{"product_id":"steel-grinding-balls","title":"Forged \u0026 Rolled Steel Grinding Balls","description":"\u003ch2\u003eForged \u0026amp; Rolled Steel Grinding Balls\u003c\/h2\u003e\n\n\u003cp\u003eThrough-hardened carbon and low-alloy steel grinding balls for ball mills and\nrod mills, from \u003cstrong\u003e12 mm to 152 mm (1\/2 in to 6 in)\u003c\/strong\u003e. Supplied to ore,\ncement, lime, aggregate and coal-pulverising duties.\u003c\/p\u003e\n\n\u003ch3\u003eTwo processes, one ladder\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRolled balls, 12–50 mm (1\/2–2 in).\u003c\/strong\u003e Rolled direct from bar with\nin-line heat treatment, giving continuous grain flow and uniform hardness through\nthe section — a genuine advantage over the uneven effect of hammer forging.\nAvailable in two carbon ranges: 0.7\/0.9% C finishing at \u003cstrong\u003e600 BHN\u003c\/strong\u003e,\nand 0.6\/1% C at a \u003cstrong\u003e350 BHN minimum\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eForged balls, 63 mm (2-1\/2 in) and over.\u003c\/strong\u003e Where grinding is by\nimpact rather than abrasion, forging from billet keeps the larger sizes\neconomical without giving up toughness.\u003c\/p\u003e\n\n\u003ch3\u003eSizes, weights and charge data\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003eWeight each\u003c\/th\u003e\n\u003cth\u003ePieces per tonne\u003c\/th\u003e\n\u003cth\u003eSurface area each\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e12 mm\u003c\/td\u003e\n\u003ctd\u003e7 g (0.016 lb)\u003c\/td\u003e\n\u003ctd\u003e140,795\u003c\/td\u003e\n\u003ctd\u003e4.5 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003ctd\u003e14 g (0.031 lb)\u003c\/td\u003e\n\u003ctd\u003e72,087\u003c\/td\u003e\n\u003ctd\u003e7.1 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e17 mm\u003c\/td\u003e\n\u003ctd\u003e20 g (0.045 lb)\u003c\/td\u003e\n\u003ctd\u003e49,520\u003c\/td\u003e\n\u003ctd\u003e9.1 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003ctd\u003e33 g (0.073 lb)\u003c\/td\u003e\n\u003ctd\u003e30,412\u003c\/td\u003e\n\u003ctd\u003e12.6 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e25 mm (1 in)\u003c\/td\u003e\n\u003ctd\u003e64 g (0.142 lb)\u003c\/td\u003e\n\u003ctd\u003e15,571\u003c\/td\u003e\n\u003ctd\u003e19.6 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003ctd\u003e111 g (0.245 lb)\u003c\/td\u003e\n\u003ctd\u003e9,011\u003c\/td\u003e\n\u003ctd\u003e28.3 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e35 mm\u003c\/td\u003e\n\u003ctd\u003e176 g (0.388 lb)\u003c\/td\u003e\n\u003ctd\u003e5,674\u003c\/td\u003e\n\u003ctd\u003e38.5 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003ctd\u003e263 g (0.58 lb)\u003c\/td\u003e\n\u003ctd\u003e3,801\u003c\/td\u003e\n\u003ctd\u003e50.3 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e45 mm\u003c\/td\u003e\n\u003ctd\u003e375 g (0.826 lb)\u003c\/td\u003e\n\u003ctd\u003e2,670\u003c\/td\u003e\n\u003ctd\u003e63.6 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e50 mm (2 in)\u003c\/td\u003e\n\u003ctd\u003e514 g (1.13 lb)\u003c\/td\u003e\n\u003ctd\u003e1,946\u003c\/td\u003e\n\u003ctd\u003e78.5 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e63.5 mm (2-1\/2 in)\u003c\/td\u003e\n\u003ctd\u003e1.05 kg (2.32 lb)\u003c\/td\u003e\n\u003ctd\u003e950\u003c\/td\u003e\n\u003ctd\u003e126.7 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e76.2 mm (3 in)\u003c\/td\u003e\n\u003ctd\u003e1.82 kg (4.01 lb)\u003c\/td\u003e\n\u003ctd\u003e550\u003c\/td\u003e\n\u003ctd\u003e182.4 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e88.9 mm (3-1\/2 in)\u003c\/td\u003e\n\u003ctd\u003e2.89 kg (6.37 lb)\u003c\/td\u003e\n\u003ctd\u003e346\u003c\/td\u003e\n\u003ctd\u003e248.3 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e101.6 mm (4 in)\u003c\/td\u003e\n\u003ctd\u003e4.31 kg (9.5 lb)\u003c\/td\u003e\n\u003ctd\u003e232\u003c\/td\u003e\n\u003ctd\u003e324.3 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e114.3 