{"product_id":"608-zz-bearings","title":"608-ZZ Bearings","description":"\u003cp\u003e\u003cstrong\u003e10-pack of 608-ZZ double-shielded miniature radial ball bearings\u003c\/strong\u003e for 8 mm shaft\/idler positions in 3D-printer motion projects, Polyformer builds, BeltDrivenEnder3 mods, and ERCF\/Rabbit-style assemblies.\u003c\/p\u003e\n\u003ch3\u003eWhy use ZZ instead of 2RS?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eZZ means \u003cstrong\u003emetal shields on both sides\u003c\/strong\u003e: lower drag than rubber-sealed 2RS bearings while still helping keep grease in and debris out.\u003c\/li\u003e\n\u003cli\u003eThe standard \u003cstrong\u003e608 size\u003c\/strong\u003e is the common 8 mm bore bearing used in printed idlers, rollers, spool holders, and small mechanical assemblies.\u003c\/li\u003e\n\u003cli\u003eIf the bearing will see dust, filament crumbs, or more contamination, use the rubber-sealed \u003ca href=\"https:\/\/dfh.fm\/products\/608-2rs-bearings\"\u003e608-2RS Bearings\u003c\/a\u003e instead.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e 10 bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart code \/ MPN:\u003c\/strong\u003e 608ZZ \/ 608-ZZ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 8 mm ID × 22 mm OD × 7 mm width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing type:\u003c\/strong\u003e single-row deep-groove radial ball bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosures:\u003c\/strong\u003e double metal shielded (ZZ)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical material:\u003c\/strong\u003e steel bearing rings and balls with pressed-steel cage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePrinter\/project fit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUseful as replacement 608-size bearings for Polyformer motion assemblies; see the \u003ca href=\"https:\/\/dfh.fm\/products\/polyformer-bearings-kit\"\u003ePolyformer Bearings Kit\u003c\/a\u003e if you want the project bearing set.\u003c\/li\u003e\n\u003cli\u003eAlso tagged for BeltDrivenEnder3 motion use; pair with the \u003ca href=\"https:\/\/dfh.fm\/products\/beltdrivenender3-kit-by-kevinakasam\"\u003eBeltDrivenEnder3 Kit by kevinakasam\u003c\/a\u003e when you are building or refreshing that mod.\u003c\/li\u003e\n\u003cli\u003eFits generic 8 mm shaft\/idler roles where the BOM calls for 608ZZ, 608-ZZ, or a shielded 608 bearing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGotchas\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThese are \u003cstrong\u003enot rubber sealed\u003c\/strong\u003e; for higher contamination protection, choose 608-2RS.\u003c\/li\u003e\n\u003cli\u003eThese are \u003cstrong\u003enot flanged\u003c\/strong\u003e and not a linear bearing.\u003c\/li\u003e\n\u003cli\u003eConfirm your BOM wants a 608-size bearing: 608 is 8×22×7 mm, not 625, 623, MR85, or LM8UU.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dfh.fm","offers":[{"title":"Default Title","offer_id":42636159123678,"sku":"8053817870","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/9767\/0313\/products\/Untitled9.png?v=1648870276","url":"https:\/\/formosissima.myshopify.com\/products\/608-zz-bearings","provider":"dfh.fm","version":"1.0","type":"link"}