Nothing more than a block holding a pair of ball bearings really. They don't need to be precision high-speed bearings.
I have a miniature set that is part of a fixture for straightening aluminum arrow shafts. Beats buying new shafts every time one gets tweaked from taking a hard hit. I have even used it to balance the rotor blade assemblies on my RC helicopter back in the day.
I'm just looking to step up in size so that I can handle larger shafts / projects. Folks like Keith Fenner (Turn Wright Machine Works) rely on them for the bulk of his business rebuilding marine shafting.
By the way, he has some great machining videos on YouTube, well worth watching if you haven't seen them.
I have a miniature set that is part of a fixture for straightening aluminum arrow shafts. Beats buying new shafts every time one gets tweaked from taking a hard hit. I have even used it to balance the rotor blade assemblies on my RC helicopter back in the day.
I'm just looking to step up in size so that I can handle larger shafts / projects. Folks like Keith Fenner (Turn Wright Machine Works) rely on them for the bulk of his business rebuilding marine shafting.
By the way, he has some great machining videos on YouTube, well worth watching if you haven't seen them.
Willie