The Bambu Lab AMS HT Active Support Shaft Assembly is an OEM mechanical component for the AMS HT (Automatic Material System High Temperature). Unlike the passive driven shaft, the active shaft assembly plays a direct role in controlling spool tension and coordinating filament release during print operations. It works in tandem with the driven support shaft to provide stable, controlled unwinding of filament from the spool at the correct rate.

This assembly is needed when the AMS HT shows irregular tension, filament slack, or erratic feeding behavior that points to a fault in the active side of the spool support mechanism. Replacing with a genuine OEM part ensures the precision fit and functional characteristics required for consistent multi-material performance.

Key features

• Genuine OEM active shaft assembly for accurate spool tension control and consistent filament release.
• Works together with the Driven Support Shaft Assembly for balanced, smooth spool operation.
• Factory tolerances ensure correct fit and long-term mechanical reliability in the AMS HT.
• Direct replacement - no modification required for installation.
• Resolves irregular spool tension, filament slack and erratic feeding in the AMS HT.

Compatible with: Bambu Lab AMS HT