{"product_id":"chrome-steel-ball-bearings-grade-200","title":"Ball Bearings chrome steel Grade 200 1.5mm 2.5mm 3.5mm 4.5mm 5.5mm 8.5mm 9.5mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eChrome Steel Ball Bearings Grade 200 — Precision Fit for Every DIY Build\u003c\/h2\u003e\n\u003cp\u003eWhen a loose or undersized ball bearing causes wobble, noise, or premature wear in your project, the fix starts with choosing the right grade. Hobbyists, engineers, and makers who demand repeatable accuracy rely on chrome steel Grade 200 ball bearings to keep their assemblies running true — whether they're building from scratch or replacing worn components.\u003c\/p\u003e\n\u003cp\u003eThese chrome steel ball bearings are manufactured to ABEC Grade 200 tolerances, offering a spherical surface finish that minimizes friction and maximizes load distribution. Available in diameters ranging from 1mm (0.039 in) to 10mm (0.394 in), including fractional inch equivalents such as 3\/32\" (2.381mm), 1\/8\" (3.175mm), 5\/32\" (3.969mm), 3\/16\" (4.763mm), 7\/32\" (5.556mm), and 1\/4\" (6.35mm), this range covers both metric and imperial applications in a single product line.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include DIY linear motion systems and drawer slides, RC car and drone drivetrain assemblies requiring chrome steel ball bearings for smooth rotation, and precision instrument repair where tight-tolerance replacement balls are essential for restoring original performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e Compatible with standard bearing races, ball screw assemblies, V-slot linear rails, and open-frame bearing housings accepting 1–10mm diameter balls.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Chrome Steel Grade 200 Ball Bearings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eGrade 200 Tolerance\u003c\/strong\u003e\n\u003cp\u003eManufactured to Grade 200 sphericity standards, delivering consistent roundness and surface finish for low-friction, low-vibration operation in precision assemblies.\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\u003eMade from through-hardened chrome steel (equivalent to 52100 bearing steel), providing excellent hardness, wear resistance, and fatigue life under cyclic loading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eWide Diameter Range\u003c\/strong\u003e\n\u003cp\u003eAvailable from 1mm to 10mm including fractional inch sizes (3\/32\", 1\/8\", 5\/32\", 3\/16\", 1\/4\"), covering both metric and imperial bearing races without adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eBulk Pack Options\u003c\/strong\u003e\n\u003cp\u003eChoose 100-piece or 200-piece packs to stock your workshop, reduce per-unit cost, and always have the right size on hand for repairs and new builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCorrosion-Resistant Finish\u003c\/strong\u003e\n\u003cp\u003eChrome steel's inherent oxide layer provides moderate corrosion resistance suitable for indoor mechanical environments, dry assemblies, and lightly lubricated applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003eDrop-In Replacement Compatibility\u003c\/strong\u003e\n\u003cp\u003eSized to match standard bearing races and housings — ideal for replacing worn balls in existing bearings, linear guides, and ball-end linkages without machining.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Chrome Steel Ball Bearings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eChrome Steel (52100 equivalent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGrade\u003c\/th\u003e\n\u003ctd\u003eGrade 200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiameter Range\u003c\/th\u003e\n\u003ctd\u003e1mm – 10mm (0.039\" – 0.394\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e1, 1.5, 2, 2.381, 2.5, 2.778, 3, 3.175, 3.5, 3.969, 4, 4.5, 4.763, 5, 5.5, 6, 6.35, 7, 7.144, 8, 8.5, 9, 9.5, 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e100 pcs \/ 200 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\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\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eModerate (indoor \/ dry environments)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eBearings, linear motion, RC vehicles, instruments, DIY machinery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per pack)\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 diameter for my bearing race?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the inner diameter of your bearing race or housing with a caliper. The ball diameter should match the race groove radius — typically the ball OD equals the race ID divided by the number of balls times a fit factor. If you are replacing existing balls, measure a removed ball directly. This listing covers 1mm through 10mm including common fractional inch equivalents (3\/32\", 1\/8\", 5\/32\", 3\/16\", 1\/4\"), so you can match both metric and imperial races.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does Grade 200 mean for ball bearings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGrade 200 refers to the ABEC\/ISO sphericity tolerance class. A Grade 200 ball has a maximum deviation from a perfect sphere of 200 millionths of an inch (approximately 5 micrometers). This is suitable for general-purpose and light-precision applications such as DIY machinery, RC vehicles, and instrument repair where tighter grades (Grade 25 or Grade 10) are not required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these ball bearings strong enough for load-bearing applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChrome steel (52100 equivalent) is through-hardened to typically 60–67 HRC, giving it excellent compressive strength and fatigue resistance under cyclic radial and axial loads. For light-to-medium DIY loads — drawer slides, small motors, RC drivetrains, and hand tools — Grade 200 chrome steel balls are well suited. For heavy industrial or high-speed spindle applications, consult a bearing engineer for a higher-grade specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these rust if used in a damp environment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChrome steel provides moderate corrosion resistance through its natural oxide layer, but it is not stainless steel. For dry indoor environments and lightly lubricated assemblies, chrome steel performs reliably. If your application involves water exposure, high humidity, or chemical contact, consider stainless steel ball bearings instead. Applying a light machine oil or grease will significantly extend service life in borderline conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these to replace balls in an existing sealed bearing?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — if you can disassemble the bearing and access the ball complement, these Grade 200 chrome steel balls can serve as direct replacements provided the diameter matches exactly. Use a caliper to measure the original balls before ordering. Replace the entire ball complement at once rather than mixing old and new balls, as uneven wear between balls increases noise and reduces bearing life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between 100-piece and 200-piece packs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBoth packs contain the same Grade 200 chrome steel balls — the only difference is quantity. The 200-piece pack offers a lower per-unit cost and is ideal if you are stocking a workshop, running a production batch, or working on a project that requires a large ball complement. The 100-piece pack suits single-project repairs or initial testing of a new size before committing to a larger quantity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre fractional inch sizes like 1\/4\" or 3\/16\" available?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. This listing includes several fractional inch equivalents alongside metric sizes: 2.381mm (3\/32\"), 3.175mm (1\/8\"), 3.969mm (5\/32\"), 4.763mm (3\/16\"), 6.35mm (1\/4\"), and 7.144mm (9\/32\"). These cover the most common imperial bearing sizes used in North American DIY and hobby applications, so you can source metric and imperial sizes from a single listing.\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 Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"1mm \/ 100","offer_id":52410569851154,"sku":"GLFBLFF2024GANGZHU3143x100","price":3.93,"currency_code":"USD","in_stock":true},{"title":"1.5mm \/ 100","offer_id":52410569883922,"sku":"GLFBLFF2024GANGZHU3144x100","price":3.93,"currency_code":"USD","in_stock":true},{"title":"2mm \/ 100","offer_id":52410569916690,"sku":"GLFBLFF2024GANGZHU3145x100","price":4.2,"currency_code":"USD","in_stock":true},{"title":"2.381mm \/ 100","offer_id":52410569949458,"sku":"GLFBLFF2024GANGZHU3146x100","price":4.2,"currency_code":"USD","in_stock":true},{"title":"2.5mm 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