{"product_id":"mbpucs","title":"Polyurethane (PU) Coated Steel Milling Balls (15-30 mm), 1 kg\/bag, MBPUCS","description":"\u003cp\u003ePolyurethane (PU) Coated Steel Milling Balls—consisting of a heavy, high-density carbon steel or chrome steel inner core seamlessly encapsulated within a durable, abrasion-resistant outer jacket of polyurethane—represent a premier hybrid grinding media. By combining the high kinetic mass of steel with the non-marking, shock-absorbing, and contamination-free properties of an elastic polymer, these hybrid balls provide a crucial middle ground for specialized processing. They deliver high-energy impacts while completely shielding the sample from trace transition metal (Fe, Cr, Ni) contamination.\u003c\/p\u003e\n\u003cp\u003eThe critical advantages of PU coated steel milling balls are: (1) \u003cstrong\u003eHigh Mass with Zero Metal Contamination\u003c\/strong\u003e: Solid plastic milling balls (like pure nylon, HDPE, or PTFE) are incredibly light (~1.0–2.1 g\/cm3) and lack the raw physical weight to crush hard powders. PU-coated steel balls leverage the heavy steel core to crush tough materials efficiently, while the thick, seamless polyurethane skin ensures that zero metallic debris flakes or abrades into the batch. (2) \u003cstrong\u003eHigh Abrasion Resistance (Elastic Rebound)\u003c\/strong\u003e: Polyurethane is widely recognized for having superior abrasion and tear resistance among engineering polymers. When an impact occurs, the elastomeric PU jacket deforms slightly, distributing the kinetic stress and rebounding without peeling, chipping, or shedding the micro-fibers common to rigid plastics like nylon. (3) \u003cstrong\u003eNoise and Vibration Damping\u003c\/strong\u003e: High-energy planetary ball milling with solid steel or tungsten carbide media creates extreme decibel noise and puts immense structural stress on the mill's internal gears and bearings. The outer elastomer layer of PU-coated balls significantly dampens the acoustic output and acts as a built-in shock absorber for the machine's drive system\u003c\/p\u003e\n\u003ctable style=\"height: 260.775px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 47.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 47.6px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 47.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eMBPUCS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 47.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 47.6px;\"\u003e\u003cem\u003eBall Material\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 47.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003ePEEK coated steel\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 47.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 47.6px;\"\u003e\u003cem\u003eMilling Ball Sizes\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 47.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003e15-30 mm (\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eother sizes can be supplied upon request\u003c\/span\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 47.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 47.6px;\"\u003e\u003cem\u003eSpherical Resolution\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 47.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003e±5 um\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 47.6px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 47.6px;\"\u003e\u003cem\u003eDensity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 47.6px;\"\u003e\n\u003cul\u003e\n\u003cli\u003e4.0 g\/cm3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 22.775px;\"\u003e\n\u003ctd style=\"width: 17.9856%; height: 22.775px;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 81.6547%; height: 22.775px;\"\u003e\n\u003cul\u003e\n\u003cli\u003e1 kg\/bag\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"MQKJ","offers":[{"title":"15 mm","offer_id":47974764216550,"sku":"MBPUCSD15","price":139.0,"currency_code":"USD","in_stock":true},{"title":"20 mm","offer_id":47974764249318,"sku":"MBPUCSD20","price":129.0,"currency_code":"USD","in_stock":true},{"title":"30 mm","offer_id":47974764282086,"sku":"MBPUCSD30","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/MBPUCS_main.jpg?v=1783911401","url":"https:\/\/echemsupplies.com\/products\/mbpucs","provider":"EChem Supplies","version":"1.0","type":"link"}