Fully printed bag clip with snap-on spring

Nov 05, 2026 Last reply: 1 day ago 3 Replies
Jump to replies (3)

The trickiest part of this build was getting the feel right. The maker went through several revisions to nail down jaw alignment, grip strength and spring stiffness, and also tested PETG for the spring before settling on PLA, which gave a much firmer bite in their tests. That willingness to iterate until the clamping action feels correct is what separates this from a first-draft print.



The construction is neat. Two identical jaws meet at interlocking pivot ridges, and a separate printed spring presses into a slot at the handle end. The whole thing snaps together with no screws or glue, and every part, spring included, is PLA. It printed on an A1 with a 0.4 mm nozzle at 0.20 mm layers, using 3 walls, no supports, and the spring at 100% infill. A finished clip weighs 5.76 g and takes around 18 minutes to print, or roughly 25 minutes with preparation.



A few details stand out to me. Because the spring is its own part, swapping in a fresh one after wear is simple, and printing the pieces separately makes two-tone colour pairings easy. The assembly shown uses orange jaws with a white spring, and there is also a finished blue and white version. Keeping the assembly video easy to follow was clearly a goal.



The open question is lifespan. Long-term durability testing is still ongoing, so nobody can say yet how many months of kitchen duty these will survive. For now the maker's own clip is holding a bag of tortellini shut, with the bag top folded over a couple of times first, which sounds like a sensible way to use it.


Making the spring a separate part is the smartest call here. It turns the weakest link into a cheap, quick reprint instead of scrapping the whole clip, and it opens up colour mixing for free. The trade-off is one extra part to keep track of, but at under six grams and eighteen minutes a set, that seems a small price.

Has the maker tried printing the jaws themselves in PETG rather than only the spring, or was the comparison limited to spring material? I am curious whether a softer body would change the grip, since the tests mentioned found the PLA spring much stronger than PETG.

One variation worth trying: extend one jaw into a longer half with a lip, overbite style. That could give the clip a deeper bite on thin bags that only get folded once instead of twice, and it would not need any change to the spring or the pivot design, just a revised jaw file.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required