{"data":{"model":{"id":"144943","slug":"constant-mesh-two-speed-gearbox","name":"Constant Mesh Two Speed Gearbox","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"4.9090909091","myRating":null,"ratingCount":11,"description":"

In this type of gearbox, all the gears of the main shaft are in constant mesh with the corresponding gears of the countershaft. A sliding dog clutch is provided on the main shaft.
Gear ratios 0.75, 1.33 and neutral.
This model was designed in Tinkercad.
3-speed gearbox with reverse gear : Constant Mesh 3 Speed Gearbox with Reverse Gear by Bootjevaarder | Download free STL model | Printables.com

Printing and Assembly
The parts should be printed on a smooth build plate, not textured.
If possible, avoid elephant foot.

I printed the model on a PRUSA MINI, with PLA+ filament, layer height 0.15 mm.
I use Hard Plastic Glue where necessary.

For assembled and exploded views, use .stl files A0\u2026 X0\u2026 (do not print).
Printing and assembly in alphabetical order (A1 \u2192 X1).

Choise between Spur and Herringbone gears (A4 B2).

Dimensions: 95 x 63 x 101 mm.
Weight: 0.1 kg.

Join gearbox to \u201c4 Stroke Flathead Engine\u201d (= 135305)
Print parts X1 \u2192 X5.
4 Stroke Flathead Engine by Bootjevaarder | Download free STL model | PrusaPrinters

To couple the gearbox to the engine, the \u201cCranked Handle\u201d of the engine must be removed.

The engine, coupling bracket and gearbox click into the \u201cX1-Sled\u201d.
Important: Part \u201cX2-Coupling Bracket\u201d must be assembled in the correct orientation (ARROW).

Operation
Use the cranked handle to rotate the gearbox / engine.
To couple / uncouple the gearbox from the engine, use \u201cX5-Coupling Selector Fork\u201d.
For shifting gears, use \u201cA3-Selector Fork\u201d.

