Hephestos Idler Pulley

Idler pulley (containing a B623ZZ bearing), for BQ Prusa i3 Hephestos’s X- and Y-axis belts (6 mm GT2).

I think juanjaem’s design is much better than BQ’s original which, after several hundred hours’ use on my Hephestos, cracked, loosening its grip on the bearing so that the two halves would move apart and grind loudly against the stationary enclosure.

This remix fits better (when printed on my Hephestos).