Zebra GK420T Thermal Transfer Printer

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SKU: THPR-4000 Categories: ,
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Zebra Thermal Transfer Desktop printer

Model # GK 420T

Standard Features – Specifications Subject to change without notice

Programming language: EPL and ZPL are standard

construction: Dual-wall frame

Tool-less printhead and platen replacement

OpenACCESS for easy media loading

Quick and easy ribbon loading

Auto-calibration of media

Triple connectivity: USB, parallel, serial

Printer Specifications


203 dpi/8dots per mm;

300 dpi/12 dots per mm (GX430t model)


Standard: 4 MB Flash; 8 MB SDRAM

Optional: 64 MB (68 MB total) Flash with RTC (GX


Print width

4.09″/104 mm

Maximum Print length

39.0″/990 mm

Maximum Print speed

GK420: 5″/127 mm per second

GX420: 6″/152 mm per second

GX430: 4″/102 mm per second

Media sensors

Standard: Fixed reflective and transmissive sensors

Optional: Adjustable reflective black line sensor

(GX models)

Media Characteristics

Maximum label and liner length

Maximum non-continuous: 39/990 mm

Maximum label and liner width

0.75/19 mm to 4.25/108 mm

Maximum media roll size

5/127 mm O.D.

Media thickness

0.003/0.08 mm to 0.0075/0.19 mm

Media types

Roll-fed or fan-fed, die-cut or continuous direct thermal

labels with or without black line, tag stock, continuous

receipt paper, wristbands

Ribbon Characteristics

Outside diameter

1.36/35 mm

Standard length

244/74 m


1:1 media to roll to ribbon


1.33/33.8 mm to 43/109.2 mm

Core inner diameter

0.5/12.7 mm

Additional information

Label Type