Raytools BM115 Cutting Head - Consumables for 6 kW to 12 kW Machines
The Raytools BM115 is a high-power auto-focusing fiber laser cutting head rated for 6 kW, 8 kW and 12 kW sources, with a 35 mm clear aperture, water-cooled collimation and focus assemblies, and air cooling to the nozzle. It achieves auto focus by moving the collimation lens group rather than the focusing lens. Its most important ordering fact: the BM115 uses the M11 ceramic nozzle holder and D28 M11 nozzles - not the D32 M14 set fitted to the BM109, BM110, BM111, BM114 and BM114S. It shares that M11 fitment with the BM114E, BM116 and BS12K. SparesZone stocks the M11 range in Ahmedabad with same-day dispatch.
The BM115 Breaks the Raytools Nozzle Pattern - Three Things to Know Before Ordering
Almost everything a workshop learns about Raytools consumables on a 3 kW machine is wrong for a BM115. These are the three differences that matter on a purchase order:
- Nozzles are D28 with M11 thread, not D32 M14. The BM115 carries the M11 ceramic nozzle holder, the same family used by the BM114E, BM116 and BS12K. A D32 M14 nozzle from your existing drawer will not seat, and forcing it risks the ceramic. If your plant runs a BM111 and a BM115 side by side, keep the two nozzle boxes physically apart and labelled.
- Auto focus works through the collimation lens, not the focusing lens. On the BM115 the collimation group moves, and a small collimator movement produces a much larger shift in focus position. That inverts the usual troubleshooting logic: a focus problem here points at the collimation drive, and it also means the focus mechanism is nowhere near the nozzle where the contamination is.
- The optics are high-power rated and water cooled. Both the collimation and focus assemblies are water cooled, and the head runs a 35 mm clear aperture to keep stray beam away from the walls. Economy-grade cover glass has no place in this head at 12 kW - the failure mode is not a poor cut, it is a destroyed lens group.
Send a photo of the head label and the drawers to +91 92740 95891. We confirm M11 fitment and identify each optic against your revision before quoting.
BM115 Spare Parts in India - Supporting Heads That Are Still Cutting Every Day
Raytools has moved its high-power range forward and the BM115 3.0 is listed by the manufacturer as out of production. That matters commercially and not at all practically: a very large number of 6 kW, 8 kW and 12 kW machines installed across India between roughly 2019 and 2023 carry this head, and they are cutting production work right now. Discontinued at the factory does not mean unsupported on the shop floor. SparesZone stocks the BM115 wear-part set - D28 M11 nozzles in both layer types, M11 ceramic nozzle holders, protective windows and the high-power lens group - specifically so that owners of these machines are not forced into a head replacement by a parts problem.
Why the M11 change happened, and why it is worth understanding. Raytools split its ceramic nozzle holder line into an M14 family for the BT240 and BM109 to BM114S heads, and an M11 family for the BM114E, BM115, BM116 and BS12K. The higher-power heads sit in the second group. For anyone maintaining a mixed fleet, the practical consequence is simple and unavoidable: a 12 kW machine and a 3 kW machine in the same shed do not share nozzles, however similar the parts look on a shelf. Label the boxes on day one.
Focus by collimation movement - what it means in practice. Because the BM115 shifts focus by moving the collimation lens group, a small mechanical movement translates into a much larger movement of the focal point, and the gearing depends on the optical configuration fitted. Two consequences follow. First, focus resolution is coarse compared with a head that moves the focusing lens directly, so focus settings deserve care. Second, when focus behaviour changes, look at the collimation drive and its reference position - not at anything in the nozzle end of the head.
Twelve kilowatts changes the maintenance economics completely. At 1.5 kW a neglected protective window costs a slow decline in cut quality. At 12 kW it can cost a lens group in a single shift. This is the power level at which fixed inspection intervals, logged replacement dates and clean purge air stop being good practice and start being the only way the machine stays profitable. The consumables are a rounding error against the hourly value of a 12 kW machine, and treating them as a cost centre is how workshops end up with unplanned week-long stoppages.
Air cooling to the nozzle is a feature you should not defeat. The BM115 delivers cooling air to the nozzle and ceramic area, which extends the life of both. If that air supply is contaminated with oil or moisture, it stops being protection and becomes a contamination path directly into the hottest part of the head. Filtration and dryer maintenance on this machine are optics maintenance, even though nobody files them that way.
