}Kyocera KJ4A-AA Printhead
Brand: Kyocera
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Availability: In stock
The Kyocera KJ4A-AA is a genuine original single-colour UV inkjet printhead engineered for high-precision label, packaging, sign graphics, and offset surprint applications. With 2,656 nozzles (2,558 active) across a 108.25mm print width at 600 dpi native resolution, drop volumes variable from 3 to 17 pl across 20 grayscale levels, and a maximum drive frequency of 20 kHz delivering up to 50 m/min — it is Kyocera's highest-quality fine-drop UV head for demanding single-colour and multi-head printing configurations. Integrated internal filters eliminate foreign objects from the ink path; the built-in internal heater compensates for ambient temperature effects on UV ink viscosity (optimum 6.0–7.0 mPa·s). Head cable replacement is recommended at installation. Also sold under the updated designation KJ4A-AL — same head, same specs. Every KJ4A-AA we sell at Digiprint USA is 100% genuine original Kyocera.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | Kyocera KJ4A-AA (also designated KJ4A-AL) |
| Configuration | Single colour — 1 ink channel |
| Ink type | UV-curable and high-viscosity inks only |
| Total nozzles | 2,656 total (2,558 active) |
| Standard resolution | 600 × 600 dpi |
| Effective print width | 108.25 mm |
| Max. drive frequency | 20 kHz |
| Max. print speed | 50 m/min (50.8 m/min nominal) |
| Minimum drop volume | 3 pl |
| Maximum drop volume | 17 pl |
| Grayscale levels | 20 levels |
| Typical ink viscosity | 6.0 – 7.0 mPa·s |
| Internal heater | Yes — compensates for ambient temperature effects on UV ink viscosity |
| Internal filters | Yes — eliminates foreign objects from ink supply |
| Recirculation | No |
| Dimensions (W × D × H) | 200 × 25 × 57.9 mm |
| Dry weight | 420 g |
| Head cable | Replacement recommended at installation |
| Country of origin | Japan |
| Condition | 100% genuine original Kyocera, brand new |
KJ4A UV Series — Single vs Dual Colour
| Model | Channels | Max Speed | Best For |
|---|---|---|---|
| KJ4A-AA (this listing) | Single colour | 50 m/min | Multi-head UV systems, label, packaging, sign graphics, offset surprint |
| KJ4A-TA | Dual colour (2×1,328) | 158 m/min | High-speed single-pass UV — two colours per head |
Compatible Printers
Contact our team with your printer make, model, and ink type to confirm KJ4A-AA compatibility before ordering.
Warranty Notice
Due to the sensitive nature of industrial printhead components, we cannot accept returns, exchanges, or refunds once the printhead has been installed. All sales are final. Replace head cables at installation. Contact our team to confirm UV ink compatibility before ordering.
Why Buy from Digiprint USA
• 100% genuine original Kyocera KJ4A-AA (KJ4A-AL) — manufactured in Japan
• KJ4A-AL naming update noted — same head, we ship whichever current designation Kyocera ships
• Full spec coverage — 3–17pl variable, 20 grayscale levels, 2558 active nozzles, 6.0–7.0 mPa·s UV viscosity, no recirculation — most complete KJ4A-AA listing available
• KJ4A-AA vs KJ4A-TA distinction — single vs dual colour UV, we confirm which your printer uses before you order
• KJ4A UV vs KJ4B aqueous distinction — we prevent wrong series ordering for your ink type
• In stock in Doral, Miami FL — same day shipping before 2PM EST
• Ideal for Latin American Dilli NEO SUN and UV production shops using Miami freight forwarders
• Free technical support — we confirm KJ4A-AA vs KJ4A-TA and UV ink compatibility before you order
View our full range of genuine Kyocera printheads, including the KJ4B-QA Standard for aqueous applications.
Frequently Asked Questions
What is the difference between KJ4A-AA and KJ4B — and why does it matter for my ink type?
The KJ4A series (AA, TA) is Kyocera's UV and high-viscosity ink platform — designed for UV-curable inks at 6.0–7.0 mPa·s viscosity. The KJ4B series (QA, 0300, YH) is Kyocera's aqueous water-based ink platform — designed for water-based inks at 5.0–6.0 mPa·s viscosity. The two series have different internal ink path materials, heater configurations, and seal designs to handle their respective ink chemistries. Installing a KJ4A head in an aqueous system, or a KJ4B head in a UV system, will result in incompatibility, seal degradation, and head failure. Always confirm your printer's ink type before ordering.
What does "20 grayscale levels" mean for the KJ4A-AA?
The KJ4A-AA produces variable drop sizes from 3 to 17 pl — and supports 20 distinct grayscale levels within that range. Each nozzle can fire drops at 20 different size steps between 3 and 17 pl on a firing-by-firing basis, enabling very fine tonal control for smooth gradations, precise colour density, and accurate ink volume management. This is significantly more grayscale depth than many UV heads offer, contributing to the KJ4A-AA's print quality advantage in fine-detail label, packaging, and sign graphics applications.
Is the KJ4A-AA the same as the KJ4A-AL?
Yes — the KJ4A-AL is the updated designation for the same printhead previously sold as KJ4A-AA. Kyocera updated the model naming as part of a product line revision, but the core specifications — 2,656 nozzles, 600 dpi, 3–17 pl, 20 kHz, 50 m/min, UV/high-viscosity ink — remain identical. Some suppliers and printer manufacturers still list the head under the original KJ4A-AA designation. At Digiprint USA we ship whichever current designation Kyocera ships in the genuine OEM packaging.
Do you ship the Kyocera KJ4A-AA to Latin America?
Yes — same day shipping from our Doral, Miami FL warehouse before 2PM EST. Our Miami location is ideal for Latin American Dilli NEO SUN and UV industrial production shops using freight forwarders in the Doral area.
