{"product_id":"304-stainless-steel-ball-bearings","title":"Durable 304 Stainless Steel Ball Bearings 1.5 2.5 3.5 4.5 5.556 6.5 8.5 9.525mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003e304 Stainless Steel Ball Bearings — Corrosion-Resistant Precision for Every Application\u003c\/h2\u003e\n\u003cp\u003eWhen a seized bearing or corroded steel ball derails your project mid-build, the cost isn't just the part — it's the downtime. Whether you're a machinist sourcing replacement balls for a worn bearing assembly, a DIYer building a custom jig, or a hobbyist working on RC models and robotics, you need a ball that holds its geometry and resists rust without constant maintenance.\u003c\/p\u003e\n\u003cp\u003eThese 304 stainless steel ball bearings are available in a wide range of diameters from 1mm (0.039\") to 30mm (1.181\"), covering both metric and inch-equivalent sizes including 2.381mm (3\/32\"), 3.175mm (1\/8\"), 3.969mm (5\/32\"), 4.763mm (3\/16\"), 6.35mm (1\/4\"), 7.144mm (9\/32\"), 9.525mm (3\/8\"), 22.225mm (7\/8\"), and 25.4mm (1\"). Sold in convenient 1pcs or 500pcs packs to match your project scale.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include replacement balls in linear bearings and ball screws, load-distributing elements in custom fixtures and jigs, rolling media in tumbling and finishing equipment, and precision spacers in 3D printer extruder assemblies. The 304 grade alloy makes these stainless steel ball bearings for machinery a reliable choice wherever moisture, mild chemicals, or outdoor exposure is a factor.\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 Suitable for standard bearing housings, ball screw assemblies, and custom fixtures requiring metric or inch-equivalent ball diameters. Verify your housing bore and tolerance class before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These 304 Stainless Steel Ball Bearings\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003e304 Stainless Steel Construction\u003c\/strong\u003e — Grade 304 alloy provides solid resistance to oxidation, mild acids, and moisture, keeping balls round and smooth through extended service cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e — 37 size options from 1mm to 30mm, including fractional inch equivalents (1\/8\", 1\/4\", 3\/8\", 1\"), so you can source metric and imperial sizes from a single listing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eConsistent Spherical Geometry\u003c\/strong\u003e — Manufactured to maintain roundness tolerances suitable for bearing replacement, load distribution, and precision assembly tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Choose 1pcs for prototyping or single repairs, or 500pcs for production runs, restocking, or bulk workshop supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eBroad Application Fit\u003c\/strong\u003e — Used in linear guides, ball screws, drawer slides, caster wheels, tumbling barrels, and hobbyist robotics — wherever a smooth, hard rolling element is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eLow Maintenance Surface\u003c\/strong\u003e — The passive oxide layer on 304 stainless reduces the need for frequent lubrication in low-load, low-speed applications compared to carbon steel alternatives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Stainless Steel Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e1mm – 30mm (see variant options for full size list)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInch Equivalents Available\u003c\/th\u003e\n\u003ctd\u003e3\/32\", 1\/8\", 5\/32\", 3\/16\", 1\/4\", 9\/32\", 3\/8\", 7\/8\", 1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSmooth, bright polished\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 \/ Alloy\u003c\/th\u003e\n\u003ctd\u003eAISI 304 (18-8 Stainless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Options\u003c\/th\u003e\n\u003ctd\u003e1pcs \/ 500pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShape\u003c\/th\u003e\n\u003ctd\u003eSpherical (full ball)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eSuitable for moisture, mild chemicals, and outdoor exposure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eBearing assemblies, ball screws, jigs, tumbling, robotics\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 diameter for my bearing housing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the bore of your bearing housing or the seat diameter in your assembly using a micrometer or caliper. The ball diameter should match the specified ball size in your bearing's datasheet. For replacement applications, refer to the original bearing part number to confirm the ball diameter. If you're designing a custom fixture, allow for appropriate clearance based on your tolerance class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these balls suitable for high-load or high-speed bearing applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese 304 stainless steel balls are well-suited for light-to-medium load and low-to-moderate speed applications such as drawer slides, caster wheels, jigs, and hobbyist machinery. For heavy industrial loads, high-RPM spindles, or precision Grade 10 and below applications, consult a bearing specialist and verify the required hardness and grade specification against your load and speed requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill 304 stainless steel balls rust or corrode?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel forms a passive chromium oxide layer that resists rust in most everyday environments including moisture, mild acids, and outdoor exposure. However, it is not fully immune — prolonged exposure to chlorides (such as saltwater or bleach) can cause surface pitting over time. For marine or highly corrosive environments, 316 stainless steel is generally recommended instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre the inch-equivalent sizes truly interchangeable with imperial ball bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Sizes such as 3.175mm (1\/8\"), 6.35mm (1\/4\"), 9.525mm (3\/8\"), and 25.4mm (1\") are the metric expressions of standard fractional inch ball diameters and are dimensionally equivalent. They will fit housings and assemblies designed for those imperial sizes. Always verify with a micrometer before installation in precision assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these balls in food-contact or medical equipment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel is widely used in food processing equipment and is generally considered food-safe for incidental contact. However, if your application requires certified food-grade or medical-grade components, you should request material certifications and verify compliance with the relevant standards (e.g., FDA, EU 10\/2011, ISO 13485) for your specific use case. Contact us to confirm before ordering for regulated applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between ordering 1pcs vs 500pcs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 1pcs option is ideal for prototyping, single-unit repairs, or testing a size before committing to a larger quantity. The 500pcs pack is designed for production runs, workshop restocking, or bulk assembly work where you need a consistent supply of the same diameter. Both options ship the same ball specification — only the quantity differs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow should I store stainless steel ball bearings to maintain their condition?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStore balls in a dry, covered container away from direct moisture and corrosive chemicals. Avoid mixing different diameters in the same container to prevent surface scratching. For long-term storage, a light coating of machine oil or VCI (vapor corrosion inhibitor) packaging can help preserve the surface finish, especially in humid environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Diameter and Packing Qty above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"1mm \/ 500pcs","offer_id":52409664831762,"sku":"LFL2024GANGZHU3826x500","price":10.08,"currency_code":"USD","in_stock":true},{"title":"1.5mm \/ 500pcs","offer_id":52409664864530,"sku":"LFL2024GANGZHU3827x500","price":10.65,"currency_code":"USD","in_stock":true},{"title":"2mm \/ 500pcs","offer_id":52409664897298,"sku":"LFL2024GANGZHU3828x500","price":11.34,"currency_code":"USD","in_stock":true},{"title":"2.381mm \/ 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