The Ricoh GEN4 MH2420 printhead is suitable for a range of aqueous, solvent and UV printers. This printhead has an integrated heater and thermistor. This is Ricoh original printhead and it is covered by a manufacturer warranty. This cable including the connector is 44 cm long. The version with short cable has been discontinued. The long cable version is used as an alternative. The printhead comes with hose barb ink inlet that can be removed in. case o-ring sealed ink inlet are required. This printhead corresponds to Ricoh part numbers N220792W, N220792S, 
Ricoh GEN5 Printhead-MH5421F
This MH5421F Ricoh printhead offers high-resolution printing and support for multiple ink colors with multi-row nozzles, as well as enhanced aqueous ink compatibility with new bonding technology. We recommend to change the head cables when installing a new printhead.
Ink recirculating structure
Highly stable jetting performance is achieved through the introduction of a new recirculating structure. This structure enables continuous ink flow resulting in reducing the risk of jetting failure caused by either clogged ink or entrapped air bubbles. Each printhead has enhanced bonding technology for improved durability. With these new features, the RICOH MH5421F and MH5421MF printheads offer enhanced compatibility with a wider range of fluids. These features result in:
- Increased reliability for single-pass printing by delivering improved print quality and productivity
- Increased reliability for systems with rapid setting ink, such as pigment ink, white or metallic materials
- Increased reliability for systems with fast drying ink
- The removal of air bubbles in the ink chamber to achieve self-recovery from jetting failure
- *Single-pass system : the printhead carriage remains in a fixed position and completes image printing in a single pass while the print material is conveyed underneath.
Support for gray-scale
Achieves excellent gray-scale rendering at up to 4 levels.
Excellent durability and extended service life
Ricoh inkjet print heads are made of stainless steel. These heads are highly robust and offer excellent anti-corrosion properties for multiple inks, resulting in excellent durability and extended service life.
Variable drop volume capability
The multi-drop capability allows the creation of a range of drop sizes enabling gray-scale printing.
Product Specifications:
- Max. number of color inks: 2 colors
- Print width: 54.1mm
- Compatible ink: aquaeous ink
- Nozzle spacing: 1/150″ (0.1693mm)
- Head materials: SST, Nickel alloy and Epoxy Adhesive
- Nozzle plate surface: Coated SST
- Number of nozzles: 4 x 320 nozzles (1280)
- Nozzle spacing: 0.1693 mm
- Temperature control: Integrated Heater and Thermistor
- Operator temperature range: Up to 50° C
- Drop volume: 7/14/21 pl (depending on the ink)
- Jetting frequency: 30 kHZ
- Viscosity range: 11mPa . s
- Gray-scale: 4 levels (depending on the ink characteristics)
- Total length: 248mm (cable length: 179mm)
- Dimensions: 89 x 25 x 69 mm (excluding cables)
- Weight: 155g
This printhead carries a manufacturer warranty. Country of origin : Japan
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