Multicolor hand spinner
thingiverse
You need to halt the printing process to insert a precisely fitted M8 nut and a high-quality ball bearing. The correct specifications for this critical component are crucial, so make sure you get it right. For the ball bearing, we're looking at an outer diameter of exactly 22 millimeters, while the inner diameter is a precise 8 millimeters. Its overall height must be precisely 7 millimeters to ensure smooth operation.
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