2-inch (up to 60mm) open frame kiosk printing mechanism

The BX3-21 is a compact, highly flexible 2-inch (up to 60mm) open frame, Direct Thermal kiosk printing mechanism. Designed for standalone self-service kiosk installations, where space is limited the low profile mechanism with flexible mounting options is ideal for today’s latest generation of slimline kiosks.

This highly reliable printing mechanism operates at print speeds of up to 250mm per second with 203dpi resolution to product high quality text, graphics and barcodes. Presenting a larger paper roll capacity than traditional packaged kiosk printers, the BK3-21 support media roll diameters of up to 120mm and various media widths of 60 / 58 / 20mm for a range of printing applications from receipt and ticketing to narrow token printing. While supporting paper saving features to reduce paper consumption up to 25%, alongside decreased CO2 emissions.

Featuring a compact, lightweight design, the BK3-21 offers flexibility to kiosk builders by supporting a range of kiosk mounting options thanks to its intuitive power/reset buttons located on either side of the printer. Ideal for unmanned kiosks, the mechanism’s low maintenance, open frame design with easily adjustable paper guide and numerous customizable bezel options offer simple printer customization. While operating in temperatures between -20~60℃ (-4~140℉).

Providing multiple connectivity options including USB (V2.0 Full Speed) and Serial (9P-Male, 5P-Connector), the BK3-21 is also supported by BIXOLON’s wide range of drivers, utilities and SDKs. The BK3-21 is compatible with Windows® major OS system and OPOS-based systems from Android™, Windows® and Linux™ for smart based devices.


Ensuring Productivity and Reducing TCO

– Fast speed up to 250mm per second at 203dpi
– Long term dependable operation in a wide range of tempereture
– Supporting selectable media widths : 60 / 58 / 20 mm
– Diverse drivers and SDKs for major operating
systems including Android, Windows, and Linux
– Supporting Paper Saving Mode reducing paper usage up to 25%

Compact and User-Centered Design

– Large paper roll capacity
: Media roll diameter of 80 / 102 / 120 mm
– The compact and lightweight to
fit perfectly into compact kiosk spaces
– Power switch and reset button available on both
sides of the printer making it easy to reboot
– Smooth and seamless paper feeding with
additional roller-tension

Flexibility for Wide-Ranging Requirements

– Diverse interface offering a variety of ways to connect
USB(V2.0 Full Speed) + Serial(9P-Male, Connector type)
– Removable bezels to be tailored for different designs of kiosks
– Multi-position near end sensor for efficiently monitoring status of paper and media width frame adjustable by hand”


Print Characteristics
Print Method Direct Thermal
Print Speed Up to 250mm/s
Print Resolution 203dpi
Print Width "BK3-31: 72 / 54 / 48 / 12 mmBK3-21: 54 / 48 / 12 mm"
Sensor Paper End, Cover Open, Near End, Black Mark
Media Characteristics
Media Type Receipt
Media Width "BK3-31: 83 / 80 / 60 / 58 / 20 mmBK3-21: 60 / 58 / 20 mm"
Media Roll Diameter Up to 120 mm
Media Thickness 0.05 ~ 0.12 mm
Supply Method Easy Paper Loading
Physical Characteristics
"Dimensions(WxDxH)" "BK3-31: Media Roll Diameter Φ80: 130 x 130 x 91Media Roll Diameter Φ102: 130 x 147 x 99Media Roll Diameter Φ120: 130 x 143 x 105BK3-21: Media Roll Diameter Φ80: 109 x 130 x 91Media Roll Diameter Φ102: 109 x 137 x 99Media Roll Diameter Φ120: 109 x 144 x 105"
Weight "BK3-31: 700 gBK3-21: 600 g"
Electrical 100-240V AV, 50/60Hz
Lever Direction "BK3-31: Left / RightBK3-21: Right"
Mount Direction Horizontal / Vertical
Performance Characteristics
NV Image Memory 256 Kbytes (Mono)
Receive Buffer 64 Kbytes
User Define Buffer 12 Kbytes
Interface "Standard: USB (V2.0 Full Speed) + Serial Optional: USB (V2.0 Full Speed) + Serial + Ethernet (BK3-31 only)"
Connector Type DC-Jack or 2P Connector
"BK3-31: USB B or 4P ConnectorBK3-21: USB B(Default)"
9P Male or 5P Connector
Environment Characteristics
Temperature "Operating: -20~60℃ (-4~140℉) ※ Optimal printing performances and maximum reliability will be obtained between 0 and 40°CStorage: -20~60℃ (-4~140℉)"
Humidity "Operating: 10~95% (non-condensing)Storage: 10~95% (non-condensing) excluding paper"
Thermal Print Head (TPH) 100 km
Auto Cutter 1.5 Million Cuts
Emulation BXL / POS
Driver/Utility Windows Driver, OPOS Driver, Linux / Mac CUPS Driver, Utility Program
SDK/Plugin Android SDK, Windows SDK, Linux SDK
Character Size "Font A: 12×24 Font B: 9×17 Font C: 9×24KOR, CHN, JPN: 24x24"
Characters Per Line "Print width 72mm : Font A: 48 Font B, C: 64, KOR, CHN, JPN: 24 (BK3-31 only)Print width 54mm : Font A: 36 Font B, C: 48, KOR, CHN, JPN: 18Print width 48mm : Font A: 32 Font B, C: 42, KOR, CHN, JPN: 16Print width 12mm : Font A: 8 Font B, C: 10, KOR, CHN, JPN: 4"
Character Sets "Alphanumeric: 95Extended Graphics:128×35 pageInternational: 32"
Graphics Supporting user-defined fonts, graphics, formats and logos
Barcode Symbologies "1D: Coda Bar, Code 39, Code 93, Code 128, EAN-8, EAN-13, ITF, UPC-A, UPC-E 2D: Data Matrix, GS1-128, GS1 DataBar Stacked / Omnidirectional / Truncated / Limited / Expanded, PDF417, QR code"
Bezel Type "BK3-31: Non-Bezel / Standard-Bezel(4 types) / LED-Bezel(Green)BK3-21: Non-Bezel / Standard-Bezel(4 types)"
Bezel Media Width "BK3-31: 83 / 80 / 60 / 58 / 20 mmBK3-21: 60 / 58 / 20 mm"
Bezel Media Thickness 0.05 ~ 0.12 mm
"Presenter(BK3-31 only, LED-Bezel default)"
Paper Stock Direction Upper
Media Width 80 mm
Media Thickness 0.05 ~ 0.10 mm
Media Length 50 ~ 250 mm
Media Core Outer Diameter Φ31.4(Min)
Ejection Speed 250mm/s(Max)
Optional "SMPS (DC Jack)SMPS (2P Connector) Male to Male type Serial Cable5P to Male type Serial CableUSB A-B Cable 1.8mPower Cord"


Industry Transport and Logistics

Public Transporation


Patient Verification


Instore Operations


Food & Beverage

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