Kyocera KJ4B-QA (MS Version) Original Water-Based Inkjet Printhead 600 DPI for MS JP4 / JP7 Series
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$2,577.00
Original Kyocera KJ4B-QA MS-specific aqueous piezo inkjet printhead configured for MS Italy printers. Features native 600 × 600 dpi resolution, 2,656 nozzles across a 108.25 mm effective print width, variable drop volumes of 5–18 pL, maximum drive frequency of 30 kHz and print speeds up to 75 m/min. Supplied as the MS hardware variant (typically with MS head cable) for compatibility with MS JP4 / JP4EVO, JP6, JP7 and related systems.
The Kyocera KJ4B-QA (MS Version) is an original genuine industrial piezo inkjet printhead from the KJ4B series, specifically configured for MS Italy printer platforms. It is engineered for high-speed printing with water-based (aqueous) inks and is intended for use on MS JP4 / JP4EVO, JP6, JP7 series machines as well as selected related systems such as MCS Eagle. This MS hardware variant differs from the Standard and EFI/Reggiani versions in electrical interface and cable configuration; the variants are not interchangeable.
The printhead delivers native 600 × 600 dpi resolution across an effective print width of 108.25 mm. It utilises 2,656 nozzles (approximately 2,558 active within the effective print area) arranged at a nozzle pitch of 0.042 mm. Maximum drive frequency is 30 kHz, supporting a maximum print speed of 75 m/min. Drop volumes are selectable at 5 pL, 7 pL, 12 pL and 18 pL (18 pL limited to lower drive frequencies). Recommended ink viscosity range is 5.0–6.0 mPa·s. Typical physical dimensions are 200 × 25 × 59.3 mm (W × D × H) with a dry weight of approximately 420 g. The head incorporates internal filters and an integrated reservoir heater with thermistor. No nozzle recirculation is included.
Critical Variant Warning
Three primary hardware variants of the KJ4B-QA exist: Standard, MS, and EFI/Reggiani. This listing is for the MS-specific version only. Installing a non-MS variant on an MS printer (or vice versa) will result in incompatibility. Always confirm the exact variant required by your machine (including serial number if possible) before ordering. The MS version is commonly supplied with the matching MS head cable; replacement of the associated flexible cables is strongly recommended when installing a new printhead.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Kyocera |
| Model / Variant | KJ4B-QA (MS Version) |
| Technology | Piezoelectric |
| Ink Type | Aqueous / Water-based |
| Native Resolution | 600 × 600 dpi |
| Total Nozzles | 2,656 |
| Active Nozzles (approx.) | 2,558 |
| Nozzle Pitch | 0.042 mm |
| Effective Print Width | 108.25 mm |
| Maximum Drive Frequency | 30 kHz |
| Maximum Print Speed | 75 m/min |
| Drop Volume | 5 / 7 / 12 / 18 pL (18 pL limited to lower frequencies) |
| Recommended Ink Viscosity | 5.0–6.0 mPa·s |
| Temperature Control | Integrated reservoir heater + thermistor |
| Internal Filters | Yes |
| Nozzle Recirculation | No |
| Dimensions (W × D × H) | 200 × 25 × 59.3 mm |
| Dry Weight | Approx. 420 g |
| Country of Origin | Japan |
Confirmed Compatibility (MS Version)
- MS Italy JP4 / JP4EVO
- MS Italy JP6
- MS Italy JP7
- MCS Eagle
- Selected related systems (e.g., certain Xerox Rialto 900 configurations) – always verify exact machine and serial number
Full system-level compatibility (head interface board, waveform, drive voltage, cables, firmware and ink delivery system) must still be confirmed with the printer manufacturer or qualified technician prior to installation.
Operational Recommendations
- Always handle the printhead while wearing a grounded anti-static ESD wrist strap.
- Power down the complete system before connecting or disconnecting any flexible cables.
- Thoroughly flush the ink channels with an approved cleaning solution before first use or after prolonged storage.
- Use only aqueous inks within the recommended viscosity range of 5.0–6.0 mPa·s.
- Use the correct MS-specific head cable supplied or recommended for this variant.
Warranty
Store Warranty: 30 Business Days After Delivery. Eligible claims for damage on arrival, defective product, non-functioning product, incorrect item or missing components require: (1) a continuous uninterrupted unboxing video, (2) clear evidence of the shipping package and shipping label, (3) clear evidence of the product condition, and (4) for functionality claims, a video showing initial installation and operation performed by a qualified technician. All claims remain subject to verification. When approved, a 100% money-back refund without deduction is provided. Manufacturer Warranty: Not publicly specified by Kyocera in available documentation. Warranty expressly excludes defects related to the use of non-original inks, clogged/missing/deviated nozzles, misuse, abuse, neglect, improper storage, lack of prescribed maintenance, operation for unintended purposes, third-party applications/software/parts/components or bulk ink systems, and purely cosmetic issues.
This is a genuine original Kyocera OEM printhead in the MS-specific hardware configuration. Proper variant selection, system integration, approved aqueous inks and correct handling procedures are essential for optimal performance and service life.
KJ4B-QA (MS Version)
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