OKI Microline 3320eco A4 Mono Dot Matrix Printer


Key Features
Back Key Features
  • USB & Parallel
  • 240 x 216 dpi Print
  • Epson FX, IBM ProPrinter, Microline
  • Top-feed: semi-automatic feeding of single sheets or cut sheetfeeder for letterhead
  • 128Kb RAM
  • Parts: 5 (original + 4 copies)
  • Rear-feed: for extra flexibility: paper park feature for easy switching between continuous forms and single sheets
  • width: 80 characters (10cpi), 160 characters (compressed mode)
  • 387cps Draft
  • 435cps Fast Draft
  • 73cps Best
Compare the Range
Compare the Range
ModelMemory Price ex Vat 
OKI Microline 3320eco128KbView£298.15
Special Offer
  • Free 3 Year On-Site Warranty
  • Free 8GB Memory Stick

Business Price £298.15 ex VAT @ 20%
£357.78 inc VAT
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OKI Microline 3320eco
Business Price £298.15 ex VAT @ 20%
£357.78 inc VAT
  • Product Overview
  • Cartridges & Accessories
  • Questions & Answers (4)
  • Reviews (4)
Product Overview

OKI Microline 3320eco in More Detail

The OKI ML3320eco mono dot matrix printer is suited to high speed, high volume data and word processing applications, where fast throughput and flexible paper management are required.

Robust and reliable

These 9-pin, impact printers are engineered to be tough enough for dedicated printing in the most demanding environments. With outstanding reliability, ease-of-use and barcoding facilities as well as the ability to run twice as long as most printers in their class, they are ideal for customer service points in wholesale and service environments.

The ML3320eco can accommodate multipart forms and stock that are up to twice as thick as those that fit the nearest competitor.

A high performance machine

Their relentless performance comes from OKI’s unique, high durability printhead design; and a light, strong, efficient motor. The long-last rack-and-pinion drive system and a protective, impact-resistance chassis, make it resilient even in the toughest environments.

With a patented optical sensor that places the printhead for precise output, and the auto-tear feature that accurately positions your continuous forms for a clean tear, right at the perforation - eliminating wasted forms and facilitating your day-to-day forms printing.

Reducing your carbon footprint

The ML3320eco/ML3321eco have been developed to be eco-friendly. With power consumption at just 1.5W in sleep mode, your running costs and energy consumption are kept to a minimum, as well as reducing your carbon footprint.

Detailed Specification

Detailed Specification


Product Group Output A4
Printer Standard Resolution 240 x 216 dpi Print
Print Width width: 80 characters (10cpi), 160 characters (compressed mode)
Speed Draft 387cps Draft
Speed Fast Draft 435cps Fast Draft
Speed Near Letter Quality 73cps Best


Number of Copies Parts: 5 (original + 4 copies)


Interface Type(s) USB & Parallel
Parallel Ports Centronics parallel interface Parallel Port

System Specification

Memory (Maximum) 128Kb RAM

Media Handling

Paper Handling Input 2 Top-feed: semi-automatic feeding of single sheets or cut sheetfeeder for letterhead
Paper Handling Input 3 Rear-feed: for extra flexibility: paper park feature for easy switching between continuous forms and single sheets
Envelope Size 165 x 92mm
Media Supported Light card stock: max. 163 g/m2 (via bottomfeed)
Paper Handling Features Pull tractor, Single bin cut-sheet feeder, Dual bin cut-sheet feeder (ML3320eco only), Roll paper stand (ML3320eco only), Bottom push tractor
Paper Size Continuous forms: 76 - 254 mm
Paper Weight 38 to 90g/Sq m

Barcodes & Labels

Barcode 5031713050360
Built in Bar Codes Code 39, UPC-A, UPC-E, EAN 8, EAN 13, Interleaved 2 of 5, ZIP, Code 128


