Mining loads are not gentle. A primary crusher shaft bearing sees impact spikes several times rated load; excavator bucket pins hammer and twist under full stall torque; vibrating screens shake their own frames apart over years. Add abrasive dust and high-pressure washdown water, and you have the most hostile lubrication environment in industry.<\/p>\n
Under steady load, a grease’s base oil maintains a hydrodynamic film on the raceway. Under shock load, that film is squeezed out in milliseconds, and metal contacts metal briefly – a phenomenon called boundary lubrication. The grease must contain extreme-pressure (EP) additives that react chemically with the steel surface at that contact instant, forming a sacrificial layer that prevents welding and scoring.<\/p>\n
Sulfur-phosphorus EP additives:<\/strong> The standard chemistry. Effective across a wide temperature window, works in most lithium EP grades. Our Black EP line carries a 4-ball weld load above 3,100 N (ASTM D2596).<\/p>\n Molybdenum disulfide (MoS2):<\/strong> A solid lubricant suspended in the grease – typically 3% in our moly grades. MoS2 plates onto the metal surface and shears easily, providing lubrication exactly when the oil film fails. Ideal for sliding contacts: bucket pins, bushings, fifth wheels. Note: avoid MoS2 in rolling bearings running wet – it can abrade with the water present.<\/p>\n Calcium sulfonate:<\/strong> Naturally high EP capacity without additives, plus the best water resistance in the industry. The premium answer for wet, shock-loaded positions.<\/p>\n Mining maintenance teams under-lubricate far more often than they over-lubricate – the schedule exists but the shut-down windows do not. Automating what you can (single-point lubricators on remote crusher bearings) and making pin grease-ups part of the shift routine, not the weekly routine, moves bearing life dramatically.<\/p>\n We export to mining operations in 20+ countries and can share reference setups for your equipment type. Black EP and moly samples ship free for bench and field trials.<\/p>\n","protected":false},"excerpt":{"rendered":" Black EP and moly grades for dust, water and impact loads.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-11","post","type-post","status-publish","format-standard","hentry","category-applications"],"_links":{"self":[{"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/posts\/11","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/comments?post=11"}],"version-history":[{"count":0,"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/posts\/11\/revisions"}],"wp:attachment":[{"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/media?parent=11"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/categories?post=11"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/llfgrease.com\/news\/wp-json\/wp\/v2\/tags?post=11"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Matching grade to position<\/h2>\n
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\n Position<\/th>\n Recommendation<\/th>\n Why<\/th>\n<\/tr>\n \n Crusher main shaft<\/td>\n Lithium complex EP, NLGI 2<\/td>\n Shock + moderate heat<\/td>\n<\/tr>\n \n Excavator bucket pins<\/td>\n Lithium EP + 3% MoS2, NLGI 2<\/td>\n Sliding, shock, slow<\/td>\n<\/tr>\n \n Vibrating screen bearings<\/td>\n Polyurea or lithium complex, NLGI 3<\/td>\n Vibration flings soft grease<\/td>\n<\/tr>\n \n Wet slurry pumps<\/td>\n Calcium sulfonate complex, NLGI 2<\/td>\n Water + impact<\/td>\n<\/tr>\n \n Conveyor idlers<\/td>\n Lithium EP, NLGI 2, low cost<\/td>\n High quantity, moderate duty<\/td>\n<\/tr>\n<\/table>\n Relubrication is the other half of survival<\/h2>\n