Raytools Ceramic Ring – D28 mm – M11
A ceramic ring (ceramic nozzle holder / ceramic body) sits between the cutting head body and the nozzle. It electrically insulates the nozzle for capacitive height sensing and transmits the signal that keeps the stand-off distance accurate, while absorbing impact energy in a crash to protect the head, sensor and optics.
Ceramic body for BM109 / BM111 / BT240 heads with M11 nozzle thread.
Key features
- High-strength zirconia / alumina ceramic: heat resistant and electrically insulating
- Embedded copper contacts for a clean capacitive signal and stable height tracking
- Correct height and thread for a square, play-free seat on the head body
- Sacrificial design: absorbs crash energy before the head, sensor or optics are damaged
- Drop-in replacement for the OEM ceramic body
Specifications
| Brand | Raytools |
| Product type | Ceramic ring |
| Size | D28 mm |
| Thread / Series | M11 |
| Packing | 1 pc / individual pack |
Material: zirconia / alumina technical ceramic with embedded copper contacts
Rated power: up to 4 kW (12 mm series) / higher with body-specific versions
Hardness: Mohs 9
Function: nozzle insulation + capacitive signal transmission
Fit: model-specific thread and height
Compatibility
Designed for Raytools laser cutting heads that use this exact ring size and thread. Ceramic body for BM109 / BM111 / BT240 heads with M11 nozzle thread. If your head has been upgraded or you are unsure, cross-reference the OEM part number or send us a photo of the old part and we will confirm before you order.
Installation & maintenance
- Undo the retaining nut, lift out the damaged ceramic ring and clean the seat of spatter and debris.
- Seat the new ring squarely, then fit the nozzle and run the height-sensor calibration.
- Replace when the ceramic is cracked, chipped, discoloured, or when height alarms and signal drift appear.
- Never overtighten the nut: mechanical stress, not laser heat, is the most common cause of failure.
Why buy from us
- Factory-direct laser consumables with batch inspection
- Stock of the sizes used most on fibre laser cutters, ready to ship
- Volume pricing and mixed cartons for OEMs and service partners
- Technical support to match the part to your cutting head
Not sure which size fits your head? Send us the head model, the OEM part number or a photo of the old part and we will confirm the correct item before you order.