{"product_id":"miniature-deep-groove-ball-bearings-metal-seal-2zz-6900zz-6909zz","title":"Miniature Deep Groove Ball Bearings Metal Seal(2ZZ) 6900ZZ-6909ZZ Bearing Steel","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eMiniature Deep Groove Ball Bearings 6900ZZ–6909ZZ — Reliable Rotation for Tight Spaces\u003c\/h2\u003e\n\u003cp\u003eWhen a motor shaft wobbles, a skateboard wheel drags, or a 3D printer carriage binds, the culprit is almost always a worn or undersized bearing. Engineers, hobbyists, and repair technicians who work with compact rotating assemblies need a bearing that fits precisely, runs quietly, and holds up under repeated load cycles — without sourcing from a specialty distributor at inflated prices.\u003c\/p\u003e\n\u003cp\u003eThese miniature deep groove ball bearings feature a double metal shield (2ZZ) construction machined from bearing-grade steel. The shield keeps lubricant in and contaminants out without adding significant drag. Available sizes span the 690x series: inner diameters from 10 mm (0.39 in) to 45 mm (1.77 in), outer diameters from 22 mm (0.87 in) to 68 mm (2.68 in), and widths from 6 mm (0.24 in) to 12 mm (0.47 in). Each variant is sold in quantities of 1, 4, or 10 pieces to match your project scale.\u003c\/p\u003e\n\u003cp\u003eTypical applications include RC car wheel hubs and differential assemblies, CNC router spindle supports and lead-screw end supports, 3D printer extruder idler pulleys and axis carriages, small electric motor front and rear shaft supports, and inline skate or longboard wheel axle replacements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard 690x-series bearing seats. Verify your bore (ID), housing (OD), and width before ordering. Select your exact size from the variant options above.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Miniature Deep Groove Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eDouble Metal Shield (2ZZ)\u003c\/strong\u003e — Dual steel shields on both sides retain grease and block dust, debris, and moisture from entering the raceway, extending service life in workshop and field environments.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eBearing Steel Construction\u003c\/strong\u003e — Raceways and balls are manufactured from bearing-grade steel, delivering the hardness and fatigue resistance needed for sustained radial and light axial loads.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide Size Range — 6900ZZ to 6909ZZ\u003c\/strong\u003e — Ten standard sizes cover inner diameters from 10 mm to 45 mm and outer diameters from 22 mm to 68 mm, making it straightforward to find a drop-in replacement or design-in fit.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔇\u003c\/span\u003e \u003cstrong\u003eLow-Noise, Smooth Operation\u003c\/strong\u003e — Deep groove geometry and pre-applied grease allow consistent, low-friction rotation at moderate speeds, reducing vibration in sensitive assemblies such as printer carriages and motor shafts.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Choose 1, 4, or 10 pieces per order. Single-piece options suit one-off repairs; 10-piece packs reduce per-unit cost for production runs or stocking a parts drawer.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eDirect-Replacement Dimensions\u003c\/strong\u003e — Conforms to standard 690x-series dimensional tolerances, so these bearings interchange with OEM parts in RC vehicles, power tools, and light industrial equipment without modification.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Miniature Deep Groove Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Series\u003c\/th\u003e\n\u003ctd\u003e690x (6900ZZ – 6909ZZ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShield Type\u003c\/th\u003e\n\u003ctd\u003eDouble metal shield (2ZZ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eBearing steel (raceway \u0026amp; balls)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (ID)\u003c\/th\u003e\n\u003ctd\u003e10 mm – 45 mm (0.39 in – 1.77 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e22 mm – 68 mm (0.87 in – 2.68 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth (Thickness)\u003c\/th\u003e\n\u003ctd\u003e6 mm – 12 mm (0.24 in – 0.47 in) — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003ePre-greased (grease retained by metal shields)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003eDeep groove ball bearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e1 Pcs \/ 4 Pcs \/ 10 Pcs — See variant options\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\u003eMax Speed\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLoad Rating\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 correct bearing size for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the shaft diameter (this becomes your inner diameter \/ ID), the housing bore (this becomes your outer diameter \/ OD), and the available axial space (this becomes the width). Match those three dimensions to the size listed in the variant name — for example, 6902ZZ means ID 15 mm × OD 28 mm × Width 7 mm. If you are replacing an existing bearing, the part number is usually stamped on the shield face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the \"ZZ\" designation mean?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e\"ZZ\" (sometimes written as \"2Z\" or \"2ZZ\") indicates a double metal shield — one on each side of the bearing. The shields are non-contact or lightly contacting and retain the factory-applied grease while blocking coarse contaminants. They are not fully sealed like rubber-contact seals (suffix RS or 2RS), so they are best suited for clean or moderately dusty environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these bearings handle axial (thrust) loads?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eDeep groove ball bearings can accommodate moderate axial loads in addition to their primary radial load capacity. For applications where axial load is the dominant force — such as a vertical shaft with significant downward thrust — a dedicated thrust bearing is more appropriate. For mixed radial and light axial loads (typical in motors, wheels, and pulleys), these bearings perform well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings corrosion-resistant?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese bearings are made from bearing steel, which offers good hardness and fatigue resistance but is not inherently stainless. They are suitable for dry or lightly oiled indoor environments. For applications exposed to water, humidity, or corrosive chemicals, consider stainless steel bearings (suffix SS or AISI 440C) instead. Applying a light coat of compatible grease to the outer race before installation can help in mildly humid conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I buy 1, 4, or 10 pieces?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChoose based on your project needs. A single piece is ideal for a one-off repair or prototype test fit. Four pieces suit a typical four-wheel RC car or a dual-shaft motor assembly with spares. Ten pieces offer the lowest per-unit cost and are practical for production batches, classroom kits, or stocking a repair drawer. All quantities ship as the same bearing — only the pack count differs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat tools do I need to install or remove these bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor light-press fits, a bearing press or a correctly sized socket and mallet is recommended — always press on the ring that is being press-fitted (inner ring onto shaft, outer ring into housing) to avoid transmitting force through the balls. For hand-clearance fits, bearings can often be seated by hand or with light tapping using a plastic mallet. Avoid striking the shield face directly, as this can deform the shield and contaminate the grease.