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.
 
The following items are expressly excluded from warranty coverage:
defects related, in any way, to the use of non-original inks
clogged, missing or deviated nozzles
defects related to misuse, abuse, accident, neglect, lack of use, or improper storage when not in use for extended periods
defects related to failure to perform periodic maintenance as specified in the user documentation; operation for unintended purposes
defects related to improper loading of media
all other defects, failures or damage not considered manufacturing defects
defects related to third-party applications, software, parts, components, or peripheral devices, including any bulk ink system.
defects that are merely cosmetic in nature

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