● Covered by 1 source · 1 reportLow impact1 negative
Bondtech admits Prusa CORE One+ INDX kits shipped with mislabeled, softer steel nozzles
Key points
- Bondtech mislabeled nozzles in Prusa CORE One+ INDX kits as "hardened steel".
- Nozzles are nitrocarburized steel, with 30-32 HRC hardness, not 55-60 HRC.
- Softer nozzles will wear faster with abrasive filaments.
- Bondtech has no immediate solution or compensation plan for affected customers.
Nozzle Mislabelling Discovered
Bondtech, the manufacturer of the INDX toolchanger system for the Prusa CORE One+ INDX, has admitted to a significant labeling error. The nozzles provided with the INDX kit were advertised as "hardened steel" but are in fact made of nitrocarburized steel.
Hardness Discrepancy
While nitrocarburized steel nozzles are superior to standard brass nozzles, they do not meet the hardness standards of true hardened steel. Bondtech stated that their nitrocarburized nozzles measure around 30-32 on the Hardness Rockwell C scale (HRC), whereas hardened steel typically measures 55-60 HRC. Brass nozzles are under 10 HRC.
Impact on Abrasive Filaments
For most users and non-abrasive materials, the nitrocarburized steel nozzles will perform well. However, when printing with abrasive filaments such as glass-fiber, carbon-fiber, glow-in-the-dark, or metal-filled materials, these nozzles will experience accelerated wear compared to true hardened steel nozzles.
Manufacturing Challenges and Lack of Immediate Solution
Bondtech attributed the use of nitrocarburized steel to manufacturing challenges encountered during production, where cutting tools could not reliably machine the harder material. The company has stated that a "concrete solution" for manufacturing truly hardened INDX nozzles is not yet available and could take months. Bondtech is not currently offering compensation and has asked customers to continue using the kits with non-abrasive materials until a resolution is found.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
Bondtech acknowledged that the nozzles included in the Prusa CORE One+ INDX 3D printer kits were advertised as "hardened steel" but are actually nitrocarburized steel, which is softer. This discrepancy means the nozzles will experience accelerated wear when printing with abrasive filaments, contrary to customer expectations for hardened steel components.