BOCI BLT422 Consumables: The Current BLT4 Entry Head
BLT422 is the current BLT4 entry model — and it is not in the consumable tables yet
BOCI's BLT4 product page now lists the series as BLT422 / 442 / 462 / 482 / 4102 / 4122: the 422 sits where the 421 family used to. That matters because a machine sold in 2026 may well carry a 422 nameplate even when the buyer expects a 421.
The second part is less convenient. BOCI's own consumable tables, read on 2026-11-09, do not contain the string “BLT422” at all. The ceramic-ring, sensor-module and focus-module rows still list 420 / 421 / 421S / 441 / 442 / 461 / 462 and so on. There is therefore no official line saying which part a 422 takes — anyone who quotes you a 422 part number without a photo is guessing, or is quoting the 421S row and hoping it holds.
What can be stated as fact
| Item | Position | Basis |
|---|---|---|
| Model position | Current entry model of the BLT4 series; first in BOCI's BLT4 model row | Official product page |
| Lineage | 421 → 421S → 422, a replacement in the same slot | Model row plus dealer notice, cross-read |
| Ceramic ring family | M11×0.75 is the 4-series ring; 422 is expected to stay in it | Official table, at family level |
| Per-model sizes | Not published — measure the old part | Absence of a 422 row |
We would rather publish the gap than invent a table. It is also the practical argument: on a head this new, a photo and a caliper beat a catalogue lookup that does not exist yet.
How to order for a BLT422
- Photograph the nameplate. A 422 label settles the model; a 421S label belongs on the BLT421 / BLT421S guide instead.
- Photograph the old ceramic ring next to a rule, and check the nozzle thread against a known M11 nut.
- Measure the protective window (outer diameter × thickness) with it out of the drawer.
- We reply with ring thread, nozzle thread and window size in one message, then quote.
Where BLT422 orders go wrong
- Assuming “421S parts fit 422”. They may on some revisions, but nothing is published — confirmation beats assumption.
- Ordering by series name. “BLT4 ceramic ring” spans M11, M11-P and M8; the -P and T variants are physically different rings, not relabelled ones.
- Replacing the ring for a height fault that is the cable. Same symptom, different cause: if there was no crash, check the sensing cable first.
FAQ
Is BLT422 a new head or a renamed BLT421S?
Both descriptions circulate. What is verifiable: the BLT4 model row now starts at BLT422, 421S no longer appears in it, and 422 has not yet entered the consumable tables. Treat it as the current entry head and confirm parts against the machine.
Do you publish BLT422 power, aperture or focal lengths?
No, because BOCI has not published them for this model. Power is read from the nameplate and focal length from the lens marking, and we confirm both in the reply rather than print a number we cannot source.
Sources
BOCI consumable tables (bochu.com/pro_en/consumable) and BLT4 model row (fscut.com), both read 2026-11-09. Part numbers deliberately not reproduced.
Related categories
Ruiying is an independent supplier of aftermarket laser consumables. Brand names are used only to indicate compatibility and remain the property of their respective owners. We are not affiliated with, authorised by, or endorsed by these manufacturers. Specifications vary between head revisions — please confirm the full model before ordering.