rotatable collet holder
holds up to 10pcs ER11 collets
but is stackable as well for more collets
tap 3x the M3 thread in "part2"
press 1x 608ZZ bearing in "part2"
mount "part3" on "part2" by using M3x6 screw
press 1x M8x40 hexagon head in "part1"
(when stack you need a longer screw plus one more bearing)
STEP files are included as well in case you would like to modify by yourself
part1 resolution: 0.2mm 20% infill
part2 resolution: 0.2mm 20% infill
part3 resolution: 0.2mm 100% infill