Raytools BM115 - Specification and Consumable Implications
Confirm each line against your own head, since the BM115 shipped in more than one generation and in an EtherCAT variant as well:
| Specification | BM115 | What It Means for Spares |
|---|---|---|
| Power rating | 6 kW / 8 kW / 12 kW | High-power rated optics only - no economy substitutes |
| Nozzle fitment | D28 body, M11 thread | Does not interchange with BM109 to BM114S nozzles |
| Ceramic nozzle holder | M11 type | Shared with BM114E, BM116 and BS12K |
| Auto focus method | Movement of the collimation lens group | Focus faults sit in the collimation drive, not in consumables |
| Clear aperture | 35 mm | Reduces stray beam interference at high power |
| Collimation and focus cooling | Both water cooled | Chiller setpoint below dew point causes internal condensation |
| Nozzle cooling | Air cooled | Air quality directly affects nozzle and ceramic life |
| Protective windows | Collimator-side and focus-side cover glass | Sizes vary by generation - verify against your drawers |
| Lens group | High-power collimating and focusing assembly | Order by head model and marked focal length only |
| Control | Analog or EtherCAT variants depending on generation | No effect on wear parts; matters for drive faults |
Deliberate omission: we do not publish a single universal protective window size for the BM115, because this head ran across several generations and a confidently wrong dimension causes more damage than an honest gap. Photograph your drawers and we will identify each optic by measurement.
D28 M11 Nozzle Selection for 6-12 kW Cutting
High-power machines spend most of their time either cutting thin sheet very fast or cutting thick plate very deep, and those two jobs need different nozzles. Use this as a starting set:
| Job | Layer Type and Coating | Tip Size | Note for This Head |
|---|---|---|---|
| Thin sheet, maximum feed rate | Single layer, high-speed geometry | 1.2-2.0 mm | Standard bores lose jet coherence at 12 kW feed rates |
| Stainless 6-20 mm, nitrogen | Single layer, plain copper | 2.5-4.0 mm | Tip size and gas pressure rise together or the edge greys |
| Mild steel 6-16 mm, oxygen | Double layer, chrome-coated | 2.0-3.5 mm | Chrome resists the heaviest back-spatter environment |
| Mild steel 20-30 mm, oxygen | Double layer, chrome-coated | 4.0-5.0 mm | Long pierce cycles - schedule window inspection around them |
| Aluminium and copper alloys | Single layer | 2.0-3.0 mm | Reflective work - daily lower-window inspection is not optional |
Field note: the most damaging habit we see on 12 kW machines is running a nozzle a shift too long because the cut still looks acceptable. At this power the tip does not fail gracefully - it deforms, the gas cone loses shape, and spatter starts travelling upward while the visible edge is still passable. Change on inspection, not on complaint. Both layer types in D28 M11 are listed under standard nozzles, with thin-sheet geometries under high-speed nozzles.
Keeping a 12 kW Head Alive - The Four Things That Actually Matter
- Clean, dry air to the nozzle.
The BM115 cools the nozzle and ceramic with air. Oil carryover or moisture in that line does not just fail to protect - it delivers contamination straight into the hottest region of the head. Dryer and filter maintenance on this machine is optics maintenance. - Chiller setpoint above dew point.
With both collimation and focus assemblies water cooled, running the chiller too cold condenses moisture on optics inside a sealed head. In humid Indian conditions this shows as haze that appears overnight and clears by mid-morning. Raise the setpoint before condemning any glass. - Fixed inspection intervals, written down.
Lower protective window every shift, nozzle every 8-10 cutting hours, ceramic ring and collimator-side optics weekly. Record fitting dates. Within a month the log tells you your real consumption rate, and ordering stops being guesswork. - Never fit unrated cover glass.
At 12 kW a window with poor coating or a flaw absorbs enough energy to fail catastrophically and take the lens with it. This is the one head where we will refuse to supply a cheaper alternative. The optics range covers high-power windows and lens groups; the ceramic ring range covers the M11 holder this head requires.
BM115 Symptoms and Where to Look First
| Symptom | Most Likely Cause | First Check |
|---|---|---|
| Nozzle from stock will not thread in | A D32 M14 nozzle from a BM111 or BM114 has reached the wrong machine | Verify D28 M11 marking - stop before forcing anything |
| Height sensor alarm after a nozzle change | Nozzle not seated in the M11 ceramic holder, or spatter on the seat | Clean the seat, refit by hand, recalibrate |
| Focus behaviour changed after service | Collimation drive reference - this head focuses by collimator movement | Re-establish the collimation reference before touching optics |
| Optics hazy in the morning, clear by midday | Chiller running below dew point, condensation inside the head | Raise the coolant setpoint; do not replace glass yet |
| Nozzle and ceramic life suddenly halved | Cooling air contaminated with oil or moisture | Check dryer, filters and drain traps on the air line |
| Repeated protective window failure | Worn nozzle upstream throwing spatter, or a failed seal | Replace the nozzle and inspect seals before fitting more glass |
BM115 Versus the Rest of the Raytools Range
| Head | Power | Ceramic Holder | Nozzle |
|---|---|---|---|
| BM109 | Up to 1.5 kW | M14 | D32 M14 |
| BM110 / BM111 | Up to 3 kW | M14 | D32 M14 |
| BM114 / BM114S | 6 kW class | M14 | D32 M14 |
| BM114E | 6 kW class | M11 | D28 M11 |
| BM115 | 6 / 8 / 12 kW | M11 | D28 M11 |
Why High-Power Plants Source BM115 Parts from SparesZone
- The M11 range held as running stock.
