OKI Microline 5591eco A4 Mono Dot Matrix Printer


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5 / 5 (1  reviews)

"OKI ML5591

These OKI Dot Matrix printers are real work-horses. Great for high volume printing. This new 'eco' model replace..."

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Key Features
Back Key Features
  • USB, Parallel
  • 360 x 360 dpi Print
  • Epson LQ, Esc/P2, IBM ProPrinter X24/XL24
  • Paper parking, Low tear off, Push tractors, Autoload single sheet
  • Parts: 5 (original + 4 copies)
  • width: 136 characters (10cpi), 272 characters (compressed mode)
  • 420cps Draft
  • 473cps Fast Draft
  • 315cps Best
Compare the Range
Compare the Range
ModelDouble Sided PrintingNetwork ReadyUSB Port Price ex Vat 
OKI Microline 5591eco---View£373.33
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  • Free 3 Year On-Site Warranty
  • Free 8GB Memory Stick

Business Price £373.33 ex VAT @ 20%
£448.00 inc VAT
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  • Overview
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OKI Microline 5591eco
Business Price £373.33 ex VAT @ 20%
£448.00 inc VAT
  • Product Overview
  • Cartridges & Accessories
  • Questions & Answers (4)
  • Reviews (1)
Product Overview

OKI Microline 5591eco in More Detail

The OKI Microline 5591eco has been designed for use in the harshest of operating environments whilst offering the highest levels of flexibility and performance with unparalleled reliability.

The ML5591eco mono dot matrix printer features advanced specifications that ensure excellent productivity and reliability every time.

Their robustness and flexibility make them the ideal choice for demanding environments. The 24-pin print head also provides a better print quality than 9-pincounter-parts for the printing of invoices, purchase orders, spreadsheets and more.

High performance

With a powerful 24-pin printhead and easily changeable ribbons which can produce up to 4 million characters, this machine always delivers sharp, detailed text.

The ML5591eco is able to provide speedy outputs with fast print speeds of up to 473 characters per second which is ideal for many industrial businesses or commercial settings.

The addition of IBM and Epson emulations allows the printer to produce a range of documents including invoices, receipts, picking lists, spreadsheets and reports.

Flexible and Versatile

The easy-to-use and flexible design allows the machine to manage continuous feed paper, cut sheers and multi-part forms up to 5 documents simultaneously.

With both a USB and parallel interface, and a vast range of scalable fonts and barcode support, this machine will have everything you need, when you need it.

What's in the Box?

What's in the Box?

  • ML5591 24-Pin Dot Matrix Printer
  • AC Cable (UK)
  • CD (including Drivers and User Manuals)
  • Setup Guide
  • Consumable Ribbon
Detailed Specification

Detailed Specification


Product Group Output A4
Printer Standard Resolution 360 x 360 dpi Print
Print Width width: 136 characters (10cpi), 272 characters (compressed mode)
Speed Draft 420cps Draft
Speed Fast Draft 473cps Fast Draft
Speed Near Letter Quality 315cps Best


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


Interface Type(s) USB, Parallel
Parallel Ports 1 x Parallel Port Parallel Port
USB Ports 1 x USB

Media Handling

Paper Handling Input 1 Paper parking, Low tear off, Push tractors, Autoload single sheet
Envelope Size 105 x 241mm
Paper Handling Features Push-tractor rear-feed, Paper park feature, Easy tear-off without paper waste, Semi-automatic feeding of single sheets
Paper Size 76 to 406mm wide
Paper Weight 34 to 90g/Sq m

Barcodes & Labels

Barcode 5031713050575
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
Dimensions 55.2cm (W) x 34.5cm (D) x 15.3cm (H) - Weight 9.6kg
Noise Level 55dbA
Product Summary OKI Microline 5591 A4 Mono Dot Matrix Printer
Product Type Dot Matrix Printer
Voltage/ Power/ Frequency 230VAC / 50 to 60Hz

Consumable Info

Print Head Life 200,000,000 Characters
Ribbon Life 4,000,000 Characters


Emulations Epson LQ, Esc/P2, IBM ProPrinter X24/XL24
Font Capabilities Courier(Scalable),Roman(Scalable), Swiss(Scalable), Prestige, Gothic, Utility, Swiss Bold, Orator, OCR-A, OCR-B + Barcodes

In the Box

In The Box ML5591 24-Pin Dot Matrix Printer, AC Cable (UK), CD (including Drivers and User Manuals), Setup Guide, Consumable Ribbon


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

More Features

Character Pitch 10, 12, 15, 17.1, 20cpi
Input Buffer 128KB
MTBF 20,000 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
  • will the Oki ML 5591 take A3 continuous feed paper?

    The OKI ML5591 will accept continuous paper between the following sizes: Width 76.2-406.4mm x Length 76.2-355.6mm

    On 10/05/2017 15:57:10
  • I'm looking at the 5591eco but needed to know if this will support wide carriage printing? I know the 5590eco does narrow carriage.

    Yes, the 5591eco is the wide carriage version providing 136 columns (272 columns in compressed mode)

    On 22/12/2016 10:57:34
  • What is the difference between a 9 and 24 pin printer?

    The difference is in the number of pins in the printhead that strike the page in order to print your document. The more pins there are, the faster and better quality your document will be.

    On 26/10/2016 13:49:10
  • Can the Oki ML5591 dot matrix printer be used to print on normal paper i.e. not the continuous feed paper?

    You can purchase an accessory called a 'Single Bin Cut Sheet Feeder' part no. 44497502 which enables you to print on regular paper.

    On 03/10/2016 12:06:18
Customer Reviews

Overall Customer Rating

5 / 5
Already own this? Tell us what you think... Review This Product
  • Roy Wheatley 16 September 2015 5 / 5 Value 5 Features 5 Quality 5 Performance 5 OKI ML5591

    These OKI Dot Matrix printers are real work-horses. Great for high volume printing. This new 'eco' model replaces the same 'non-eco' model that was so old it became part of the furniture, but the print-head started to show signs of wear. Would recommend this printer to anyone who needs up to 4 part carbon copies.

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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