{"product_id":"miniature-deep-groove-ball-bearings-693zz-699zz-small-double-shielded-bearings","title":"Miniature Deep Groove Ball Bearings 693ZZ - 699ZZ Small Double Shielded Bearings","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eMiniature Deep Groove Ball Bearings 693ZZ–699ZZ — Precision Double-Shielded for Tight Spaces\u003c\/h2\u003e\n\u003cp\u003eWhen your build demands reliable rotation in a compact footprint, undersized or mismatched bearings cause wobble, premature wear, and costly rework. Engineers, hobbyists, and repair technicians working on RC vehicles, 3D printers, drones, and precision instruments need bearings that fit exactly right and stay quiet under load. These miniature deep groove ball bearings — spanning the 693ZZ through 699ZZ series — are engineered for applications where every millimeter counts.\u003c\/p\u003e\n\u003cp\u003eEach bearing in this series features a steel inner and outer ring with a full complement of hardened steel balls and double metal shields (ZZ) on both sides to retain grease and exclude contaminants. Bore diameters range from 3 mm (0.118 in) to 9 mm (0.354 in), with outer diameters from 8 mm (0.315 in) to 20 mm (0.787 in) and widths from 4 mm (0.157 in) to 6 mm (0.236 in), covering the most common miniature bearing sizes in a single product family.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include spindle assemblies in desktop CNC routers, idler pulleys in CoreXY 3D printers, motor shaft support in brushless drone motors, and wheel axles in 1\/10-scale RC cars — all scenarios where a low-profile double-shielded miniature ball bearing for precision equipment delivers the smooth, low-friction rotation that keeps your project running at its best.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eCompatible with:\u003c\/strong\u003e RC cars \u0026amp; trucks · 3D printers (CoreXY, delta, bed-slinger) · Brushless motors \u0026amp; ESC assemblies · Drones \u0026amp; quadcopters · Robotics joints · Precision instruments · Skateboard wheels · Fidget spinners\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\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eDouble Metal Shield (ZZ)\u003c\/strong\u003e — Dual steel shields on both faces retain factory-applied grease and block dust, metal chips, and moisture from reaching the ball track, extending service life in workshop and outdoor environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eFull 693ZZ–699ZZ Size Range\u003c\/strong\u003e — Seven bore sizes from 3 mm to 9 mm in a single consistent series, letting you stock one product family for multiple projects without hunting for individual sizes across different suppliers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eDeep Groove Raceway Design\u003c\/strong\u003e — The deep groove geometry handles both radial and moderate axial (thrust) loads simultaneously, making these bearings suitable for shafts that experience combined loading during operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eHardened Steel Construction\u003c\/strong\u003e — Inner ring, outer ring, and balls are manufactured from bearing-grade steel with hardening treatment for dimensional stability and resistance to deformation under rated load conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Available in 1, 10, 50, 100, and 300-piece packs so you can order a single replacement bearing or stock up for production runs and repair kits without overpaying for unnecessary quantity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eLow Torque, Smooth Rotation\u003c\/strong\u003e — Precision-ground raceways and consistent ball sizing deliver low starting torque and smooth running, reducing heat buildup and power draw in motor-driven applications such as 3D printer extruder idlers and RC drivetrain components.\u003c\/li\u003e\n\u003c\/ul\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\u003e693ZZ, 694ZZ, 695ZZ, 696ZZ, 697ZZ, 698ZZ, 699ZZ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShield Type\u003c\/th\u003e\n\u003ctd\u003eDouble metal shield (ZZ) — both sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter (d)\u003c\/th\u003e\n\u003ctd\u003e3 mm – 9 mm (0.118 in – 0.354 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (D)\u003c\/th\u003e\n\u003ctd\u003e8 mm – 20 mm (0.315 in – 0.787 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth (B)\u003c\/th\u003e\n\u003ctd\u003e4 mm – 6 mm (0.157 in – 0.236 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Material\u003c\/th\u003e\n\u003ctd\u003eBearing-grade hardened steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBall Material\u003c\/th\u003e\n\u003ctd\u003eHardened steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCage Material\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eFactory-applied grease (sealed by ZZ shields)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRadial Clearance\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Speed\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically –10°C to +110°C (14°F to 230°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Pack Quantities\u003c\/th\u003e\n\u003ctd\u003e1 pcs \/ 10 pcs \/ 50 pcs \/ 100 pcs \/ 300 pcs\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 bearing size from the 693ZZ–699ZZ range?