impact Dot Matrix
Print Speed (cps) 1:
NLQ Utility HS Draft SS Draft
75 300 390 435
Graphics Resolution:
288(H) x 144(V) dpi max. OKI® MICROLINE®;
240(H) x 216(V) dpi max. Epson®/IBM®
Feed Rate: 5.0 ips
Emulations, Interface and Memory
Emulation: Epson FX, IBM PPR III, (DEC®) ANSI x 3.64 2 and OKI MICROLINE
Interface: Standard: IEEE Parallel; USB; Optional: RS-232C Serial; Ethernet via OkiLAN 6120e 10/100 Base-T Internal Print Server standard on ML320T/n and ML321T/n 3, OkiLAN® 6020e+ 10/100 Base-T External Print Server; Co-ax Adapter or Twin-ax/-Co-ax (3rd party)
Memory: Total RAM: 64K Receive Buffer: 28K
Operating Systems: Windows® Vista™, XP, 2000, 98,
3.x and NT® 4.0; MS-DOS®; Novell® – NDS®, NDPS, NLSP; IPX/SPX protocol; UNIX; HP® JetAdmin®, Web JetAdmin® compatible; PrintSuperVision utility.
Code Pages: Standard ASCII; Epson Character Set I & II; IBM Character Set I, I & All; Code Page 850, 860, 863, 865, 437; BRASCII and ABICOMP
Scalable: Courier, Gothic (22 – 216 pt. in 1-pt. increments)
Bar Codes: Code 39, UPC A, UPC E, EAN 8, EAN 13,
Interleaved 2 of 5, Code 128 (A, B, C), PostNet®
Paper Handling
Paper Input: Single/Multi-part, Continuous forms, Cut sheet, Envelopes, Card stock, Labels
Number of Copies: 6
Thickness: Rear Feed: 0.014" (0.36 mm) max.
Bottom Feed: 0.017" (0.43 mm) max.4,
Expandable to 0.031"
Paper Feeding: Top/Rear/Bottom
Standard Tractor: Rear Push with zero-tear and paper park
Options: Top-Mount Pull Tractor, Bottom Push Tractor,
Roll Paper Stand (ML320T only)
Size (WxDxH):
ML320T: 15.7" x 13.6" x 4.6" (39.9 cm x 35.5 cm x 11.7 cm)
ML321T: 21.7" x 13.6" x 4.6" (55.0 cm x 35.5 cm x 11.7 cm)
Net Weight:
ML320T – 14.3 lb. (6.5 kg); ML321T – 18.7 lb. (8.5 kg)
Power Consumption: 100W (max.) operating
Electrical: 120V, 230V
Operating Temperature: 41°F to 104°F (5°C to 40°C);
20% to 80% relative humidity
Noise: Quiet mode – 52 dBA
Warranty and Reliability
Limited Warranty: 1-Year parts, labor and printhead
MTBF: 10,000 hours (25% duty cycle, 35% page density)
Monthly Workload:
ML320T: 20,000 pages at 25% duty cycle/35% density
ML321T: 13,000 pages at 25% duty cycle/35% density
Printhead Life: 200 million characters at 25% duty cycle
Ribbon Life: 3 million characters

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