{"product_id":"5x-miniature-ball-bearings-zz-shielded-mini-bearing","title":"5x Small Miniature Ball Bearings Mini Bearing Model Complete Affordable Cheapest","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003ch2 class=\"hdiy-overview\"\u003eMiniature Ball Bearings — ZZ-Shielded Precision Rolling Elements for Tight Spaces\u003c\/h2\u003e\n\u003cp\u003eWhen a seized bearing brings a 3D printer, RC drivetrain, or small motor to a halt, finding the right replacement fast matters. Hobbyists, makers, and repair technicians who work with compact rotating assemblies need miniature ball bearings that fit precisely, spin freely, and hold up to repeated use without adding bulk or weight to the build.\u003c\/p\u003e\n\u003cp\u003eEach pack contains 5 ZZ-shielded miniature ball bearings made from chrome steel with dual metal dust shields on both faces. Available in 13 standard models ranging from 623ZZ (3×10×4 mm \/ 0.12×0.39×0.16 in) up to 629ZZ (9×26×8 mm \/ 0.35×1.02×0.31 in), covering bore diameters of 3–9 mm and outer diameters of 10–26 mm.\u003c\/p\u003e\n\u003cp\u003eTypical applications include FDM and resin 3D printer carriages and extruder idlers, RC car wheel hubs and differential assemblies, inline skate and skateboard wheel cores, small DC and stepper motor shaft supports, and DIY CNC axis linear motion systems requiring compact radial load support.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e Compatible with standard 6xx and 62x series bearing seats. Verify bore (ID), outer diameter (OD), and width against your housing before ordering.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Miniature Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eZZ Dual Metal Shields\u003c\/strong\u003e\n\u003cp\u003eBoth faces sealed with pressed-steel shields to block dust, swarf, and light moisture from reaching the raceway — no additional sealing required in most dry environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eChrome Steel Construction\u003c\/strong\u003e\n\u003cp\u003eRings and balls machined from chrome steel (typically GCr15 equivalent) for consistent hardness and fatigue resistance across the full load cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003e13 Standard Models\u003c\/strong\u003e\n\u003cp\u003eCovers 604ZZ through 688ZZ in a single listing — bore sizes 3–9 mm, OD 10–26 mm, widths 4–8 mm — matching the most common miniature bearing seats in hobby and light-industrial equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003ePack of 5\u003c\/strong\u003e\n\u003cp\u003eFive bearings per order lets you stock spares, replace a full axis set, or outfit multiple assemblies in one purchase without over-ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003ePre-Greased Raceways\u003c\/strong\u003e\n\u003cp\u003eFactory-applied grease between the shields provides immediate lubrication on installation, reducing break-in wear and extending service intervals in low-to-moderate speed applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eDrop-In Replacement Fit\u003c\/strong\u003e\n\u003cp\u003eDimensions conform to ISO\/JIS miniature bearing standards, making these a direct swap for worn OEM bearings in 3D printers, RC vehicles, power tools, and small appliances.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Miniature Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003eDeep groove ball bearing, ZZ (dual metal shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003e6xx \/ 62x miniature series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Models\u003c\/th\u003e\n\u003ctd\u003e604ZZ, 605ZZ, 606ZZ, 607ZZ, 608ZZ, 623ZZ, 624ZZ, 625ZZ, 626ZZ, 628ZZ, 629ZZ, 685ZZ, 688ZZ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter (ID)\u003c\/th\u003e\n\u003ctd\u003e3–9 mm (0.12–0.35 in) — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e10–26 mm (0.39–1.02 in) — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003e4–8 mm (0.16–0.31 in) — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShield Type\u003c\/th\u003e\n\u003ctd\u003eZZ — pressed steel, non-contact, both sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eFactory grease (pre-lubricated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e5 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Direction\u003c\/th\u003e\n\u003ctd\u003eRadial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTolerance Class\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right model for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch three dimensions to your housing: bore diameter (ID) to your shaft, outer diameter (OD) to your housing bore, and width to the available axial space. All three values are listed in the model name — for example, 608ZZ = 8 mm ID × 22 mm OD × 7 mm wide. Measure your existing bearing with calipers before ordering if you are unsure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does \"ZZ\" mean on a bearing designation?