{"data":{"make":{"id":"3263789","created":"2026-02-28T16:21:45.636774+00:00","edited":null,"deleted":null,"isMake":true,"printer":{"id":"749","name":"Prusa MK4S","__typename":"PrinterTypeType"},"parent":null,"author":{"id":"1031","handle":"Marteinn3DPIcel_1031","verified":false,"dateVerified":null,"publicUsername":"Marteinn - 3DP Iceland","avatarFilePath":"media/auth/avatars/30/300ab722-d43c-46c1-b93f-a0b9517a4858.png","badgesProfileLevel":{"profileLevel":13,"__typename":"BadgesProfileLevelType"},"__typename":"UserType"},"images":[{"id":"3095105","filePath":"media/comment_images/63/c42b52-5db0-41c5-b8b1-61b4cf858ae2/20260228_161902.jpg","rotation":0,"__typename":"CommentImageType"}],"mentions":[],"text":"works great, - easy to print and takes no time.","rating":5,"likesCount":0,"liked":null,"membershipAgeMonths":null,"modelData":{"model":{"id":"1272221","ratingAvg":"5.0000000000","ratingCount":2,"__typename":"PrintType"},"__typename":"ModelDataType"},"membershipTier":null,"__typename":"PrintCommentType","model":{"eligibleForNomination":true,"id":"1272221","slug":"filament-bending-test","name":"Filament bending test","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"5.0000000000","myRating":null,"ratingCount":2,"description":"

Brittle filaments will break inside those teflon tubes if they are bended too much. With this equipment, we can have measured numbers.

This tester will be regularly used on the MyTechFun channel (with brittle filaments).

If you add a color change from 5.2mm, you can have the scale in different color. No supports needed, I printed mine with 3 walls and 30% infill.

Update: After so many testings, I have enough experience to make this scale:

If the breaking angle (X = BREAK - START) is
X<=45\u00b0 Very brittle filament, big chance that it will break in H2S, Q2, K1 Max printers
45< X <= 55\u00b0 Moderately brittle
55< X <= 65\u00b0 Low brittleness
X > 65\u00b0 Not brittle

Just a short example (from 2:12):

","category":{"id":"40","path":[{"id":"1","name":"3D Printers","nameEn":"3D Printers","description":"Upgrading and improving your 3D printer couldn't be easier - no matter whether you're looking for functional or aesthetic modifications. Discover the best improvements.","__typename":"CategoryType"},{"id":"40","name":"Accessories","nameEn":"Accessories","description":"Add cool improvements to your 3D printer - drybox, filament buffer, or extruder visualizer. These smart ideas will make your printer even better!","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2026-01-03T22:15:44.198992+00:00","firstPublish":"2025-04-21T12:05:07.194531+00:00","datePublished":"2026-01-03T22:15:44.182527+00:00","dateCreatedThingiverse":null,"nsfw":false,"aiGenerated":false,"politicalContent":false,"summary":"Brittle filaments will break if they are bended (mostly CF filaments). With this tool, we can have measurable value.","likesCount":25,"makesCount":2,"liked":null,"printDuration":null,"numPieces":0,"weight":null,"nozzleDiameters":null,"usedMaterial":null,"layerHeights":null,"mmu":false,"materials":[],"dateFeatured":null,"downloadCount":156,"displayCount":632,"filesCount":2,"privateCollectionsCount":15,"publicCollectionsCount":11,"pdfFilePath":"media/prints/1272221/pdfs/1272221-filament-bending-test-527364b8-0288-4d47-9bbf-2e4666149d1b.pdf","commentCount":2,"userGcodeCount":0,"remixCount":0,"canBeRated":false,"addMakePermission":null,"printer":null,"image":{"id":"4370564","filePath":"media/prints/9bdcb8ea-d47d-4ebf-9c6f-b3de4d533825/images/9559643_66a757f8-927f-42c7-ba1b-f69a4243fa59_c3d83fa1-7042-48ac-9269-6e1628ad4bbd/20250413_234540.jpg","rotation":0,"imageHash":"oycGLwSAmHhYhod7ZkaniYeIx07232UI","imageWidth":1080,"imageHeight":1080,"__typename":"PrintImageType"},"images":[{"id":"4370564","filePath":"media/prints/9bdcb8ea-d47d-4ebf-9c6f-b3de4d533825/images/9559643_66a757f8-927f-42c7-ba1b-f69a4243fa59_c3d83fa1-7042-48ac-9269-6e1628ad4bbd/20250413_234540.jpg","rotation":0,"imageHash":"oycGLwSAmHhYhod7ZkaniYeIx07232UI","imageWidth":1080,"imageHeight":1080,"__typename":"PrintImageType"}],"imagesCount":1,"tags":[{"name":"filament","id":"303","__typename":"TagType"},{"name":"filamenttest","id":"13199","__typename":"TagType"}],"thingiverseLink":null,"filesType":null,"previewFile":{"id":"5308210","filePreviewPath":"media/prints/4e34880e-78df-4bb4-93a0-d1168508f508/previews/372068cd4962558d2452323778d19cb9dda3332d.png","__typename":"STLType"},"license":{"id":"1","disallowRemixing":false,"__typename":"LicenseType"},"remixParents":[],"remixDescription":null,"easyprintProjects":[],"__typename":"PrintType","user":{"id":"170542","handle":"MyTechFun","verified":false,"dateVerified":null,"publicUsername":"MyTechFun","avatarFilePath":"media/auth/avatars/0d/0d4f2551-7a55-4e7f-8b45-0ddc1537093e.png","badgesProfileLevel":{"profileLevel":18,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isFollowedByMe":false,"canBeFollowed":true,"designer":false}},"unavailableModel":null,"replies":[]}}}

Filament bending test

Filament bending test

Comments