}Kyocera KJ4B-QA Water Printhead — Standard Version
Brand: Kyocera
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Availability: In stock
The Kyocera KJ4B-QA is a genuine original high-speed aqueous inkjet printhead engineered for single-pass direct-to-textile and industrial water-based printing. With 2,656 nozzles across a 108.25mm print swathe at 600 dpi native resolution, variable drop volumes from 5 to 18 pl, and a maximum drive frequency of 30 kHz enabling print speeds up to 75 m/min, it delivers 30,000 drops per second per head. This listing is the Standard version — suitable for Xerox Rialto, Atexco Vega series, and other compatible systems. Every KJ4B-QA (Standard) we sell at Digiprint USA is 100% genuine original Kyocera.
Standard version — NOT compatible with MS Italy or EFI Reggiani printers. The KJ4B-QA exists in two hardware variants that are not interchangeable: the Standard (this listing) for Xerox Rialto, Atexco, and other manufacturers; and the MS/EFI Reggiani version for MS Italy and EFI Reggiani printers specifically. Always confirm your printer manufacturer and model before ordering — the two variants cannot be used interchangeably. Contact our team if unsure.
Technical Specifications
| Specification | Detail |
|---|---|
| Model | Kyocera KJ4B-QA — Standard version |
| Ink type | Water-based (aqueous) |
| Total nozzles | 2,656 (single colour) |
| Nozzle pitch | 0.042 mm |
| Standard resolution | 600 × 600 dpi |
| Effective print width | 108.25 mm |
| Max. drive frequency | 30 kHz |
| Max. print speed | 75 m/min (at 600 dpi) |
| Drop output | 30,000 drops/second |
| Drop volumes | 5 / 7 / 12 / 18 pl (variable) — 18pl up to 20 kHz only |
| Typical ink viscosity | 5.0 – 6.0 mPa·s |
| Temperature control | Integrated reservoir heater and thermistor |
| Internal filters | Yes — eliminates foreign objects in ink supply |
| Ink supply | Unique ink channel design for stable supply |
| Input voltage | 3.3 V (logic) / 26 V (driving) |
| Dimensions (W × D × H) | 200 × 25 × 59.3 mm |
| Dry weight | 420 g |
| Condition | 100% genuine original Kyocera, brand new |
KJ4B Family — Which Kyocera Water Printhead Do You Need?
| Model | Resolution | Max Speed | Notes |
|---|---|---|---|
| KJ4B-QA Standard (this listing) | 600 dpi | 75 m/min | Standard — NOT for MS/EFI Reggiani |
| KJ4B-YH | 600 dpi | 100 m/min | High-speed variant — 40 kHz |
| KJ4B-0300 | 300 dpi | 120+ m/min | Dual-colour (2 × 1,328 nozzles) — for MS Italy printers |
| KJ4C-0360 | 360 dpi | 50 m/min | Ink circulation system — UV/AQ/Oil |
Compatible Printers (Standard Version)
The KJ4B-QA Standard is confirmed compatible with the following printers:
Contact our team with your printer make and model to confirm KJ4B-QA Standard 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. Contact our team to confirm Standard vs MS/EFI Reggiani variant before ordering.
Why Buy from Digiprint USA
• 100% genuine original Kyocera KJ4B-QA Standard — not compatible, not refurbished
• Standard vs MS/EFI Reggiani variant confirmed before every order — prevents the most common KJ4B-QA ordering mistake
• Full spec coverage — 2,656 nozzles, 5–18pl variable drop, internal filters, reservoir heater/thermistor, 30,000 drops/second — most detailed KJ4B-QA listing in the market
• KJ4B family comparison (QA vs YH vs 0300 vs KJ4C) — we help identify the correct model for your printer before you order
• In stock in Doral, Miami FL — same day shipping before 2PM EST
• Ideal for Latin American Xerox Rialto and Atexco Vega shops using Miami freight forwarders
• Free technical support — we confirm Standard vs MS variant and printer compatibility before you order
View our full range of genuine Kyocera printheads.
Frequently Asked Questions
What is the difference between the KJ4B-QA Standard and the MS/EFI Reggiani version?
Both are the same KJ4B-QA Kyocera printhead technology — 2,656 nozzles, 600 dpi, 5–18pl, 30 kHz, 108.25mm print width. The difference is hardware-level compatibility with the ink system and drive electronics of specific printer manufacturers. The Standard version is engineered for Xerox Rialto, Atexco Vega, and other compatible systems. The MS/EFI Reggiani version is hardware-configured for MS Italy and EFI Reggiani printers. Installing the wrong version in a printer results in jetting failure and may damage the head drive circuitry. Always confirm your printer manufacturer before ordering.
What does the 18 pl drop volume limitation at 20 kHz mean?
The KJ4B-QA supports four variable drop volumes: 5, 7, 12, and 18 pl. The three smaller drop sizes (5, 7, 12 pl) are available at the full 30 kHz drive frequency, supporting maximum print speeds up to 75 m/min. The 18 pl drop size is limited to a maximum of 20 kHz drive frequency — this is a physical constraint of the piezo actuation at that drop volume. For most textile and industrial applications, 5 and 7 pl are used for fine detail, while 12 and 18 pl are used for high-coverage flood fill areas at reduced frequency.
What does the internal filter and reservoir heater do?
The KJ4B-QA has two built-in protective systems that distinguish it from lower-grade industrial printheads. The internal filters intercept particulate matter and foreign objects before they reach the nozzle plate — a critical feature for water-based inks which can carry pigment agglomerates. The integrated reservoir heater and thermistor maintain the ink at a consistent operating temperature regardless of ambient conditions, ensuring stable viscosity (5.0–6.0 mPa·s) and consistent drop formation throughout long production runs.
Do you ship the Kyocera KJ4B-QA Standard to Latin America?
Yes — same day shipping from our Doral, Miami FL warehouse before 2PM EST. Our Miami location is ideal for Latin American Xerox Rialto and Atexco Vega production shops using freight forwarders in the Doral area.