mm (4-1\/2 in)\u003c\/td\u003e\n\u003ctd\u003e6.14 kg (13.53 lb)\u003c\/td\u003e\n\u003ctd\u003e163\u003c\/td\u003e\n\u003ctd\u003e410.4 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e127 mm (5 in)\u003c\/td\u003e\n\u003ctd\u003e8.42 kg (18.56 lb)\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e506.7 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e139.7 mm (5-1\/2 in)\u003c\/td\u003e\n\u003ctd\u003e11.21 kg (24.71 lb)\u003c\/td\u003e\n\u003ctd\u003e89\u003c\/td\u003e\n\u003ctd\u003e613.1 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e152.4 mm (6 in)\u003c\/td\u003e\n\u003ctd\u003e14.55 kg (32.07 lb)\u003c\/td\u003e\n\u003ctd\u003e69\u003c\/td\u003e\n\u003ctd\u003e729.7 cm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eFigures are calculated from nominal dimensions at the stated density and agree with the published mill tables to within rounding. They size a mill charge; they are not a certificate. Hardness is verified per ISO 6508 (Rockwell C) or ISO 6506 (Brinell) on request.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSelecting a size\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLarger balls grind by impact and suit coarse feed and harder ores.\u003c\/li\u003e\n  \u003cli\u003eSmaller balls present far more surface per tonne of charge — a 12 mm ball\n      gives roughly 160 times the pieces per tonne of a 152 mm ball — and grind\n      by abrasion, which is what fine product needs.\u003c\/li\u003e\n  \u003cli\u003eMost mills run a graded charge rather than a single size. Tell us the mill\n      diameter, feed size and target product and we will recommend the ladder.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAlso available\u003c\/h3\u003e\n\u003cp\u003eHigh chrome cast balls where wear life matters more than first cost, and\ncylpebs, slugoids or helipebs for fine grinding. See the\n\u003ca href=\"\/pages\/grinding-media\"\u003egrinding media guide\u003c\/a\u003e for the full comparison.\u003c\/p\u003e","brand":"Dibblee","offers":[{"title":"12 mm","offer_id":50199311089941,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"15 mm","offer_id":50199311122709,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"17 mm","offer_id":50199311155477,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"20 mm","offer_id":50199311188245,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"25 mm (1 in)","offer_id":50199311221013,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"30 mm","offer_id":50199311253781,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"35 mm","offer_id":50199311286549,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"40 mm","offer_id":50199311319317,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"45 mm","offer_id":50199311352085,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"50 mm (2 in)","offer_id":50199311384853,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"63.5 mm (2-1\/2 in)","offer_id":50199311417621,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"76.2 mm (3 in)","offer_id":50199311450389,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"88.9 mm (3-1\/2 in)","offer_id":50199311483157,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"101.6 mm (4 in)","offer_id":50199311515925,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"114.3 mm (4-1\/2 in)","offer_id":50199311548693,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"127 mm (5 in)","offer_id":50199311581461,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"139.7 mm (5-1\/2 in)","offer_id":50199311614229,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true},{"title":"152.4 mm (6 in)","offer_id":50199311646997,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/4160\/7445\/files\/steel-balls-and-media-group.jpg?v=1790104028","url":"https:\/\/www.kentershackle.com\/products\/steel-grinding-balls","provider":"Kenter Shackles","version":"1.0","type":"link"}