How tight do I tighten the thumbscrew on my Bondtech extruder?

Many people ask about how to properly tighten the thumbscrew for the filament tension lever of Bondtech extruders.

Below are instructions provided by Bondtech:

We recommend the following regarding the thumbscrew setup:

When tightening the thumbscrew onto the metal threaded insert use at most 0.4Nm torque (don't force it too much). Using excessive torque will damage the laser sintered nylon that holds the metal insert in place.

Considering the above, tighten it all the way in and then loosen it:

  • 1 to 2 full turns to use hard filament;
  • 3 to 4 full turns to use soft filament (flexible).

It is recommended to perform this procedure with the filament loaded into the extruder.

Jun 08, 2022 Jonah @ Partsbuilt 3D

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