{"product_id":"634zz-4x16-shielded-4x16x5-miniatu","title":"10-Pack 634ZZ Ball Bearing 4x16x5mm - Shielded - Miniature","description":"\u003cp\u003e\u003cstrong\u003e634ZZ Shielded Ball Bearings\u003c\/strong\u003e\u003cbr\u003e✔️ 4x16x5mm Chrome Steel - Pack of 10\u003c\/p\u003e\n\u003cp\u003eThis 10-pack of 634ZZ miniature ball bearings is made from high-strength chrome steel for long-lasting durability and high-speed performance. Each bearing features double metal shields to keep out dust and debris, and comes pre-lubricated with grease for smooth, maintenance-free rotation - ideal for hobby gearboxes, RC cars, and small mechanical systems.\u003c\/p\u003e\n\u003cp\u003e✅ Quantity: 10 Bearings\u003cbr\u003e✅ Size: 4mm inner x 16mm outer x 5mm width\u003cbr\u003e✅ Material: Chrome steel\u003cbr\u003e✅ Type: Deep groove ball bearings\u003cbr\u003e✅ Shield Type: Double metal shields (ZZ)\u003cbr\u003e✅ Lubrication: Pre-lubricated with grease\u003cbr\u003e✅ Dynamic Load Rating (Cr): 1,750 N\u003cbr\u003e✅ Static Load Rating (Cor): 670 N\u003cbr\u003e✅ Max Speed (Grease): 40,000 RPM\u003c\/p\u003e\n\u003cp\u003e✅ Common Equivalents:\u003cbr\u003eKOYO 634ZZ • NSK 634ZZ • NMB R-1640ZZ\u003c\/p\u003e\n\u003cp\u003e💡 \u003cem\u003eWhere are miniature ball bearings like 634ZZ commonly used?\u003c\/em\u003e\u003cbr\u003eMiniature bearings are perfect for compact, high-speed devices such as RC vehicles, 3D printers, precision tools, and small gear assemblies - where smooth, low-friction motion is critical.\u003c\/p\u003e\n\u003cp\u003eEngineered for fast, reliable motion in tight spaces - great for both performance and replacement use.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"VXB","offers":[{"title":"Default Title","offer_id":49309989273793,"sku":"kit842","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/0955\/3089\/files\/1_040824e1-a9cd-4a43-b13f-39a57092dca7.jpg?v=1748646725","url":"https:\/\/smallbearings.com\/zh\/products\/634zz-4x16-shielded-4x16x5-miniatu","provider":"Small Bearings","version":"1.0","type":"link"}