D28 M11 nozzles in single and double layer, plain and chrome-coated, plus M11 ceramic nozzle holders - not ordered in on demand, held on the shelf in Ahmedabad. - Support for a head the factory has moved past.
The BM115 3.0 is listed as out of production, but the machines are still cutting. We keep them supplied rather than using a discontinuation notice as a reason to sell you a new head. - Optics we would fit ourselves, or none at all.
At 8 and 12 kW, unrated cover glass is a liability. We would rather lose the order than supply something that takes a lens group with it. - Fitment verified against your actual head.
Send a photo with the drawers open. We identify each optic by measurement instead of publishing one number that may not match your generation. - Same-day dispatch and GST invoicing.
Orders before 3 PM leave Ahmedabad the same day, reaching most of India in 1-3 business days. Dealer pricing from 50 pieces per SKU - WhatsApp +91 92740 95891.
Raytools BM115 - Frequently Asked Questions
A D28 body with M11 thread, matching the M11 ceramic nozzle holder the BM115 carries. This is the point where the BM115 differs from most of the Raytools range: the BM109, BM110, BM111, BM114, BM114S, BT240 and BT240S all use D32 with M14 thread, and those nozzles will not seat in a BM115. The M11 fitment is shared with the BM114E, BM116 and BS12K. In a mixed workshop, label the two nozzle boxes clearly - the parts are close enough in appearance to be confused during a shift change.
The BM115 series is specified for 6 kW, 8 kW and 12 kW fiber sources, with a 35 mm clear aperture to limit stray beam interference and water cooling on both the collimation and focus assemblies. Air cooling is delivered to the nozzle area to extend nozzle and ceramic life. At these power levels the consumables carry far more risk than on a 3 kW machine - a compromised protective window can take the lens group with it, so optic specification and inspection discipline matter more than the unit price of the glass.
Unlike most heads in the range, the BM115 achieves auto focus by moving the collimation lens group rather than the focusing lens. A small movement of the collimator produces a substantially larger shift in the focal point, with the exact ratio depending on the optical configuration fitted. Two practical consequences: focus resolution is coarser than a directly driven focusing lens, so focus settings need care; and any focus problem should be investigated at the collimation drive and its reference position, not at the nozzle end of the head.
Yes. Raytools lists the BM115 3.0 as out of production, but a large installed base of 6-12 kW machines in India still runs this head daily, and its consumables remain available. SparesZone holds D28 M11 nozzles in both layer types, M11 ceramic nozzle holders, protective windows and lens group components in Ahmedabad, with same-day dispatch on orders before 3 PM and delivery across India in 1-3 business days. A manufacturer discontinuation is a reason to plan buffer stock, not a reason to replace a working head.
No. Those heads use D32 nozzles with M14 thread and the BM115 uses D28 with M11. The body diameter and thread are both different, so the nozzle will not seat, and attempting to force it risks damaging the ceramic nozzle holder - a repair that costs many times the price of the correct nozzle. If your plant runs both generations, treat them as two separate stock lines from the first order, and keep the boxes physically separated on the shelf rather than relying on operators reading small markings mid-shift.
That pattern almost always points at coolant temperature rather than a faulty optic. Both the collimation and focus assemblies on the BM115 are water cooled, and if the chiller setpoint sits below the ambient dew point, moisture condenses on cold surfaces inside the head overnight and evaporates as the shop warms up. It is common in humid conditions along the Gujarat, Maharashtra and Tamil Nadu coasts. Raise the coolant setpoint above dew point and observe for a few days before replacing any glass.
Inspect the nozzle every 8-10 cutting hours and the lower protective window at least once per shift, replacing on inspection rather than waiting for cut quality to fall. At 12 kW a nozzle does not degrade gracefully - the tip deforms, the gas cone loses shape and spatter starts travelling upward while the visible edge still looks acceptable. Record fitting dates on every optic. Within a month your own log will give you a consumption rate far more accurate than any general guidance, including this page.
Yes. D28 M11 nozzles, M11 ceramic nozzle holders, protective windows and lens group components for the BM115 ship from our Ahmedabad stock to fabrication plants, OEM machine builders and dealers across India - including Pune, Chennai, Coimbatore, Ludhiana, Delhi NCR, Hyderabad, Rajkot and Surat. Every order carries a GST-compliant invoice, dispatch is same-day before 3 PM, and delivery is typically 1-3 business days. WhatsApp +91 92740 95891 with your head photo for fitment confirmation and pricing.
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Get BM115 Spares Pricing - M11 Fitment Confirmed Before Dispatch
D28 M11 nozzles, M11 ceramic nozzle holders, high-power protective windows and lens components for the Raytools BM115, supplied to 6-12 kW plants, OEM builders and dealers across India. Send your head photo - we confirm the fitment, quote with GST, and dispatch the same day from Ahmedabad.
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