3D Printer Spool Hub
thingiverse
I made and evaluated several hubs. Type-A: One side is a ball bearing, the other side is a friction bearing. The hub turns lightly but the filament does not loosen - it's good performance. The M6 screw rod was used for the shaft. The ball bearing is made of polyacetal with an outer diameter of 26 mm, inner diameter of 6 mm and a thickness of 7 mm. Type-B: The M8 screw rod was used for the shaft. It was attached to JGAURORA A3. The hub turns directly on the M8 threaded rod. I'm concerned about wear. Both types A and B conform to the following spools: Polymakr Black Spool 55.2mm (54.4mm) eSUN Black Spool 53.5mm (52.8mm) eSUN Clear Spool 51.60mm (51.0mm)
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