","category":{"id":"93","path":[{"id":"90","name":"Learning","nameEn":"Learning","description":"Be inventive! Learn about the world around you and print tools to help you understand. If you are a teacher you will appreciate these educational tools.","__typename":"CategoryType"},{"id":"93","name":"Engineering","nameEn":"Engineering","description":"Become a 3D printing engineer. Combine different methods of manufacturing. Improve existing solutions or make a prototype with mechanical parts.","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2023-11-15T06:25:52.447036+00:00","firstPublish":"2022-03-07T18:58:39.845173+00:00","datePublished":"2023-11-15T06:25:52.433564+00:00","dateCreatedThingiverse":null,"nsfw":false,"summary":"Stand-alone two speed gearbox model, can be joined to \"4 Stroke Flathead Engine\".","likesCount":349,"makesCount":15,"liked":null,"printDuration":null,"numPieces":0,"weight":null,"nozzleDiameters":null,"usedMaterial":null,"layerHeights":null,"mmu":false,"materials":[],"dateFeatured":null,"downloadCount":861,"displayCount":6896,"filesCount":23,"privateCollectionsCount":212,"publicCollectionsCount":188,"pdfFilePath":"media/prints/144943/pdfs/144943-constant-mesh-two-speed-gearbox-5253e365-562b-4f19-9f42-7348151f7354.pdf","commentCount":33,"userGcodeCount":0,"remixCount":0,"canBeRated":false,"printer":null,"image":{"id":"706061","filePath":"media/prints/144943/images/1391981_af5be4e1-b00a-425c-9cae-f84e6b6f7003/infill.jpg","rotation":0,"imageHash":"YigKDYb3R4d+l2d3dmiYeRxqoHAn","imageWidth":1416,"imageHeight":1062,"__typename":"PrintImageType"},"images":[{"id":"706061","filePath":"media/prints/144943/images/1391981_af5be4e1-b00a-425c-9cae-f84e6b6f7003/infill.jpg","rotation":0,"imageHash":"YigKDYb3R4d+l2d3dmiYeRxqoHAn","imageWidth":1416,"imageHeight":1062,"__typename":"PrintImageType"},{"id":"703001","filePath":"media/prints/144943/images/1385510_78cd38df-01e6-4b73-877e-8b53834b3ff7/p3075664.jpg","rotation":0,"imageHash":"XSgGFYj3VodvhneGd3l3ig2JtIA4","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},{"id":"702999","filePath":"media/prints/144943/images/1385511_b962fa2b-dec2-475f-8f63-2a83a89c1b42/p3075673.jpg","rotation":0,"imageHash":"XygKDYb5VIt8doh3h1eXeAtrgpA3","imageWidth":1531,"imageHeight":1148,"__typename":"PrintImageType"},{"id":"695789","filePath":"media/prints/144943/images/1370140_00554764-3335-46f0-a185-abf5761d3067/foto0.jpg","rotation":0,"imageHash":"NQgODYL3WGd5h4iKdniIegqIkIAY","imageWidth":1105,"imageHeight":829,"__typename":"PrintImageType"},{"id":"695785","filePath":"media/prints/144943/images/1370127_8723a657-fb59-4115-9390-8e17fee67c5e/foto00.jpg","rotation":0,"imageHash":"NAgSDYL3SXiId3iKdoh3iSeHcHAY","imageWidth":1066,"imageHeight":800,"__typename":"PrintImageType"},{"id":"695787","filePath":"media/prints/144943/images/1370135_c1901fe4-fc35-4235-98fb-ee1eabf62593/foto1.jpg","rotation":0,"imageHash":"NQgKBYLWiJh1eImPhqZ5iWqboLQI","imageWidth":1195,"imageHeight":896,"__typename":"PrintImageType"},{"id":"695786","filePath":"media/prints/144943/images/1370134_06aecbc2-0781-48c2-919e-774a24c0e0ef/foto2.jpg","rotation":0,"imageHash":"+PcFBYB3eLtHd5mPh5iKh1U5L/DS","imageWidth":1233,"imageHeight":925,"__typename":"PrintImageType"},{"id":"695788","filePath":"media/prints/144943/images/1370138_29f43d61-182b-49f7-bbaa-62bdcd973254/foto3.jpg","rotation":0,"imageHash":"NggKDYLi31eIhnqbZ3WGi3+s88Y6","imageWidth":1141,"imageHeight":856,"__typename":"PrintImageType"}],"tags":[],"thingiverseLink":null,"filesType":null,"previewFile":{"id":"595214","filePreviewPath":"media/prints/144943/stls/1371846_26eff5fe-1c62-4ef8-a028-9e2ddcbc49eb/a0-gearbox-assembled-do-not-print_preview.png","__typename":"STLType"},"license":{"id":"6","disallowRemixing":true,"__typename":"LicenseType"},"remixParents":[],"remixDescription":null,"__typename":"PrintType","user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isFollowedByMe":false,"isHiddenForMe":false,"canBeFollowed":true,"billingAccountType":"personal","lowestTierPrice":null,"highlightedModels":{"models":[{"id":"630206","name":"Christmas Lantern","slug":"christmas-lantern","ratingAvg":"4.9782608696","likesCount":2136,"liked":null,"datePublished":"2024-12-13T21:04:46+00:00","dateFeatured":null,"firstPublish":"2023-10-30T13:39:10+00:00","downloadCount":6549,"mmu":false,"category":{"id":"70","path":[{"id":"65","name":"Seasonal designs","nameEn":"Seasonal designs","__typename":"CategoryType"},{"id":"70","name":"Winter & Christmas & New Year's","nameEn":"Winter & Christmas & New Year's","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2025-01-23T11:01:25.985709+00:00","image":{"id":"2363860","filePath":"media/prints/630206/images/5002206_b496f5eb-42a3-4d56-bca7-ec688b24b70e_c975c8c1-837f-404a-ab20-ed2d59d2ea96/foto5.jpg","rotation":0,"imageHash":"zFkGHYAIOMRXx2mBapmKdwhW0FBp","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"878041","name":"V-Engine