{"product_id":"mr623-zz-bearings","title":"MR623-ZZ Bearings","description":"\u003cp\u003e\u003cstrong\u003e10-pack of MR623-ZZ \/ 623-ZZ miniature shielded ball bearings for ERCF and small 3D-printer motion assemblies.\u003c\/strong\u003e Each bearing is the compact \u003cstrong\u003e3 mm ID × 10 mm OD × 4 mm width\u003c\/strong\u003e size with metal shields on both sides.\u003c\/p\u003e\n\u003ch3\u003eWhy use MR623-ZZ here\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMetal shielded:\u003c\/strong\u003e ZZ shields help keep dust and printed-plastic debris out while staying lower-drag than contact rubber seals.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrect miniature size:\u003c\/strong\u003e 3 × 10 × 4 mm format, also commonly listed as 623-ZZ, 623ZZ, R1030ZZ, or MR623ZZ.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eERCF context:\u003c\/strong\u003e the ERCF v2 community repo documents a plain 623ZZ bearing encoder option for builders maintaining or adapting v1.1-style kits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuantity: \u003cstrong\u003e10 bearings\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eBearing type: miniature radial ball bearing\u003c\/li\u003e\n  \u003cli\u003eSize: \u003cstrong\u003e3 mm bore \/ 10 mm outside diameter \/ 4 mm width\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eShielding: \u003cstrong\u003eZZ\u003c\/strong\u003e, metal shields on both sides\u003c\/li\u003e\n  \u003cli\u003eInterchange\/search terms: MR623-ZZ, MR623ZZ, 623-ZZ, 623ZZ, R1030ZZ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment and related parts\u003c\/h3\u003e\n\u003cp\u003eUseful for ERCF-style filament feeders, encoder mods, and other small printer mechanisms that call for the 3×10×4 mm shielded 623 size. If your build calls for the smaller 5×8×2.5 mm bearing instead, use \u003ca href=\"https:\/\/dfh.fm\/products\/mr85-zz-bearings\"\u003eMR85-ZZ bearings\u003c\/a\u003e. For the current DFH ERCF kit, see the \u003ca href=\"https:\/\/dfh.fm\/products\/enraged-rabbit-carrot-feeder\"\u003eEnraged Rabbit Carrot Feeder\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eNot for\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMR85 \/ 685-size bearing locations — those are a different size.\u003c\/li\u003e\n  \u003cli\u003eWet or dirty environments where a rubber-contact 2RS seal is specifically required.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dfh.fm","offers":[{"title":"Default Title","offer_id":42635931779294,"sku":"5034338572","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/9767\/0313\/products\/C2CE162B-4A12-419F-99AF-BF7D6302679C.png?v=1648867603","url":"https:\/\/formosissima.myshopify.com\/products\/mr623-zz-bearings","provider":"dfh.fm","version":"1.0","type":"link"}