{"product_id":"304-stainless-steel-high-precision-steel-ball-bearings-dia-0-5mm-2-8mm","title":"304 Stainless Steel High Precision Steel Ball Bearings  Dia 0.5mm-2.8mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003ch2\u003e304 Stainless Steel Precision Ball Bearings — Consistent Roundness for Demanding Rolling Applications\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003cp\u003eWhen a single out-of-tolerance ball causes vibration, noise, or premature wear in a precision assembly, the cost of rework far exceeds the cost of the component itself. Engineers, instrument makers, and DIY builders who work with miniature mechanisms need steel ball bearings they can trust to be round, smooth, and corrosion-resistant right out of the bag — without sorting or regrinding.\u003c\/p\u003e\n\u003cp\u003eThese 304 stainless steel precision ball bearings are manufactured to tight sphericity tolerances and are available in diameters ranging from 0.4 mm to 2.8 mm (approximately 0.016 in to 0.110 in). Each ball is produced from 304-grade austenitic stainless steel, delivering a smooth, bright surface finish suited to low-load, high-cycle rolling contact. Packs are available in quantities of 500, 1,000, or 2,000 pieces per order.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include miniature ball bearing races and retainer assemblies, precision instrument pivots and stylus mechanisms, valve seats in fluid-handling devices, and small-scale robotics or automation components where consistent ball diameter is critical to smooth linear or rotary motion.\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 Note:\u003c\/strong\u003e These balls are intended as loose rolling elements. Verify bore diameter, race groove radius, and load rating of your bearing housing before ordering. Diameter tolerance and surface grade vary by size — contact us to confirm fit for precision-grade assemblies.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These 304 Stainless Steel Precision Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003e304 Stainless Steel Construction\u003c\/strong\u003e\n\u003cp\u003eAustenitic 304 alloy provides solid corrosion resistance in humid, mildly acidic, and washdown environments without the brittleness of hardened carbon steel alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eWide Diameter Range: 0.4 mm – 2.8 mm\u003c\/strong\u003e\n\u003cp\u003eNine discrete sizes from 0.4 mm to 2.8 mm (0.016\"–0.110\") cover miniature instrument bearings, small valve seats, and compact robotic joints in a single product family.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eTight Sphericity Tolerance\u003c\/strong\u003e\n\u003cp\u003eManufactured to close roundness tolerances, these balls seat consistently in races and retainers, reducing vibration and extending service life in repetitive-motion assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✨\u003c\/span\u003e \u003cstrong\u003eBright, Smooth Surface Finish\u003c\/strong\u003e\n\u003cp\u003eThe polished surface minimizes rolling friction and reduces the risk of scoring contact surfaces in lightly loaded applications such as instrument pivots and stylus guides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eBulk Pack Options: 500 \/ 1,000 \/ 2,000 pcs\u003c\/strong\u003e\n\u003cp\u003eOrder the quantity that matches your production run or repair stock. Larger packs reduce per-unit cost for workshops and small-batch manufacturers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e \u003cstrong\u003eVersatile Rolling Element Applications\u003c\/strong\u003e\n\u003cp\u003eSuitable as replacement balls in miniature deep-groove bearings, thrust washers, ball screws, and custom retainer assemblies across mechanical, optical, and fluid-control devices.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003e📐 Technical Specifications — Stainless Steel Precision Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e304 Stainless Steel (austenitic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e0.4 mm – 2.8 mm (0.016\" – 0.110\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e0.4, 0.5, 0.6, 1.2, 1.58, 1.6, 1.8, 1.9, 2.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eBright polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eSuitable for humid and mildly corrosive environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e500 pcs \/ 1,000 pcs \/ 2,000 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication Type\u003c\/th\u003e\n\u003ctd\u003eLoose rolling elements (not pre-assembled bearings)\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\u003ctr\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade \/ Tolerance Class\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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 ball diameter for my bearing assembly?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the ball diameter to the race groove radius of your bearing housing — the ball should contact the groove at roughly 52–55% of the ball diameter for standard deep-groove geometry. If you have the original bearing part number, cross-reference the ball complement size in the manufacturer's datasheet. When in doubt, measure the worn balls with a micrometer and order the same nominal size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls strong enough for load-bearing mechanical applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel has a lower hardness than bearing-grade 440C stainless or chrome steel (52100), so these balls are best suited to light-load, low-impact applications such as instrument pivots, valve seats, and small retainer assemblies. For heavy radial or axial loads, consider hardened steel or ceramic alternatives and verify the dynamic load rating against your application requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these balls rust or corrode in wet or outdoor environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel offers solid resistance to atmospheric moisture, fresh water, and mild chemical exposure. It is not fully immune to chloride-rich environments (such as saltwater or bleach solutions), which can cause pitting over time. For marine or aggressive chemical applications, 316 stainless steel balls would provide better corrosion resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these as replacement balls in a standard deep-groove ball bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes, provided the diameter matches the original ball complement size and the material grade is acceptable for your load and speed conditions. Measure the existing balls with a micrometer, confirm the count per bearing, and order accordingly. Note that 304 stainless is softer than the 440C or 52100 steel used in most precision bearings, so service life under heavy load may differ.