Oki B721dn / B731dn Series


OKi B721 / B731 Printershown fully configured
OKi B721 / B731 Printershown fully configured

Looking for Oki B721dn / B731dn Parts?

Print cartridge (18,000 pages) (B721/B731)
45488801 45488803

Print cartridge (25,000 pages) (B721/B731)

Print cartridge (36,000 pages) (B731)
45439001 45439003

200K Fuser Maintenance kit

2nd/3rd/4th paper tray

Large Capacity Feeder

Caster base

Hard Disk Drive 160GB

Memory 512MB

QQC 1724 LG Printer Stand
1724LG KE1691-30 (New)

TCP Converter 2 - Includes Power Supply

B721/731 Series 2 Year Onsite (WEP) Virtual

B721/731 Series 3 Year Onsite (WEP) Virtual

B721/731 Series 4 Year Onsite (WEP) Virtual

B721/731 Series 5 Year Onsite (WEP) Virtual

Keeping up with your needs- and environmental concerns.

The B721dn and B731dn printers from OKI are designed to enhance productivity in demanding environments. These digital monochrome printers can deliver powerful, cost-effective performance, providing crisp, clear documents with high speed and low levels of user intervention. They're a powerful, reliable solution for your workgroup printing needs.

Feature-rich and up to any task - Perfect for high-volume applications, both printers have high monthly duty cycles. If your business requires lengthy proposals, reports, memos, spreadsheets, schedules, you name it- day after day after day- these are the printers for the job.

They're not just reliable, they're also fast: the B731dn prints at up to 55 ppm and the B721dn at up to 49 ppm, with the first page appearing in as little as 5 seconds.1 Users will spend less time waiting for their documents- which print at a crisp and clear 1200 x 1200 dpi resolution. With standard duplex printing you can double your efficiency (and save resources) by printing on both sides of the sheet. And with the straight through paper path, you can manually feed sheets of up to 140 lb. (253 gsm) index bristol or up to 80 #10 envelopes from the standard paper tray.

LCD display and alphanumeric keypad - These printers are extremely user friendly. A 5-line, blue backlit graphical display and alphanumeric keypad make menu settings and navigation a snap. Messages on the display are easy to read. Administrators can use the printer's keypad to control user access, and end users can enter PIN numbers to release secure print jobs.

Print from a USB Flash drive - Simply insert a USB memory stick into the USB port conveniently located on the side of the printer. Print select file formats without the need for a PC. Just follow the directions on the LCD display, and you're on your way in seconds.

At home in your environment - B721dn and B731dn printers are compatible with current Windows and Mac operating systems, and all are equipped with high-speed USB and 1 Gigabit Ethernet connectivity, so that everyone can take advantage of the productivity and cost savings.

1 Published performance results based on laboratory testing of print speed on letter-size sheets. Individual results may vary.
2 Memory DIMM sold separately.
3 B731dn only. Both models available with 18,000-page and 25,000-page toner cartridges. Declared yield in accordance with ISO/IEC 19752.
4 Available in the U.S. and Canada only.

The B721dn and B731dn fit the way you work- today and, through an array of performance enhancing options and upgrades, they can adapt to match your future printing needs.

Both models come with 256 MB of memory and 630-sheet paper capacity. You can increase memory to 768 MB1 for processing large files and add a 160 GB hard disk drive for file storage.

You can boost the paper capacity to a maximum of 3,160 sheets. Options include up to three additional 530-sheet paper trays or a 2,000- sheet Large Capacity Feeder.

Also for fewer interventions, both models are available with 18,000-page and high-capacity 25,000-page one-piece printer cartridges- and the B731dn is available with an extra-high capacity 36,000-page printer cartridge, as well.2

These printers can also help control your impact on the environment - B721dn and B731dn printers offer a number of environmentally friendly features, including:

  • ENERGY STAR compliance - With their lower power consumption, these printers meet the government's standards for energy efficiency.
  • Duplex (2-sided) printing - This technology allows for savings in energy and resources, in addition to using less media.
  • One-piece consumables - Long-lasting, user-replaceable printer cartridges remain friendly to your budget while lowering the number of items to dispose of or store.
  • Low power consumption - These finely engineered printers perform with low power requirements during regular operation, especially in Deep sleep mode.

Backed by legendary service and support - OKI is so confident in the performance of the B721dn and B731dn printers that they come with a 1-Year On-Site warranty that can be increased up to 5 years with options.3 And, for live technical support 24/7/365, you can call, toll-free, 800.OKI.DATA (800.654.3282) and speak to an expert located in North America.3

The B721dn and B731dn printers from OKI: full-featured and energy-efficient monochrome printers that can enhance the performance of your demanding small- to mid-size workgroups.

1 Memory DIMM sold separately.
2 Declared yield in accordance with ISO/IEC 19752.
3 Available in the U.S. and Canada only.
4 Published performance results based on laboratory testing of simplex (1-sided) print speed. Individual results may vary.



