Raytools BM114 vs BM114S: D28-M11 or D32-M14
One letter, two different rings
Raytools numbers two heads that look alike and take different ceramics: the BM114 sits on the D28-M11 ring, the BM114S on the D32-M14. The S is not a revision suffix you can ignore — it moves the head into the larger ring family, and with it the nozzle body diameter.
Both independent parts tables we read agree on this split, and it is the single most expensive mistake on this model: a ring that is 4 mm larger in body diameter does not seat, and a nozzle ordered for the other body will not thread.
Which part follows which head
| Part | BM114 | BM114S | How to tell on the machine |
|---|---|---|---|
| Ceramic ring | D28-M11 (D28-H12-M11) | D32-M14 (D32-H12-M14) | Ring outer diameter: 28 mm vs 32 mm |
| Nozzle body / thread | D28 H15, M11 | D32 H15, M14 | Thread against a known M11 or M14 nut |
| Protective window | Same head family: measure the old window (D × T) rather than assume a size | Caliper on the old window | |
| Focus / collimating lens | D30 family; focal length is printed on the module | Marking on the old lens group | |
We do not print a window size for this head because the two window positions differ and the revision can move the number. The measurement is two minutes; the return is two weeks.
Why the S matters commercially
Distributors stock one ring for “BM114” and then discover that half their customers have the S. If you keep both, label the bins by ring diameter rather than by head name — the head name is what the customer says, the ring diameter is what the head needs.
How to confirm
- Read the full nameplate: BM114 or BM114S (and BM114E if present).
- Measure the ring across the body — 28 mm or 32 mm.
- Photograph the old nozzle beside a rule; the thread decides the rest.
- We reply with ring, nozzle thread and window size in one message.
Where BM114 orders go wrong
- Treating S as cosmetic. It is a different ring and a different nozzle body, not a marking change.
- Assuming the BM110 nozzles fit. BM110 is D32 M14 like the BM114S — so they interchange — but the plain BM114 is D28 M11 and does not.
- Ordering one window size for a whole batch. Check each head: a mixed fleet is normal.
FAQ
Can I use BM110 nozzles on a BM114?
On a BM114S yes (both D32 M14). On a plain BM114 no (D28 M11). Confirm the ring before you buy a box of ten.
Is BM114E the same as BM114S?
Both appear in parts tables on the D28-M11 side in some listings and on the D32-M14 side in others. Because the listings disagree, we treat the 114E as a nameplate-first head: send the photo and we confirm the ring rather than pick a side.
Sources
Raytools ceramic-ring tables (D28-H12-M11 → BT220 / BM114 / BM115 / BS06K; D32-H12-M14 → BT240 / BT240S / BM109 / BM110 / BM111 / BM114S) from two independent parts suppliers, read 2026-11-09.
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.