{"product_id":"koyo-6203-2rs-bearing-17x40x12mm","title":"KOYO 6203-2RS Bearing Deep Groove Ball Bearing Rubber Seal 17x40x12mm","description":"\u003cdiv style=\"max-width: 1200px; font-family: Verdana, Arial, Helvetica, sans-serif; margin: auto;\"\u003e\n\n\u003ch2 style=\"color: red; text-align: center;\"\u003e\u003cb\u003eKOYO 6203-2RS Bearing delivers smooth rotation, low friction, and dual rubber-sealed protection.\u003c\/b\u003e\u003c\/h2\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ch1 style=\"color: #2b76a4;\"\u003e\u003cb\u003eItem Specifics\u003c\/b\u003e\u003c\/h1\u003e\n\u003cdiv style=\"font-size: 1.5em;\"\u003e\n• \u003cb\u003eModel \/ Part Number:\u003c\/b\u003e 6203-2RS (6203 2RS \/ 6203-2RU \/ C3 Radial Clearance)\u003cbr\u003e\n• \u003cb\u003eBearing Type:\u003c\/b\u003e Single Row Deep Groove Radial Ball Bearing\u003cbr\u003e\n• \u003cb\u003eSeal Type:\u003c\/b\u003e 2RS Contact Sealed Both Sides with Synthetic Rubber\u003cbr\u003e\n• \u003cb\u003eSize:\u003c\/b\u003e 17 mm Bore x 40 mm Outer Diameter x 12 mm Width (17x40x12 mm)\u003cbr\u003e\n• \u003cb\u003eMinimum Chamfer Dimension:\u003c\/b\u003e 0.6 mm\u003cbr\u003e\n• \u003cb\u003eDynamic Load Rating (Cr):\u003c\/b\u003e 12.0 kN\u003cbr\u003e\n• \u003cb\u003eStatic Load Rating (Cor):\u003c\/b\u003e 4.80 kN\u003cbr\u003e\n• \u003cb\u003eFatigue Load Limit (Cu):\u003c\/b\u003e 0.370 kN\u003cbr\u003e\n• \u003cb\u003eLimiting Speed:\u003c\/b\u003e 12,000 RPM (Grease Lubrication)\u003cbr\u003e\n• \u003cb\u003eLubrication:\u003c\/b\u003e Factory Pre-Lubricated with High-Performance Grease\u003cbr\u003e\n• \u003cb\u003eReference Weight:\u003c\/b\u003e Approx. 65 g per bearing\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ch1 style=\"color: #2b76a4;\"\u003e\u003cb\u003eProduct Description\u003c\/b\u003e\u003c\/h1\u003e\n\u003cdiv style=\"font-size: 2em;\"\u003e\n\u003cp style=\"text-indent: 2em;\"\u003eThe authentic KOYO 6203-2RS Bearing is precision engineered by JTEKT Corporation to deliver smooth rotational stability, reduced mechanical friction, and continuous running endurance across demanding rotary equipment. Featuring an optimized single-row deep groove raceway geometry and precision-matched hardened steel balls, this bearing efficiently carries dynamic radial loads and bidirectional axial forces with minimal heat generation, quiet running performance, and low vibration output.\u003c\/p\u003e\n\u003cp style=\"text-indent: 2em;\"\u003eEquipped with dual contact rubber seals on both faces, this KOYO 6203-2RS Bearing ensures that internal factory-applied lubricating grease remains securely trapped inside while locking out abrasive dust, moisture, and road grit. Designed to standard metric dimensions of 17x40x12 mm, it serves as a seamless direct-fit replacement component for automotive alternators, motorcycle wheel hubs, electric motors, water pumps, power tools, and lawn equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ch1 style=\"color: #2b76a4;\"\u003e\u003cb\u003eKey Features and Benefits\u003c\/b\u003e\u003c\/h1\u003e\n\u003cdiv style=\"font-size: 1.5em;\"\u003e\n- \u003cb\u003eDual Contact Rubber Seals:\u003c\/b\u003e Blocks external contamination and locks in grease, giving each KOYO 6203-2RS Bearing extended service life.\u003cbr\u003e\n- \u003cb\u003ePre-Lubricated for Ready Use:\u003c\/b\u003e Packed at the factory with premium grease to allow immediate installation with zero initial maintenance.