Hardware-free_Four-wire twenty-axis_Soft dart bearing tube_Universal/Flea dedicated

This hardware-free bearing tube for foam dart blasters is inspired by MAX ONE's hardware-free 16-axis bearing tube. The issue is that most 3D printed bearing tubes, due to printer characteristics, place stress on the threads along the Z-axis, making them prone to breakage with slight impact or incorrect force. Traditional bearing tubes are also cumbersome to install. This bearing design proactively sacrifices the outer casing or mounting base to avoid repeatedly replacing the bearing itself

Installation only requires a 1.75mm filament strand; insert it, cut it, and you'll get an experience almost identical to the metal version

The bearing includes pressure relief holes, which can to some extent reduce ejection resistance and wake turbulence

An STP file for the specialized outer casing is provided, allowing you to modify it yourself to be thicker or longer as you wish

The bearings are mainly divided into four types: two universal models and two specialized models for Flea. The universal models can quickly switch outer casings or be used exposed by changing the locking base

The specialized Flea models are further divided into versions with an installable outer shell and versions without one. Both require the threads on the Flea's outer barrel for installation. Of course, you can print the universal base, which matches the threads of the Flea's outer barrel. The version without an installable outer shell can also be converted into a standard version using the universal outer shell, but pay attention to the inner tube gap; the specialized version might have an excessively long insertion depth if placed on other blaster inner tubes

For the universal models, since the outer casing serves as the mounting base, you'll need to print a matching wrench to assist with tightening; otherwise, you'll encounter installation difficulties. For ease of testing, I only printed the locking part; the locking part functions correctly and is suitable for other foam dart blasters

Due to the separation of the international and China sites, the model was resynchronized from the China site, losing its past reviews and other data Please understand