KJ4A-0300-Q06DS-HG1 - Kyocera Inkjet Printhead

Kyocera KJ4A-0300 printhead – UV flatbed printers – ref. KJ4A-0300-Q06DS-HG1

The Kyocera KJ4A-0300-Q06DS-HG1 printhead is an original equipment manufacturer (OEM) piezoelectric inkjet printhead fitted to UV flatbed and hybrid production printers. It is the component that deposits the ink onto the substrate: its precision directly determines the sharpness, density and uniformity of the print.

It features 2,656 nozzles spread across a width of 112.35 mm, offering a native resolution of 300 dpi and variable droplet size (greyscale mode: 4, 6, 10 and 14 pl). Its drive frequency reaches 30 kHz and its dual-colour (2-channel) design is optimised for UV-curable inks and other high-viscosity inks (optimal viscosity 7.0 to 7.5 mPa·s).

Supplied as an original Kyocera (OEM) printhead, sold individually and ready for installation. Kyocera offers the KJ4A-0300-Q06DS in several ink configurations, identified by a suffix (here -HG1): it is essential to order the exact variant corresponding to your machine’s configuration.

Technical specifications

• OEM part number: KJ4A-0300-Q06DS-HG1
• Manufacturer: Kyocera (Japan)
• Part type: Piezoelectric inkjet printhead (drop-on-demand)
• Ink compatibility: UV-curable / high-viscosity inks — dual-colour configuration (2 channels)
• Number of nozzles: 2,656 (1,328 × 2 rows)
• Native resolution: 300 dpi
• Print width: 112.35 mm
• Drop volume: variable 4 / 6 / 10 / 14 pl (grey scale)
• Drive frequency: up to 30 kHz
• Optimum ink viscosity: 7.0 to 7.5 mPa·s
• Dimensions / weight: 200 × 36 × 61.4 mm — approx. 540 g
• Supplied as: genuine Kyocera print head (OEM), sold individually

Compatibility and use

• UV flatbed and hybrid printers fitted with Kyocera KJ4A-0300 printheads
• Docan — UV flatbed series
• Handtop — UV printers
• Gongzheng (GZ)
• Flora
• Atexco
• Order the exact -HG1 variant corresponding to the machine’s ink configuration

Function

• Sprays UV ink droplets onto the substrate (image deposition)
• Adjusts droplet size (4 to 14 pl) to control resolution and density
• Ensures print rate and speed (up to 30 kHz, 2,656 nozzles) in multi-pass mode
• Produces two colours per printhead thanks to its dual-channel design
• Maintains jet straightness and alignment via Kyocera piezo mechanics

Possible symptoms of wear

• Clogged or missing nozzles → white streaks (banding) on the print
• Misaligned droplets → blurred outlines, poor dot placement
• Reduced density or uneven colours from one pass to the next
• Ink leakage or inability to prime (purge)
• Print head not recognised by the electronics or short circuit
• Dried-out nozzles following a prolonged period of inactivity (specific to UV inks)

Replacing the print head with a genuine Kyocera KJ4A-0300-Q06DS-HG1 restores precise droplet ejection and a uniform spray, which is essential for maintaining consistent print quality and avoiding production waste.

♻️ DG Spare Parts – European specialist in spare parts for large-format printers and plotters.