The Claw - A clamping style filament spool holder

thingiverse

I made a few adjustments. I'm happy to revise if needed. Here's the revised text: Instructions:\n4 x 626 ball bearings are required.\n2 x 10 cm expanding springs are necessary.\na handful of M3 nuts, bolts, and shims will also be used.\nThe printed parts listed below must be printed for assembly. The Thing files may have a different number prefix than what's shown in the pictures. To obtain the desired look, print: 2 x Body (print standing up to avoid overhangs) 2 x Quickrelease (there are nasty overhangs/bridges in this design... I printed it without support with a well-working crossflow-fan setup, but use support if you experience problems) 2 x Holder (to achieve the same distance from the back of the printer as the pulleys on the quick releases will have) 4 x Pulley (print them lying down; they feature in-built support which can be easily removed with pliers - edit: They also seem to be off-scale... Each one must hold a 608zz bearing inside, and its outer diameter should be 34.5mm which equates to a scale factor of 0.4 on all axes) 4 x Skive (these are simply used to hold bearings in place; shims can be substituted if preferred, or you may choose to print two extra for additional clearance behind the lower pulleys) 2 x Tensioner (optional - I chose not to print them... Instead, use M3 bolts, shims, and nuts to fasten the springs through the hole in the bottom of each body part) Additionally, 2 tube inserts were printed for the bearings on the lower pulleys, made using an inner diameter of 3mm and an outer diameter of 8mm. They fit with M3 bolts. (Since I already had them, they're not included in Thing files.) After printing all components, it should be fairly obvious where everything goes, given that each piece has pre-drilled screw holes for attachment. When installing parts by drilling into the back of your printer and mounting pieces, a standard-sized spool works best to maintain distance between components. For accurate alignment, keep one near each set of components you want to place next to each other, maintaining even space apart. I designed it, with Tommyph1208 contributing as well.