- Stock: 3
- Model: CHCB-OT-Hotend
The Trianglelab CHCB-OT, developed with Omranello, is a modular high-performance hotend for selected Creality printers. This product is the 24 V version with a 100K B3950 NTC thermistor and a 0.4 mm Brass ZS MK8 Standard nozzle.
Its ceramic heater surrounds the melt zone while the hot core and stainless mounting flange remain separate. This supports component-level maintenance and reduces heat transfer toward the heatsink.
Specifications
| Feature | Value |
|---|---|
| Supply | 24 V DC |
| Rated power | 67 W at 24 °C; stated range 61-77 W |
| Cold resistance | 7.5-9.5 Ω |
| Sensor | 100K B3950 NTC, 1% |
| Included nozzle | Trianglelab ZS MK8 Standard Brass, 0.4 mm |
| Filament | 1.75 mm |
| Maximum temperature | Up to 300 °C, limited by printer, firmware and weakest component |
Nominal demand is approximately 2.79 A, while the resistance tolerance corresponds to 2.53-3.20 A cold. Heater output, fuse, connector and wiring need suitable margin.
Printer compatibility
- Creality K1 and K1 Max: replacement subject to matching mount, length and connectors.
- Creality Ender-3 V3 KE: listed by Trianglelab; compare toolhead revision.
- Ender-3 V3 SE: shown with a condition and may require mounting or wiring adaptation.
- CR-M4, CR-10 Smart Pro and Ender-3 S1: integration with a compatible Sprite toolhead after checking board, mount and connectors.
K1C and other lookalike models are not added; Trianglelab uses different references and revisions for other geometries.
Nozzles and maintenance
CHCB-OT uses the Trianglelab ZS MK8 nozzle family. A visually similar MK8 thread does not guarantee matching length, seat and melt-zone geometry. After replacement, check sealing, effective length and Z offset.
- Unload filament and allow the assembly to cool.
- Switch off and unplug before handling heater or sensor.
- Support the block while working and never twist ceramic-heater leads.
- Ensure the nozzle seals against the intended internal surface.
- Route and strain-relieve wiring away from fans, carriage and print.
Sensor configuration
- Marlin: Trianglelab specifies
#define TEMP_SENSOR_0 1for this B3950 version. Keep thermal protection enabled. - Klipper: use
sensor_type: Generic 3950on a compatible input and pull-up. - RepRapFirmware 3: an adaptable definition is
M308 S1 P"e0temp" Y"thermistor" T100000 B3950.
Check a plausible room reading and smooth rise before heating to print temperature. Then run PID/MPC for the installed assembly rather than reusing old values.
First commissioning
- Verify 24 V, connectors and output capacity.
- Check the sensor at room temperature with the heater disabled.
- Perform a supervised moderate-temperature test.
- Run the firmware's thermal tuning procedure.
- Recalibrate Z offset, flow and retraction.
- Increase throughput gradually with a volumetric-flow test; the advertised “50% more” is not universal.
It is for you if
- Your listed Creality model has a verified matching revision and connectors.
- You want a modular 24 V hotend using ZS MK8 nozzles.
- You can configure B3950 and recalibrate the machine.
It is not for you if
- Your controller is configured for PT1000 and cannot be changed.
- You need compatibility guaranteed by printer name alone.
- Your heater output cannot safely supply up to 3.2 A with margin.