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eZZ indicates that both faces of the bearing are fitted with pressed-steel (metal) shields. These shields block coarse contaminants and retain grease without contacting the inner ring, which keeps friction low. They are suitable for dry or lightly dusty environments. For wet or heavily contaminated conditions, look for RS (rubber-sealed) variants instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings pre-lubricated?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Each bearing leaves the factory with grease applied between the shields and the raceway. For most hobby and light-duty applications this is sufficient for the life of the bearing. If you are running at elevated speeds or temperatures, you may wish to add a compatible bearing grease after removing the shields.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these fit my 608ZZ skateboard or inline skate wheels?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 608ZZ variant (8 mm ID × 22 mm OD × 7 mm wide) is the global standard for skateboard, longboard, and inline skate wheels. Select the 608ZZ model from the dropdown and it will drop directly into any standard wheel core without modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these in a 3D printer (e.g., Ender, Prusa, Voron)?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 608ZZ is widely used for extruder idler pulleys and Z-axis lead screw supports on many FDM printers. Smaller models such as 604ZZ and 623ZZ are common in compact extruder designs and belt tensioners. Check your printer's BOM or part drawings to confirm the exact model required before selecting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I remove the shields for cleaning or re-greasing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eZZ metal shields are typically retained by a snap ring seated in a groove on the inner ring. Use a thin pick or dental tool to carefully lever the shield out from the snap-ring groove — work around the circumference gradually to avoid bending. Clean the raceway with isopropyl alcohol, allow to dry, apply fresh bearing grease, and re-seat the shield.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the load capacity of these miniature bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDynamic and static load ratings vary by model size. As a general reference, the 608ZZ carries a dynamic radial load of approximately 3.25 kN and a static load of 1.37 kN under standard conditions. Smaller models (604ZZ, 623ZZ) have proportionally lower ratings. Contact us to confirm load data for your specific model and duty cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e\n\u003cp\u003e🛒 Select your Model above, then add to cart.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"604ZZ(4*12*4mm)","offer_id":52410221396242,"sku":"LXDBJT00284x5","price":4.34,"currency_code":"USD","in_stock":true},{"title":"605ZZ(5*14*5mm)","offer_id":52410221429010,"sku":"LXDBJT00279x5","price":4.34,"currency_code":"USD","in_stock":true},{"title":"606ZZ(6*17*6mm)","offer_id":52410221461778,"sku":"LXDBJT00275x5","price":4.42,"currency_code":"USD","in_stock":true},{"title":"607ZZ(7*19*6mm)","offer_id":52410221494546,"sku":"LXDBJT00274x5","price":4.61,"currency_code":"USD","in_stock":true},{"title":"608ZZ(8*22*7mm)","offer_id":52410221527314,"sku":"LXDBJT00272x5","price":5.29,"currency_code":"USD","in_stock":true},{"title":"623ZZ(3*10*4mm)","offer_id":52410221560082,"sku":"LXDBJT00281x5","price":4.34,"currency_code":"USD","in_stock":true},{"title":"624ZZ(4*13*5mm)","offer_id":52410221592850,"sku":"LXDBJT00278x5","price":4.34,"currency_code":"USD","in_stock":true},{"title":"625ZZ(5*16*5mm)","offer_id":52410221625618,"sku":"LXDBJT00283x5","price":4.34,"currency_code":"USD","in_stock":true},{"title":"626ZZ(6*19*6mm)","offer_id":52410221658386,"sku":"LXDBJT00277x5","price":4.61,"currency_code":"USD","in_stock":true},{"title":"628ZZ(8*24*8mm)","offer_id":52410221691154,"sku":"LXDBJT00273x5","price":5.97,"currency_code":"USD","in_stock":true},{"title":"629ZZ(9*26*8mm)","offer_id":52410221723922,"sku":"LXDBJT00282x5","price":6.38,"currency_code":"USD","in_stock":true},{"title":"685ZZ(5*11*5mm)","offer_id":52410221756690,"sku":"LXDBJT00280x5","price":4.34,"currency_code":"USD","in_stock":true},{"title":"688ZZ(8*16*5mm)","offer_id":52410221789458,"sku":"LXDBJT00276x5","price":4.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture6of7_010faf6f-3163-4d44-93ad-f9880fbf2ea7.jpg?v=1782390255","url":"https:\/\/homediyer.com\/products\/5x-miniature-ball-bearings-zz-shielded-mini-bearing","provider":"HomeDIYer","version":"1.0","type":"link"}