Jump Spool / SMB spool (SCUBA)

A typical size jump/SMB/finger spool, in several line capacities.

Printable with no support. Printable on small machines.

I have successfully printed these in PLA, ABS, TPE (NinjaFlex), and TPU. (TPU is actually a pretty good choice, since it will flex rather than crack if it gets smashed between tanks, etc. TPE is a little soft, but also okay.)

If you print the sides and/or the hub out of a semi-pliable material (TPU, TPE), try the side not labeled "clearance"; parts should fit together firmly depending on the precision of your printer. Use your judgement whether you want glue.

If you print all three pieces out of rigid material (PLA, PETG, ABS) (or if your printer is a little loose) then you may need to use the side marked "clearance" -- these leave a little extra room in the mating area. Again, use your judgement whether to use glue based on actual fit, which will depend on the precision of your printer. (The "clearance" side can be visually identified by the