\u003cbr\u003e\n- \u003cb\u003eHigh-Speed Precision Performance:\u003c\/b\u003e Balanced rolling elements provide smooth, quiet running with grease-lubricated limiting speeds up to 12,000 RPM.\u003cbr\u003e\n- \u003cb\u003eRobust Load Capacity:\u003c\/b\u003e Rated for 12.0 kN dynamic load and 4.80 kN static load to withstand demanding operational mechanical stress.\u003cbr\u003e\n- \u003cb\u003eStandard Metric Dimensions:\u003c\/b\u003e Precision 17x40x12 mm fitment ensures broad compatibility across diverse automotive, industrial, and power tool machinery.\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ch1 style=\"color: #2b76a4;\"\u003e\u003cb\u003eConstruction and Material Components\u003c\/b\u003e\u003c\/h1\u003e\n\u003cdiv style=\"font-size: 1.5em;\"\u003e\n• \u003cb\u003eBearing Rings:\u003c\/b\u003e High-carbon chromium bearing steel (SUJ2 \/ 52100) inner and outer raceways provide outstanding contact fatigue endurance for the KOYO 6203-2RS Bearing.\u003cbr\u003e\n• \u003cb\u003eRolling Elements:\u003c\/b\u003e High-precision spherical steel balls deliver balanced load transmission, low friction, and minimal vibration.\u003cbr\u003e\n• \u003cb\u003eRetaining Cage:\u003c\/b\u003e Pressed sheet steel cage maintains uniform ball spacing and stable guidance during high-speed rotation.\u003cbr\u003e\n• \u003cb\u003eContact Seals:\u003c\/b\u003e Nitrile butadiene rubber (NBR) with integrated steel reinforcement creates a firm, protective barrier against external debris.\u003cbr\u003e\n• \u003cb\u003eInternal Lubricant:\u003c\/b\u003e Mineral-based lithium grease ensures continuous friction reduction and operational protection.\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ch1 style=\"color: #2b76a4;\"\u003e\u003cb\u003eHow to Use\u003c\/b\u003e\u003c\/h1\u003e\n\u003cdiv style=\"font-size: 1.5em;\"\u003e\n1. Confirm that the 6203-2RS designation and 17x40x12 mm dimensions match your equipment specifications.\u003cbr\u003e\n2. Clean and inspect the shaft journal and housing bore thoroughly to remove old grease, rust, or metal shavings.\u003cbr\u003e\n3. Keep the bearing sealed in its original protective packaging until the moment of installation.\u003cbr\u003e\n4. Press the bearing squarely into position using a proper mechanical bearing driver tool or arbor press.\u003cbr\u003e\n5. Apply mounting pressure strictly to the press-fit ring, never transferring force through the rolling balls or rubber seals.\u003cbr\u003e\n6. Check for smooth, unrestricted manual rotation before returning the assembled machine to active service.\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003ch1 style=\"color: #2b76a4;\"\u003e\u003cb\u003eMaterial Composition\u003c\/b\u003e\u003c\/h1\u003e\n\u003cdiv style=\"font-size: 1.5em;\"\u003e\n\u003cp style=\"text-indent: 2em;\"\u003eHigh-Carbon Chromium Bearing Steel (SUJ2 \/ AISI 52100), Precision Steel Balls, Pressed Sheet Steel, Nitrile Butadiene Rubber (NBR) with Steel Reinforcement, Mineral Oil-Based Lithium Grease\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e\n\n\u003c\/div\u003e","brand":"KOYO","offers":[{"title":"Default Title","offer_id":49737951412379,"sku":"KOYO-6203-2RS-2PK","price":4.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/0437\/4683\/files\/KOYO6203-2RSBearingBallDeepGroove_4.jpg?v=1791374005","url":"https:\/\/www.megaqualitystore.com\/products\/koyo-6203-2rs-bearing-17x40x12mm","provider":"Megaquality","version":"1.0","type":"link"}