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with 3D printer and CNC machine applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 690x series is widely used in 3D printer extruder idler pulleys, axis carriage linear rod supports, and CNC router spindle end supports. The 6900ZZ (10×22×6 mm) and 6901ZZ (12×24×6 mm) sizes are particularly common in compact extruder and belt-tensioner designs. Confirm the exact ID, OD, and width against your printer or machine's BOM or CAD file before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size (ID×OD×thickness) and quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"6900ZZ-10*22*6mm \/ 1Pcs","offer_id":52410590626066,"sku":"FXL06-0","price":1.48,"currency_code":"USD","in_stock":true},{"title":"6900ZZ-10*22*6mm \/ 4Pcs","offer_id":52410590658834,"sku":"FXL06-1","price":2.43,"currency_code":"USD","in_stock":true},{"title":"6900ZZ-10*22*6mm \/ 10Pcs","offer_id":52410590691602,"sku":"FXL06-2","price":4.88,"currency_code":"USD","in_stock":true},{"title":"6901ZZ-12*24*6mm \/ 1Pcs","offer_id":52410590724370,"sku":"FXL06-3","price":1.56,"currency_code":"USD","in_stock":true},{"title":"6901ZZ-12*24*6mm \/ 4Pcs","offer_id":52410590757138,"sku":"FXL06-4","price":2.57,"currency_code":"USD","in_stock":true},{"title":"6901ZZ-12*24*6mm \/ 10Pcs","offer_id":52410590789906,"sku":"FXL06-5","price":5.78,"currency_code":"USD","in_stock":true},{"title":"6902ZZ-15*28*7mm \/ 1Pcs","offer_id":52410590822674,"sku":"FXL06-6","price":1.7,"currency_code":"USD","in_stock":true},{"title":"6902ZZ-15*28*7mm \/ 4Pcs","offer_id":52410590855442,"sku":"FXL06-7","price":3.47,"currency_code":"USD","in_stock":true},{"title":"6902ZZ-15*28*7mm \/ 10Pcs","offer_id":52410590888210,"sku":"FXL06-8","price":7.87,"currency_code":"USD","in_stock":true},{"title":"6903ZZ-17*30*7mm \/ 1Pcs","offer_id":52410590920978,"sku":"FXL06-9","price":1.75,"currency_code":"USD","in_stock":true},{"title":"6903ZZ-17*30*7mm \/ 4Pcs","offer_id":52410590953746,"sku":"FXL06-10","price":3.93,"currency_code":"USD","in_stock":true},{"title":"6903ZZ-17*30*7mm \/ 10Pcs","offer_id":52410590986514,"sku":"FXL06-11","price":8.28,"currency_code":"USD","in_stock":true},{"title":"6904ZZ-20*37*9mm \/ 1Pcs","offer_id":52410591019282,"sku":"FXL06-12","price":1.97,"currency_code":"USD","in_stock":true},{"title":"6904ZZ-20*37*9mm \/ 4Pcs","offer_id":52410591052050,"sku":"FXL06-13","price":6.19,"currency_code":"USD","in_stock":true},{"title":"6904ZZ-20*37*9mm \/ 10Pcs","offer_id":52410591084818,"sku":"FXL06-14","price":14.81,"currency_code":"USD","in_stock":true},{"title":"6905ZZ-25*42*9mm \/ 1Pcs","offer_id":52410591117586,"sku":"FXL06-15","price":2.03,"currency_code":"USD","in_stock":true},{"title":"6905ZZ-25*42*9mm \/ 4Pcs","offer_id":52410591150354,"sku":"FXL06-16","price":7.06,"currency_code":"USD","in_stock":true},{"title":"6905ZZ-25*42*9mm \/ 10Pcs","offer_id":52410591183122,"sku":"FXL06-17","price":16.99,"currency_code":"USD","in_stock":true},{"title":"6906ZZ-30*47*9mm \/ 1Pcs","offer_id":52410591215890,"sku":"FXL06-18","price":2.43,"currency_code":"USD","in_stock":true},{"title":"6906ZZ-30*47*9mm \/ 4Pcs","offer_id":52410591248658,"sku":"FXL06-19","price":8.55,"currency_code":"USD","in_stock":true},{"title":"6906ZZ-30*47*9mm \/ 10Pcs","offer_id":52410591281426,"sku":"FXL06-20","price":18.75,"currency_code":"USD","in_stock":true},{"title":"6907ZZ-35*55*10mm \/ 1Pcs","offer_id":52410591314194,"sku":"FXL06-21","price":3.52,"currency_code":"USD","in_stock":true},{"title":"6907ZZ-35*55*10mm \/ 4Pcs","offer_id":52410591346962,"sku":"FXL06-22","price":13.04,"currency_code":"USD","in_stock":true},{"title":"6907ZZ-35*55*10mm \/ 10Pcs","offer_id":52410591379730,"sku":"FXL06-23","price":27.73,"currency_code":"USD","in_stock":true},{"title":"6908ZZ-40*62*12mm \/ 1Pcs","offer_id":52410591412498,"sku":"FXL06-24","price":4.83,"currency_code":"USD","in_stock":true},{"title":"6908ZZ-40*62*12mm \/ 4Pcs","offer_id":52410591445266,"sku":"FXL06-25","price":17.61,"currency_code":"USD","in_stock":true},{"title":"6908ZZ-40*62*12mm \/ 10Pcs","offer_id":52410591478034,"sku":"FXL06-26","price":38.42,"currency_code":"USD","in_stock":true},{"title":"6909ZZ-45*68*12mm \/ 1Pcs","offer_id":52410591510802,"sku":"FXL06-27","price":6.05,"currency_code":"USD","in_stock":true},{"title":"6909ZZ-45*68*12mm \/ 4Pcs","offer_id":52410591543570,"sku":"FXL06-28","price":20.66,"currency_code":"USD","in_stock":true},{"title":"6909ZZ-45*68*12mm \/ 10Pcs","offer_id":52410591576338,"sku":"FXL06-29","price":49.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/933187c5-ddb3-40b2-a071-f9e7bbc94e7b.jpg?v=1782478197","url":"https:\/\/homediyer.com\/products\/miniature-deep-groove-ball-bearings-metal-seal-2zz-6900zz-6909zz","provider":"HomeDIYer","version":"1.0","type":"link"}