  • Simplex Print Speed: B721dn - up to 49 ppm; B731dn - up to 55 ppm 1
  • Duplex Print Speed: B721dn - up to 40 ipm; B731dn - up to 42 ipm 1
  • Time to First Page: As fast as 5 seconds1
  • Processor: 800 MHz CPU
  • Print Resolution: 1200 x 1200 dpi
  • Monthly Duty Cycle: B721dn - up to 250,000 pg.; B731dn - up to 280,000 pg.
  • Recommended Monthly Print Volume: B721dn - 3,000 - 20,000 pg.; B731dn - 5,000 - 30,000 pg.


  • Emulations: PCL 5e, PCL 6; PostScript 3 -; PDF v1.8; XPS; IBM ProPrinter; Epson FX
  • Operating Systems: Microsoft Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Server 2008 R2, Server 2008, Server 2003; Mac OS X 10.4 to 10.8


  • Interfaces: Standard - High-Speed USB, USB Host, 1 Gigabit Ethernet (10/100/1000 Base-TX); models with Wireless or Parallel interface available by special order

Operator Panel

  • Operator Panel: Alphanumeric keypad; 5-line, blue back-lit graphical display


  • Standard RAM: 256 MB
  • Max RAM: 768 MB2
  • Memory Storage: Optional 160 GB Hard Disk Drive

Paper Handling

  • Duplex: Standard
  • Standard Paper Capacity: 630 sheets (530-sheet Main Tray + 100-sheet Multi-purpose Tray)
  • Additional Paper Capacity: Optional 530-sheet 2nd, 3rd and 4th Trays; 2,000-sheet Large

Capacity Feeder

  • Maximum Paper Capacity: 3,160 sheets (standard 630-sheet input + 530-sheet 2nd Tray + 2,000-sheet Large Capacity Feeder)
  • Paper Types: Letter, Legal 13/13.5/14, Executive, A4, A5, B5; Com 10 envelopes
  • Paper Size: 3" x 5" min. to 8.5" x 14" and banners up to 52" long
  • Auto Size Detect: Trays 1, 2, 3, 4 - Letter/Legal/Executive/A4/A5/B5/COM 10
  • Standard Paper Output: 500 sheets face-down; 100 sheets face-up
  • Paper Weight: 17 lb. bond - 140 lb. index bristol (64 - 253 gsm)

Resident Fonts

  • Scalable Fonts: 90 PCL fonts; 136 PostScript fonts.
  • Barcodes: UPC-A, UPC-E, EAN/JAN-8, EAN/JAN-13, Interleaved 2of5, Code39, Code128, EAN/UCC-128, CODABAR, ZIP+4 POSTNET, PDF417, 2D QR Barcode


  • Size (WxDxH): 17.1" x 19.6" x 16.1" (435 mm x 498 mm x 410 mm)
  • Weight: 59.5 lb (27 Kg)
  • Power Consumption: Deep sleep - 1.5W (3.9W with installed options); Power-Save - 17W; Standby - 95W; Average - 800W (49 ppm), 850W (55 ppm); Peak - 1,400W
  • ENERGY STAR Compliance: Yes
  • ENERGY STAR TEC Value: 4.04 kWh/w (49 ppm); 5.0 kWh/w (55 ppm)
  • Acoustic Noise: Operating: B731dn - 57dBA or less; B721dn - 55dBA or less; Quiet mode - 53dBA or less; Standby - 30dBA or less Supplies
  • Print Cartridges: Standard - 18,000 pages; High-Capacity - 25,000 pages; Extra-High Capacity (B731dn only)-36,000 pages3 Warranty
  • Printer: 1-Year limited On-Site warranty4
  • LED Printhead: 5-Year limited warranty

1 Published performance results based on laboratory testing of print speed on letter-size sheets. Individual results may vary.
2 Memory DIMM sold separately.
3 Declared yield in accordance with ISO/IEC 19752. Both models ship with 10,000-page "starter" toner cartridge.
4 Available in the U.S. and Canada only.

print speed mono:5547
duty cycle:280000250000
resolution:1200 x 12001200 x 1200
interfaces:High-Speed USB, USB Host, 1GB Ethernet (10/100/1000 Base-TX)High-Speed USB, USB Host, 1GB Ethernet (10/100/1000 Base-TX)
paper capacity:630 sheets (530 main tray; 100 MPT)630 sheets (530 main tray; 100 MPT)
paper size:Letter, Legal, Executive, A4, A5, B5; Com 10 EnvelopesLetter, Legal, Executive, A4, A5, B5; Com 10 Envelopes
size:17.1" x 19.6" x 16.1" (435 mm x 498 mm x 410 mm)17.1" x 19.6" x 16.1" (435 mm x 498 mm x 410 mm)
weight:59.5 lb. (27 kg.)59.5 lb. (27 kg.)