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Watch as the twisted, star-shaped central shaft seamlessly spirals all the way through the spherical shell, creating an incredibly smooth, continuous mechanical motion.\n\nDesigned by a Mechanical Design Engineer, this model is a perfect combination of geometry and precision engineering. The assembled sphere rests comfortably in your hands, making it a premium anti-stress desk toy.\n\nPremium feel \u0026 smart design:\n\nDimensions: The model is designed with a 80 mm sphere diameter for a substantial, premium feel in the hand.\n\nScalability: Both parts can be easily scaled up or down together in your slicer to fit your preferences or build plate size.\n\nEffortless Insertion: To ensure the shaft enters the sphere effortlessly from either side, the model features smart 1 mm chamfers on both ends of the shaft and the hole openings.\n\nFlush Fit: The top and bottom openings feature specially designed contoured recesses, allowing the ends of the shaft to sit perfectly flush with the sphere's surface for a truly seamless look when fully inserted.\n\nOptimized Base: The base of the sphere has a clean flat cut with a 2 mm fillet for optimal bed adhesion.\n\nTactile Comfort: The rest of the geometry is softened with perfectly smooth 0.5 mm fillets for a flawless tactile grip and reduced friction.\n\nPrint Settings\nThis model is highly optimized for flawless FDM printing and a satisfying mechanical fit.\n\nMaterial: PLA, PETG, or Silk PLA (Silk filaments look absolutely stunning with the curved reflections of the spherical shape!).\n\nOrientation: Print the central shaft standing vertically. 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It can completely prevent material leakage and dust emission, while providing a stable installation reference for the screw assembly, perfectly adapting to the working conditions of inclined conveying.\nScrew Conveying Assembly: The core working component is a continuous screw blade welded to the central transmission shaft. Driven by the motor to rotate, it pushes the material upward along the U-shaped trough through spiral thrust. The blade is made of wear-resistant material, which can adapt to materials with different characteristics and ensure conveying stability and equipment service life.\nDrive Unit: The top of the equipment integrates a motor and reduction mechanism, providing stable and adjustable power output for the screw shaft. 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I mainly build this thing jut for fun and to show people what the possibilities are with 3D-printed parts because some people still think 3D-prints are not functional and you can only make vases, figures or boats with a 3D-printer. 3D-printed parts of course have their limits like you'll see in the video ;-). Almost every part in this build is 3D-printed, except for the shafts bearings, nuts and bolts etc.\n\nTo drive the shredder i used the gearbox i mentionned above. Video can be found here:\nhttps://youtu.be/d8us3OWgS1A\n\nThe gearbox was powered by a 3S 2200mah LIPO battery With the help of the Universal Motion Controller i made. It's possible to run the gearbox on a 6S LIPO but this would destroy the gears almost immediately in this application.\n\nThank you to Banggood for providing me with the Ender-3 V2 3D-printer.You can buy one here:\nhttps://www.banggood.com/custlink/3v3hCfiZyI\n\nVideo can be found here:\nhttps://youtu.be/IN2g572FZOo\n\nMore info can be found here:\nhttps://hackaday.io/project/175900-3d-printable-shredder\n\nComponents used:\n1 × 3D-printable 775 gearbox\nlink to the project:\nhttps://hackaday.io/project/173854-3d-printed-high-torque-servogearbox-version-2\n\n2 × 25x25x277 aluminium profile (see drawing in the files section for exact meassurements\nlook in your local hardware store to find one.\n\n4 × 6707 -2RS bearing\nlink:\nhttps://shop.jvl-europe.com/epages/61425996.sf/nl_NL/?ObjectPath=/Shops/61425996/Products/6707-2RS\n\n1 × 3D-printed parts\nlink to Thingiverse:\nhttps://www.thingiverse.com/thing:4654798\n\n60 × around 60 screws of 30mm lenght\ndimension: 4.5mm diameter, 30mm 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The original one had a gear ratio of 30:1 and the speed of the output shaft was about 715 RPM which made it difficult to tune in the right PID parameters. This new version has a gear ratio of about 162:1 which lowers the speed and increases the torque of the output shaft.