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the bore diameter (d) to your shaft diameter and the outer diameter (D) to your housing bore. For example, if your shaft is 5 mm and your housing accepts a 13 mm OD, select the 695ZZ (5×13×4 mm). Always verify all three dimensions — bore, outer diameter, and width — before ordering, as a bearing that fits the shaft but not the housing will not seat correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does the ZZ designation mean on these bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eZZ indicates double metal shields — one pressed-steel shield on each side of the bearing. The shields retain the factory grease inside the bearing and prevent external contaminants such as dust, metal filings, and light moisture from entering the ball track. ZZ bearings are non-contact shields, meaning they do not touch the inner ring, which keeps friction and running torque lower than rubber-sealed (2RS) bearings while still providing adequate protection for most indoor and light-duty outdoor applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these miniature bearings handle both radial and axial loads?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The deep groove raceway geometry allows these bearings to carry both radial loads (perpendicular to the shaft) and moderate axial (thrust) loads in either direction. They are not designed for heavy axial-only applications — for those, angular contact or thrust bearings are more appropriate — but for typical combined-load scenarios in RC cars, 3D printers, and robotics, the deep groove design performs well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings corrosion-resistant? Can I use them in damp environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese bearings are manufactured from standard bearing-grade steel, which offers moderate corrosion resistance when the ZZ shields keep moisture away from the balls and raceways. For occasional light moisture exposure, the factory grease provides a protective barrier. However, for continuous wet, submerged, or highly corrosive environments, stainless steel bearings (suffix SS or AISI 440C) are recommended instead. If you need stainless variants, please contact us to confirm availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pack size should I order for a repair or production run?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eFor a single repair or prototype, the 1-piece pack lets you source exactly what you need without excess stock. The 10-piece pack suits small batch builds or keeping a few spares on hand. For production runs, workshop stock, or resale, the 50, 100, and 300-piece packs offer progressively lower per-unit cost. Select your size and quantity combination from the variant options above to see the exact price per pack.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these bearings compatible with standard 3D printer and RC car applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The 693ZZ–699ZZ series covers the most common miniature bearing sizes used in 3D printers (such as 625ZZ-equivalent sizes for idler pulleys and extruder assemblies) and RC vehicles (wheel axle and drivetrain bearings). Always cross-reference the bore, outer diameter, and width against your specific printer or vehicle model's bearing specification before ordering to confirm fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCan I re-lubricate or clean these ZZ-shielded bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eZZ metal shields can be carefully removed with a thin pick or scribe to allow cleaning and re-lubrication, unlike rubber-sealed (2RS) bearings which are more difficult to re-seal. After cleaning with a suitable solvent and re-packing with bearing grease, the shields can be pressed back into the outer ring groove. This is practical for low-speed, high-contamination applications where periodic maintenance is part of the workflow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size and packing quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"693ZZ(3x8x4mm) \/ 1 pcs","offer_id":52410764362002,"sku":"GYWYPSHXJZC5836x1","price":1.75,"currency_code":"USD","in_stock":true},{"title":"694ZZ(4x11x4mm) \/ 1 pcs","offer_id":52410764394770,"sku":"GYWYPSHXJZC5837x1","price":1.75,"currency_code":"USD","in_stock":true},{"title":"695ZZ(5x13x4mm) \/ 1 pcs","offer_id":52410764427538,"sku":"GYWYPSHXJZC5838x1","price":1.75,"currency_code":"USD","in_stock":true},{"title":"696ZZ(6x15x5mm) \/ 1 pcs","offer_id":52410764460306,"sku":"GYWYPSHXJZC5839x1","price":1.75,"currency_code":"USD","in_stock":true},{"title":"697ZZ(7x17x5mm) \/ 1 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