AMS 2 Pro internal hub lever V2

We’ve all been there: You’re mid-project when the AMS 2 Pro stops feeding. You open the hub and find the inevitable—a snapped tension arm. It’s frustrating because you can’t just buy the arm; the "official" solution is a $70+ full hub assembly. I wasn't willing to let my printer sit idle for weeks waiting for a replacement hub, so I designed the V2 Tension Lever.

Why Upgrade to V2? This isn't just a replacement; it’s an evolution. While this performs the same function as the original, the V2 is engineered with reinforced geometry to be significantly stronger. It’s designed to handle the constant spring tension that often causes the stock factory arms (and thinner printed versions) to fail.

• Stop the "Hub Tax": Save $70 and fix the specific failure point yourself.
• Reinforced Design: Extra material in high-stress zones to prevent snapping at the pivot.
• Restore Reliability: Eliminates "failed to feed," "odometer errors," and "failed to pull back" issues by restoring proper filament tension.
• Drop-In Ready: 1:1 fit for the AMS 2 Pro Internal Hub Unit.

Pro-Tip: Even if your AMS is working fine today, print this in ASA or PETG now. Having it in your toolkit means a 15-minute fix instead of a 2-week wait when the stock part eventually gives out.

Recommended Print Settings:

• Material: PETG, ASA, or ABS (Required. PLA will "creep" and lose tension over time).
• Walls: 4 to 6 for maximum structural integrity.
• Infill: 40% to 100% (Solid part for maximum rigidity).

AMS 2 Pro Internal Hub Assist Tension Arm V2, Recommended to Print in PETG 

Update v2.1 1/3/25 The support for the bolt in the center has been adjusted. 

Add more to support the arm and a guide for the spring to help keep it in place.

My V1 model

https://makerworld.com/en/models/2062805-ams-2-pro-internal-hub-assist-tension#profileId-2227366

If you enjoyed printing this, a Like or  Boost would be greatly appreciated!