\n\nI choose to go for double helical gears on this one because they produce a lot less noice than regular spur gears and the forces on the teeth are transferred more gradually. The gears rotate around a 6mm stainless steel shaft which is lubricated with bearing grease. Ideally all the gears should have some bearings, this is being considered for the next moment. Unlike my previous design I used 2 20mm bearings to support the output shaft.\n\nThe servo uses a 775 36V 9000rpm brushed DC-motor which is driven by my Universal Morion Controller (UMC)(\nhttps://www.thingiverse.com/thing:4245315\n). The stall torque theoretically is about 297kg/cm, I was able to test the servo to a torque of about 132kg/cm. During testing none of the gears broke, they were all printed in PLA. The weak link in this design however where the mounting tabs and the bevel gears used in the first stage on the motor shaft. These 2 gears tend to slip under high loads ,like when i tried to pull the car forwards with it's handbrake on, but this didn't occur when i performed the test where it pulled 132kg/cm of torque so it should be fine to at least this torque rating.\n\nVideo can be found here:\nhttps://youtu.be/d8us3OWgS1A\n\nMore info can be found here:\nhttps://hackaday.io/project/173854-3d-printed-high-torque-servogearbox-version-2\n\nComponents used:\n\n11 × 3D printed components\nCan be found on Thingiverse\n\n1 × 775 brushed motor\nlink:\nhttps://www.banggood.com/775-Gear-Motor-DC-12V-36V-3500-9000RPM-Motor-Large-Torque-High-power-Motor-p-1091058.html?p=E01411629100201406T1\u0026custlinkid=255143\n\n1 × M3 Bolt and nut 30mm\ndimension: 30mm lenght, Used to secure the small possition feedback gear to the 20mm shaft\n\n1 × Universal Motion Controller\nAnother project of mine used to control and drive the servo:\nhttps://hackaday.io/project/170604-umc-universal-motion-controller\n\n1 × heat shrinks\nhttps://www.banggood.com/328pcs-Heat-Shrink-Tubing-Insulation-Electrical-Shrinkable-Tube-Sleeve-Cable-21-p-1362019.html?p=E01411629100201406T1\u0026custlinkid=669227\n\n2 × 6mm stainless steel shafts\nlink:\nhttps://www.banggood.com/681012mm-Diameter-550mm-Length-Linear-Rail-Shaft-Rod-for-3D-Printer-p-1533105.html?p=E01411629100201406T1\u0026custlinkid=1206718\n\n7 × screws 30mm lenght\ndimension: 4.5mm diameter, 30mm lenght, Used to mount the lid\n\n2 × 20mm inner diameter 6004 bearings (204212mm)\nlink:\nhttps://www.banggood.com/Deep-Groove-Ball-Bearings-6000-60052RS-High-Speed-Bearing-Steel-p-942862.html?p=E01411629100201406T1\u0026custlinkid=1206865\n\n2 × Screws 15mm lenght\ndimension: 4.5mm diameter, 15mm lenght, Used to mount the motor\n\n1 × 10K potentiometer\nlink:\nhttps://www.banggood.com/5pcs-200V-0_2W-10K-Ohm-Potentiometer-Single-Linear-p-961348.html?p=E01411629100201406T1\u0026custlinkid=1206871\n\n2 × M5 bolt and nut 40mm\ndimension: 40mm lenght, Used to secure 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In addition, it helps you to create a more correct form in the designing of many metal, wooden and plaster objects.\n\n\nIt is called Logalithmic Spiral or Fibonacci in mathematics.\n\n\n**How to use?**:\nTo use it, just put the script in the Max Startup folder so that Max recognizes it at the next start. In this case, a new modifier which is named \"__QM__SpiralBend\" will appear in the list of modifiers. Then it is possible to select and apply it to the object.\n\n\n**Startup directory**:\n- C:\\Program Files\\Autodesk\\3ds max 20XX\\scripts\\Startup\n\n\n**Note**: in 3DsMax 2015 sometimes when any scripted modifier (even the examples provided by the MaxScript reference) is added to the object, 3DsMax crashes. 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So you can print with %20 infill and 0.2 mm layer height for stationary parts.\nYou should print the gears with lower layer height (0.12 mm -0.16 mm). 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The flag of Iraq consists of the three equal horizontal red, white, and black stripes of the Arab Liberation flag, with the takbir written in green in the Kufic script in the centre. The Republic of Iraq is a country in West Asia and a core country in the geopolitical region known as the Middle East. 