Mono or Colour Printer Mono
Technology Dot Matrix Printer
Case Colour Classic Grey
Dimensions 39.8cm (W) x 34.5cm (D) x 11.6cm (H) - Weight 5.8kg
Noise Level 57dbA
Product Summary OKI Microline 3320eco A4 Mono Dot Matrix Printer
Product Type Dot Matrix Printer
Voltage/ Power/ Frequency 220 to 240VAC / 50 to 60Hz
Carton Dimensions 55cm (W) x 25.5cm (D) x 50.5cm (H) - Weight 7.2kg

Consumable Info

Print Head Life 200,000,000 Characters
Ribbon Life 3,000,000 Characters


Emulations Epson FX, IBM ProPrinter, Microline
Font Capabilities HSD, Utility, NLQ-Courier (Scalable), NLQ-Gothic (Scalable), Barcodes, OCR-B


Warranty 3 year On-Site Warranty (when product is registered within 30 days of purchase).

More Features

Character Pitch 10/12/15/17.1/20 pitch and proportional
MTBF 10,000 Hours

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Questions & Answers

Customer Questions & Answers

Can't find the answer you're looking for? Our printer experts are here to help! Ask a Question
  • can this be connected to a network?

    Yes, the OKI Microline 3320eco can be connected to a network using a OKI LAN7130E Network Card.

    On 14/11/2016 11:36:56
  • We have 2 x of the Oki 3320's. We need another dot matrix but need it to take the wider A3 type paper. Do Oki make an equivalent version?

    The OKI Microline 3320eco (01308203) does not print on A3 paper. The OKI Microline 3321eco (01308303) however does print on A3 paper as this is a wide carriage model which takes similar sized paper to A3 (136 column width)

    On 11/10/2016 14:44:51
  • We have an Oki Microline 3320 eco but we now want to put it on our network. Do Oki make an accessory so you can put it on a network?

    Oki do currently offer an accessory for the OKI Microline 3320eco (01308203) to put a printer on the network, it is the OKI OKILAN7130E Network Card

    On 06/10/2016 14:19:48
  • Will this dot matrix print on 10cm wide paper?

    The OKI Microline 3320eco (01308203) can print on paper with a width of 10cm.

    On 04/10/2016 10:39:01
Customer Reviews

Overall Customer Rating

3.6 / 5
Already own this? Tell us what you think... Review This Product
  • r perrin 08 July 2015 4.5 / 5 Value 4 Features 5 Quality 4 Performance 5 oki cutting corners on instructions

    life would be so much easier if you provided a proper operators manual and not that useless cd.Trying to set up printer was impossible using cd. otherwise the printer does what it says and is easy to operate.the set up diagrams are good except the release tabs on the tractor feeds are not shown.overall though pleased with product and printerland.

  • Philip Proctor 01 July 2015 4.25 / 5 Value 4 Features 5 Quality 4 Performance 4 Good speed

    Great printer for invoice orders and dispatch notes, good instructions in the manual and easy to install.

  • Donno 01 August 2013 5 / 5 Value 5 Features 5 Quality 5 Performance 5 Does exactly what it says on the tin

    This is a perfect little dot matrix printer for my company. We replaced another old OKI Microline machine with this and haven't been disappointed. Printerland service as good as ever.

  • DAVID DURNALL 30 July 2013 1 / 5 Value 1 Features 1 Quality 1 Performance 1 VERY DISAPOINTING

    On speaking to the sales team at OKI this was the machine to have. We have had this machine now for 12 months and it has never been used. Unless you can actually programme computer systems to adapt to your documents you have not got a chance of setting this printer to work. We have been back to OKI and forwarded them our documents with no luck. We have had an outside IT guy to see if he could help with no luck. It seems OKI are quick enough to take your money and run.

All print speeds, running cost calculations and consumable life cycles are MANUFACTURER ESTIMATES based on 5% per page coverage. Images are used for illustration purposes only

Running Costs

-All consumable life cycles are manufacturer estimates based on 5% coverage per A4 page

*Estimation based on toner/ink cartridges only and excludes long life components such as image drums and fusers.

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