{"product_id":"ultimate-608-bearing-with-calibration-kit-v2","title":"Ultimate 608 Bearing with Calibration Kit V2","description":"\u003cp\u003eVersions:\u003c\/p\u003e\u003cp\u003eV2, 10\/18\/2022: Fixed inner diameter to match 608 specification. Added extreme tolerances for perfectionists.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eUnfortunately, \"Bearing.stl\" is something you can't just download and print. Most of the time it won't work properly because you equipment, material and environment are unique. Should we give up and consider bearings non-printable? I don't think so.\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eThis project's goal is to give you instruments to print 608-size bearings reliably and predictably. I included methodology to achieve the best bearing possible using almost any FDM printer.\u003c\/p\u003e\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/makerworld.bblmw.com\/makerworld\/model\/DSM00000001250495\/design\/be12eeef-bd2d-46f5-b879-7570ddf8e1b1.png\"\u003e\u003c\/figure\u003e\u003ch3\u003eBearing Tolerance Calibration: \u003c\/h3\u003e\u003cp\u003eI achieved the best results with 0.16 layer height and PLA + grease to reduce heating and last bearing lifetime.\u003c\/p\u003e\u003cp\u003eAt first, you need to identify tolerances which will give you the best results. There are 2 tolerances to identify:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eRadial Tolerance (\u003cstrong\u003eRT\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003eTennon Tolerance (\u003cstrong\u003eTT\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eThe goal is to get working bearing with as small RT and TT values as possible. To do that, I suggest using a binary search algorithm. Search for the minimal RT first. Once you have RT, search for minimal TT.\u003c\/p\u003e\u003cp\u003eBinary Search for RT and TT:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eStart with RT=X, and set TT=0.4 while doing that. \u003c\/li\u003e\n\u003cli\u003eX is the variable you are looking for (start with X = 0.2, X_min=0.1, X_max=0.4) and print the right model from calibration folder.\u003c\/li\u003e\n\u003cli\u003eRotate the shaft (the first time it may be hard, use \"tool.stl\"). \u003col\u003e\n\u003cli\u003eIf you are able to rotate it freely afterwards, set X_max = X, X = (X_max + X_min) \/ 2 and repeat 2.\u003c\/li\u003e\n\u003cli\u003eIf the shaft doesn't rotate or you broke the bearing, set X_min = X, X = (X_max + X_min) \/ 2 and repeat 2.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003cli\u003eOnce you found minimal RT, repeat the same to find minimal TT.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003ePrint a lot! \u003c\/h3\u003e\u003cp\u003eYou have one working bearing, great! Since you spent a lot of time on calibration, it would be nice to print a few of them using the same filament and settings. Don't repeat my mistakes, \u003cstrong\u003edon't print them like that \u003c\/strong\u003e(unless you would enjoy 25 non-working bearings):\u003c\/p\u003e\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/makerworld.bblmw.com\/makerworld\/model\/DSM00000001250495\/design\/050c62ca-c16a-4268-9582-7c670e6cf536.jpg\"\u003e\u003c\/figure\u003e\u003cp\u003eIf you print all of them in one go, tolerances may drift. The reason is not clear to me, probably smth related to retracts on a longer distance. Print them one-by-one using Prusa Slicer's \u003ca href=\"https:\/\/help.prusa3d.com\/en\/article\/sequential-printing_124589\" rel=\"ugc\"\u003ePrint Settings  Output Options  Complete individual objects \u003c\/a\u003eand position them far away from each other:\u003c\/p\u003e\u003cfigure class=\"image\"\u003e\u003cimg src=\"https:\/\/makerworld.bblmw.com\/makerworld\/model\/DSM00000001250495\/design\/b72eb9e6-2b84-4f0d-bed7-3e2cd2b9584b.png\"\u003e\u003c\/figure\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eI made those bearings parametrical and thought about making such a kit for all popular bearing sizes, but rendering for 608 size only took ~10 hours. Please let me know in comments if you would like to have the same kit for other bearing sizes.\u003c\/p\u003e\u003cp\u003eDesign by glintX on MakerWorld (license: CC0).\u003c\/p\u003e","brand":"Mymadmanlab","offers":[{"title":"Default Title","offer_id":67446564847920,"sku":null,"price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/0809\/5280\/files\/0_44d58ee2-85eb-4045-bcf6-84b1ce25e330.jpg?v=1785811550","url":"https:\/\/mymadmanlab.com\/products\/ultimate-608-bearing-with-calibration-kit-v2","provider":"Mymadmanlab.com","version":"1.0","type":"link"}