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the various diameter sizes listed?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach size is a distinct nominal diameter: 0.4 mm, 0.5 mm, 0.6 mm, 1.2 mm, 1.58 mm, 1.6 mm, 1.8 mm, 1.9 mm, and 2.8 mm. These correspond to common miniature bearing ball complements and instrument pivot sizes. Select the size that matches your housing specification exactly — even a 0.1 mm difference will affect fit and rolling performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow should I store unused balls to prevent surface degradation?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStore in a sealed container away from moisture, dust, and direct contact with dissimilar metals to avoid galvanic corrosion. A light coating of clean machine oil or VCI (vapor corrosion inhibitor) paper is recommended for long-term storage. Avoid storing near chloride-containing cleaning agents or in environments with high humidity fluctuations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo you offer custom quantities or sizes outside the listed options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe listed sizes and pack quantities (500 \/ 1,000 \/ 2,000 pcs) cover the most common miniature ball bearing applications. If you need a diameter or quantity not shown, contact us through the store's contact page and we will advise on availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Size(mm) and Quantity(PCS) above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"0.5mm \/ 500","offer_id":52410209763602,"sku":"GLFBLLSGLBZSJ096601x500","price":5.37,"currency_code":"USD","in_stock":true},{"title":"0.5mm \/ 1000","offer_id":52410209796370,"sku":"GLFBLLSGLBZSJ096601x1000","price":8.96,"currency_code":"USD","in_stock":true},{"title":"0.5mm \/ 2000","offer_id":52410209829138,"sku":"GLFBLLSGLBZSJ096601x2000","price":16.16,"currency_code":"USD","in_stock":true},{"title":"0.6mm \/ 500","offer_id":52410209861906,"sku":"GLFBLLSGLBZSJ096602x500","price":5.37,"currency_code":"USD","in_stock":true},{"title":"0.6mm \/ 1000","offer_id":52410209894674,"sku":"GLFBLLSGLBZSJ096602x1000","price":8.96,"currency_code":"USD","in_stock":true},{"title":"0.6mm \/ 2000","offer_id":52410209927442,"sku":"GLFBLLSGLBZSJ096602x2000","price":16.16,"currency_code":"USD","in_stock":true},{"title":"0.4mm \/ 500","offer_id":52410209960210,"sku":"GLFBLLSJSSYX0871x500","price":5.37,"currency_code":"USD","in_stock":true},{"title":"0.4mm \/ 1000","offer_id":52410209992978,"sku":"GLFBLLSJSSYX0871x1000","price":8.96,"currency_code":"USD","in_stock":true},{"title":"0.4mm \/ 2000","offer_id":52410210025746,"sku":"GLFBLLSJSSYX0871x2000","price":16.16,"currency_code":"USD","in_stock":true},{"title":"1.2mm \/ 500","offer_id":52410210058514,"sku":"GLFBLLSJSSYX0872x500","price":4.65,"currency_code":"USD","in_stock":true},{"title":"1.2mm \/ 1000","offer_id":52410210091282,"sku":"GLFBLLSJSSYX0872x1000","price":7.52,"currency_code":"USD","in_stock":true},{"title":"1.2mm \/ 2000","offer_id":52410210124050,"sku":"GLFBLLSJSSYX0872x2000","price":13.29,"currency_code":"USD","in_stock":true},{"title":"1.58mm \/ 500","offer_id":52410210156818,"sku":"GLFBLLSJSSYX0873x500","price":4.65,"currency_code":"USD","in_stock":true},{"title":"1.58mm \/ 1000","offer_id":52410210189586,"sku":"GLFBLLSJSSYX0873x1000","price":7.52,"currency_code":"USD","in_stock":true},{"title":"1.58mm \/ 2000","offer_id":52410210222354,"sku":"GLFBLLSJSSYX0873x2000","price":13.61,"currency_code":"USD","in_stock":true},{"title":"1.6mm \/ 500","offer_id":52410210255122,"sku":"GLFBLLSJSSYX0874x500","price":4.65,"currency_code":"USD","in_stock":true},{"title":"1.6mm \/ 1000","offer_id":52410210287890,"sku":"GLFBLLSJSSYX0874x1000","price":7.52,"currency_code":"USD","in_stock":true},{"title":"1.6mm \/ 2000","offer_id":52410210320658,"sku":"GLFBLLSJSSYX0874x2000","price":13.61,"currency_code":"USD","in_stock":true},{"title":"1.8mm \/ 500","offer_id":52410210353426,"sku":"GLFBLLSJSSYX0875x500","price":4.65,"currency_code":"USD","in_stock":true},{"title":"1.8mm \/ 1000","offer_id":52410210386194,"sku":"GLFBLLSJSSYX0875x1000","price":7.52,"currency_code":"USD","in_stock":true},{"title":"1.8mm \/ 2000","offer_id":52410210418962,"sku":"GLFBLLSJSSYX0875x2000","price":14.2,"currency_code":"USD","in_stock":true},{"title":"1.9mm \/ 500","offer_id":52410210451730,"sku":"GLFBLLSJSSYX0876x500","price":4.65,"currency_code":"USD","in_stock":true},{"title":"1.9mm \/ 1000","offer_id":52410210484498,"sku":"GLFBLLSJSSYX0876x1000","price":7.52,"currency_code":"USD","in_stock":true},{"title":"1.9mm \/ 2000","offer_id":52410210517266,"sku":"GLFBLLSJSSYX0876x2000","price":14.2,"currency_code":"USD","in_stock":true},{"title":"2.8mm \/ 500","offer_id":52410210550034,"sku":"GLFBLLSJSSYX0877x500","price":5.13,"currency_code":"USD","in_stock":true},{"title":"2.8mm \/ 1000","offer_id":52410210582802,"sku":"GLFBLLSJSSYX0877x1000","price":9.34,"currency_code":"USD","in_stock":true},{"title":"2.8mm \/ 2000","offer_id":52410210615570,"sku":"GLFBLLSJSSYX0877x2000","price":17.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of5_787bb28e-3214-4ac8-b727-7a667e9b4d92.jpg?v=1782388915","url":"https:\/\/homediyer.com\/products\/304-stainless-steel-high-precision-steel-ball-bearings-dia-0-5mm-2-8mm","provider":"HomeDIYer","version":"1.0","type":"link"}