KeyRing","slug":"v-engine-keyring","ratingAvg":"4.8000000000","likesCount":1740,"liked":null,"datePublished":"2024-06-17T10:28:03.575348+00:00","dateFeatured":null,"firstPublish":"2024-05-16T07:23:40.572555+00:00","downloadCount":5656,"mmu":false,"category":{"id":"43","path":[{"id":"21","name":"Gadgets","nameEn":"Gadgets","__typename":"CategoryType"},{"id":"43","name":"Other Gadgets","nameEn":"Other Gadgets","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-06-17T10:28:03.601481+00:00","image":{"id":"3139506","filePath":"media/prints/878041/images/6749027_4b92767b-58ee-4c77-87d8-5bbbb1efca0f_52a68baa-7422-442a-b49e-2fefc2fae985/foto3.jpg","rotation":0,"imageHash":"pRgKFYSkdYeqaIiPllh1lwV4YIAH","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"493994","name":"PushRod Engine with Gearbox","slug":"pushrod-engine-with-gearbox","ratingAvg":"4.8750000000","likesCount":1556,"liked":null,"datePublished":"2024-04-03T08:04:27.327395+00:00","dateFeatured":null,"firstPublish":"2023-09-29T10:44:40.123742+00:00","downloadCount":1973,"mmu":false,"category":{"id":"93","path":[{"id":"90","name":"Learning","nameEn":"Learning","__typename":"CategoryType"},{"id":"93","name":"Engineering","nameEn":"Engineering","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-04-03T08:04:27.340406+00:00","image":{"id":"2256729","filePath":"media/prints/493994/images/4763684_1ab01576-76a7-4e01-9d59-888e466454d6_e55cdd55-3b2c-4a95-8a72-5be608488275/foto1.jpg","rotation":0,"imageHash":"JggKDYTxeWeId4eedWd3eA6Jw4BY","imageWidth":1569,"imageHeight":1177,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"180357","name":"Motorcycle Roller Chain Key Ring","slug":"motorcycle-roller-chain-key-ring","ratingAvg":"4.8750000000","likesCount":1480,"liked":null,"datePublished":"2023-09-29T20:04:06.480163+00:00","dateFeatured":null,"firstPublish":"2022-04-28T14:01:16.356175+00:00","downloadCount":3638,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2023-09-29T20:04:06.491179+00:00","image":{"id":"830813","filePath":"media/prints/180357/images/1687309_066f4607-0a81-422e-acf9-294c6237d038/p4285709.jpg","rotation":0,"imageHash":"GSkGDYLw14qbSHePhbZmitaaPz/o","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"239197","name":"OHC V60 Ultramax Engine","slug":"ohc-v60-ultramax-engine","ratingAvg":"5.0000000000","likesCount":1112,"liked":null,"datePublished":"2023-11-15T06:24:28.300478+00:00","dateFeatured":"2023-03-01T09:13:02.801490+00:00","firstPublish":"2022-09-18T12:32:04.795755+00:00","downloadCount":1322,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2023-11-15T06:24:28.315717+00:00","image":{"id":"1210824","filePath":"media/prints/239197/images/2468556_7a84451f-4091-48af-b33d-78694530baad/foto1.jpg","rotation":0,"imageHash":"WikGLYZgeYiWd4WMdkeYhPSHW3+o","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"112243","name":"Motorcycle Key Ring","slug":"motorcycle-key-ring","ratingAvg":"4.8571428571","likesCount":721,"liked":null,"datePublished":"2024-12-27T09:35:22.456774+00:00","dateFeatured":null,"firstPublish":"2022-01-04T14:36:12.050282+00:00","downloadCount":2758,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-12-27T09:35:22.492980+00:00","image":{"id":"1135207","filePath":"media/prints/112243/images/2302278_ad8dc4f6-6193-41b9-8cd1-ea77657ef3f1/foto11.jpg","rotation":0,"imageHash":"2hgKJYShd4iPh3eZhmiHmJuJz3f4","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"379935","name":"4 Stroke Flathead Boxer Engine","slug":"4-stroke-flathead-boxer-engine","ratingAvg":"4.9000000000","likesCount":622,"liked":null,"datePublished":"2024-06-26T06:57:10.914195+00:00","dateFeatured":null,"firstPublish":"2023-02-10T09:28:08.840552+00:00","downloadCount":1042,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-06-26T06:57:10.926065+00:00","image":{"id":"2351032","filePath":"media/prints/379935/images/4974387_05881860-e54f-43a3-8213-b456b3b93ccd_526faa34-2206-4690-8768-1dc452f7f248/foto1.jpg","rotation":0,"imageHash":"pBgGJYTAmKeneHmNh5Z2iylnkHIG","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"693343","name":"V90 Pushrod OHV Engine","slug":"v90-pushrod-ohv-engine","ratingAvg":"5.0000000000","likesCount":604,"liked":null,"datePublished":"2024-11-11T11:26:54.672894+00:00","dateFeatured":null,"firstPublish":"2024-10-11T19:03:06.160722+00:00","downloadCount":707,"mmu":false,"category":{"id":"93","path":[{"id":"90","name":"Learning","nameEn":"Learning","__typename":"CategoryType"},{"id":"93","name":"Engineering","nameEn":"Engineering","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-11-11T11:26:54.688897+00:00","image":{"id":"3643273","filePath":"media/prints/693343/images/7873648_d00ae5d0-e3e1-4c23-870c-7e69b250f0e0_06199727-12f0-4ed0-82db-856e3231ef6d/foto1a.jpg","rotation":0,"imageHash":"bQgODYL2iIiaZot6eLZ3eAh2k2A3","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":{"ranking":null,"competitionId":"453","__typename":"PrintLatestCompetitionResult"},"__typename":"PrintType"}],"featured":false,"__typename":"HighlightedModelsType"},"designer":false,"stripeAccountActive":true,"membership":null},"contests":[],"contestsResults":[],"prusameterPoints":null,"latestContestResult":null}}}