Ricoh MH5420 / MH5440, commonly called Ricoh Gen5, is a stainless-steel industrial inkjet printhead for compatible UV, solvent and aqueous printer systems.
MH5420 is the two-color model and MH5440 is the four-color model. Confirm which model your printer requires before ordering.
| Official model | RICOH MH5420 / MH5440 |
| Common market name | Ricoh Gen5 |
| Method | Piston pusher with metallic diaphragm plate |
| Print width | 54.1 mm / 2.1 inches |
| Number of nozzles | 1,280 (4 x 320 channels), staggered |
| Nozzle spacing | 1/150 inch / 0.1693 mm for 4-color printing |
| Row distance | 0.55 mm; upper/lower swath distance 11.81 mm |
| Compatible ink | UV, Solvent, Aqueous, Others |
| Dimensions | 89(W) x 69(D) x 24.51(H) mm, excluding cables and connectors |
| Weight | 155 g |
| Max color inks | MH5420: 2 colors; MH5440: 4 colors |
| Operating temperature | Up to 60 C |
| Temperature control | Integrated heater and thermistor |
| Jetting frequency | Binary: 30 kHz; grey-scale: 20 kHz |
| Drop volume | Binary: 7 pl; grey-scale: 7-35 pl, depending on ink |
| Viscosity range | 10-12 mPa.s |
| Surface tension | 28-35 mN/m |
| Grey-scale | 4 levels |
| Ink ports | MH5420: 2 x dual ports; MH5440: 4 x dual ports |
| Source note | Ricoh official MH5420 / MH5440 specification page |
Ricoh lists MH5420 / MH5440 as compatible with UV, solvent, aqueous and other ink systems. Final use depends on printer waveform, ink supply, temperature and manufacturer configuration.
Used in compatible UV flatbed, UV roll-to-roll, hybrid UV, solvent signage, label, packaging and industrial printing systems.
Send the old printhead label, printer model, current ink type, cable photos and nozzle test before purchase. Do not replace Gen5 with Gen6 or Gen5i unless your printer supplier confirms the conversion.
Printheads are precision components. Use trained technicians, antistatic handling, correct cables, clean ink path, matched waveform, stable negative pressure and proper maintenance procedure. Do not touch the nozzle plate or electrical contacts.
Can I choose by the name Gen5, Gen6 or Gen5i only? No. Always confirm the exact Ricoh model code on the old printhead label, such as MH5420, MH5440, MH5320, MH5340, TH5241, MH2420 or GH2220.
Can one Ricoh printhead replace another Ricoh model? Not automatically. Cable, board, firmware, waveform, ink path, ink port and printer settings may differ.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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