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tightening torque for copper heater block / nozzle

it is stated that when using the combination of copper heater block and nozzle, no hot tightening is required. (source) With this in mind, some questions come to my mind:

1) Using copper HB and Nzl and assembling “cold” which torque should I apply? The same 3 Nm that I use to apply on the hot Aluminium/brass assembly?

2) What would be the assembling instructions for: (same old “hot” tightening at 3Nm?)

2.1) Brass nozzle / copper HB

2.2) Copper nozzle / Aluminium HB

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1 Answer

Hi George,

Thank you for linking to the statement, I have had a word with the marketing team to ensure that the statement is removed from the website as it is very misleading.

Plated copper components require the same Hot-tightening procedure as you would expect with our other components. Ie, if you are printing above 285°C you need to hot tighten at a temperature at least 10°C above the temperature you will be printing at.

In terms of recommended torque the same 3nm is suggested.

Apologies for any inconvenience this may have caused.

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George will be eternally grateful.
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