PM-728VT Spindle Bushing
thingiverse
I printed this to make the quill and spindle a solid assembly when converting the PM-728 to CNC. Prior to this, the spindle made a noise/vibration due to the motion of the spline connection. I removed the spring and existing bushing then used a M20x1.0 nut on top of this bushing. I also loaded the space with a generous amount of "sticky grease" which is thick so it won't run out quickly. M20-1.0 Nut: https://www.amazon.com/dp/B018R9VYNW Sticky Grease: https://www.amazon.com/dp/B00F9R94HY
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