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A \"filled-in\" helix – for example, a \"spiral\" (helical) ramp – is a surface called a helicoid.","imageAlt":"3D A golden Helix","url":"https://www.cgtrader.com/3d-models/various/various-models/a-golden-helix","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/ZNFrRMC8yxJiUk8k8vPpnuHW/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/Golden%20hHelix%204.jpg","gridUrl":"https://media.cgtrader.com/variants/ZNFrRMC8yxJiUk8k8vPpnuHW/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/Golden%20hHelix%204.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/various/various-models/a-golden-helix","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":117,"name":".gltf","is_native":false},{"id":21,"name":".blend","is_native":false},{"id":null,"name":null,"is_native":false},{"id":17,"name":".max","is_native":false}],"categorySlug":"various","subcategorySlug":"various-models","categoryTitle":"Various","subcategoryTitle":"Various models","schemaImageUrl":"https://img-new.cgtrader.com/items/5443578/bf3c9ccbf2/a-golden-helix-3d-model-bf3c9ccbf2.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false}},{"id":"4758389","type":"listingItem","attributes":{"id":4758389,"title":"Helical Flexure Hinge","price":6.0,"description":"3D printable Helical Flexure Hinge model.\n\nDimensions: 30.00 x 30.00 x 37.00 mm\n\nThis hinge can directly transform linear motion into rotational motion. Two flat platforms are connected by helical links. Constraints are applied on the platforms such that only translational motion along the z-axis direction can be generated as the input, while only rotational motion around the z-axis direction can be simultaneously achieved in the output end through the spatial deformations of the helical links.\n\nSource of design: http://linkinghub.elsevier.com/retrieve/pii/S0094114X15001433\n\nModeled in Solid Edge ST10 and rendered in KeyShot 11.\n\nStep file and 3d print files (obj, stl, 3mf) of the model are included.\n\nIf you want me to scale the model according to your dimensions, just send me a message.\n\nIn addition to native Solid Edge Part File (.par), following file formats of the model are included as well:\n1. Autodesk Inventor Part file (.ipt)\n2. File formats (.3mf, .obj, .stl, .fbx, .glb, .ply)  \n3. File formats (.step, .igs, .sat, parasolid)   \n\nA 3D pdf file of the model is added as well.  All of the above rendered images are included in a zip file.\n\nIf you want me to scale the model according to your dimensions, just send me a message.","imageAlt":"Helical Flexure Hinge 3D print model","url":"https://www.cgtrader.com/3d-print-models/hobby-diy/robotics/helical-flexure-hinge","isCLDApplicable":false,"isSaleOffApplicable":false,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/nT5c7Epc88gkFxRZV1nZkx1z/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/2.jpg","gridUrl":"https://media.cgtrader.com/variants/nT5c7Epc88gkFxRZV1nZkx1z/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/2.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/hobby-diy/robotics/helical-flexure-hinge","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":70,"name":".asm","is_native":true},{"id":71,"name":".iam","is_native":false},{"id":5,"name":".fbx","is_native":false},{"id":117,"name":".gltf","is_native":false},{"id":29,"name":".ige","is_native":false},{"id":210,"name":".x_t","is_native":false},{"id":72,"name":".stp","is_native":false},{"id":28,"name":".hrd","is_native":false},{"id":215,"name":".png","is_native":false},{"id":216,"name":".jpg","is_native":false},{"id":129,"name":".3mf","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":100,"name":".pdf","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"hobby-diy","subcategorySlug":"robotics","categoryTitle":"Hobby \u0026 DIY","subcategoryTitle":"RC \u0026 Robotics","schemaImageUrl":"https://img-new.cgtrader.com/items/4758389/535a2e3793/helical-flexure-hinge-3d-model-535a2e3793.webp","saleOffDiscount":0,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":false}},{"id":"6115931","type":"listingItem","attributes":{"id":6115931,"title":" MOBILE SPIRAL CONVEYOR  MOBILE SCREW CONVEYOR","price":10.0,"description":"diameter 168 mm x 4000 mm MOBILE SPIRAL CONVEYOR.\nEASY MANUFACTURING.\nPORTABLE.\nWHEELED.\nEASY MANUFACTURING.\nALL PARTS BUT HELIX SELECTION IS YOUR MATERIAL\ndiameter 168 mm x 4000 mm MOBILE SCREW CONVEYOR.\n\nHELICAL\nPORTABLE.\nWHEELED.\nEASY MANUFACTURING.\nALL PARTS BUT SCREW SELECTION IS YOURS FOR YOUR MATERIAL","imageAlt":"MOBILE SPIRAL CONVEYOR MOBILE SCREW CONVEYOR 3D model","url":"https://www.cgtrader.com/3d-models/industrial/industrial-machine/mobile-spiral-conveyor-mobile-screw-conveyor","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/f1hjcxe0sthxbytr8px0zyhtqg61/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/DASH-MNTJ-7-a.jpg","gridUrl":"https://media.cgtrader.com/variants/f1hjcxe0sthxbytr8px0zyhtqg61/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/DASH-MNTJ-7-a.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/industrial/industrial-machine/mobile-spiral-conveyor-mobile-screw-conveyor","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":72,"name":".stp","is_native":false},{"id":4,"name":".dwg","is_native":false},{"id":210,"name":".x_t","is_native":false},{"id":null,"name":null,"is_native":false},{"id":59,"name":".sldprt","is_native":false}],"categorySlug":"industrial","subcategorySlug":"industrial-machine","categoryTitle":"Industrial","subcategoryTitle":"Machine","schemaImageUrl":"https://img-new.cgtrader.com/items/6115931/159f6a2c68/mobile-spiral-conveyor-mobile-screw-conveyor-3d-model-159f6a2c68.webp","saleOffDiscount":30,"eligibleForSubscription":false,"subscriptionSubscribed":true,"subscriptionPotential":false}},{"id":"3432492","type":"listingItem","attributes":{"id":3432492,"title":"SPEED REDUCER GEAR BOX WORM HELICAL WPX","price":11.0,"description":"The model contains the most popular formats:\n1. 3DS MAX: *.max\n2. 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Perfect for both digital and physical mechanical design projects.\n\nNative Autodesk Inventor 2012 files are provided with intact browser trees and parameter tables to allow full configurability and customization.\n\n\n**Collection includes 3 gear systems:**\n\n- Rack and pinion system\n- Bevel gear system (1:1 ratio)\n- Worm gear system (16:1 reduction ratio)\n\n\n**Collection includes 6 models:**\n\n- Bevel gear, 16-tooth, round bore with keyway (1.00in pitch diameter, 25.4mm reference diameter)\n- Spur gear, 8-tooth, D-profile bore (0.50in pitch diameter, 12.7mm reference diameter)\n- Spur gear, 16-tooth, round bore with keyway (1.00in pitch diameter, 25.4mm reference diameter)\n- Gear rack, 16-tooth (4.00in (101.6mm) eye-to-eye distance)\n- Spacer, round bore (0.25in (6.35mm) face width)\n- Helical worm, D-profile bore (0.50in pitch diameter, 12.7mm reference diameter)\n\n\nAll gear tooth profiles are precisely modeled with accurate arc-based geometry and a small amount of backlash to ensure proper engagement.\n\nAll gears are provided with a diametrical pitch of 16 teeth/inch (module 1.6). 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Download additional gear collections:**\n\n- Assorted Gear Collection 01 - https://www.cgtrader.com/3d-print-models/hobby-diy/mechanical-parts/ultimate-gear-collection\n- Spur Gear Collection 01 - https://www.cgtrader.com/3d-print-models/hobby-diy/mechanical-parts/spur-gear-collection\n- Planetary Gear Collection 01 - https://www.cgtrader.com/3d-print-models/hobby-diy/mechanical-parts/planetary-gear-collection\n\n\nIf you have any questions, either before or after purchasing this model collection, please feel free to contact me here on CGTrader and I will help in any way possible.\n\n_CBSpicer_","imageAlt":"3D printable model Gear Accessory Collection 01","url":"https://www.cgtrader.com/3d-print-models/hobby-diy/mechanical-parts/gear-accessory-collection","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/T8v7aoXAEocpszUc3rx5EKMU/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/_Accessories_Iso.jpg","gridUrl":"https://media.cgtrader.com/variants/T8v7aoXAEocpszUc3rx5EKMU/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/_Accessories_Iso.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/hobby-diy/mechanical-parts/gear-accessory-collection","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":71,"name":".iam","is_native":false},{"id":29,"name":".ige","is_native":false},{"id":147,"name":".sat","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":72,"name":".stp","is_native":false}],"categorySlug":"hobby-diy","subcategorySlug":"mechanical-parts","categoryTitle":"Hobby \u0026 DIY","subcategoryTitle":"Mechanical parts","schemaImageUrl":"https://img-new.cgtrader.com/items/694209/137b0c61da/gear-accessory-collection-01-3d-model-137b0c61da.webp","saleOffDiscount":30,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true}},{"id":"4758381","type":"listingItem","attributes":{"id":4758381,"title":"Helical Stair Railings","price":5.0,"description":"Helical Stair Railing Designs. 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