... sealed journal bearing) HA (rubber sealed journal bearingaircooled bearing typeFormation or layer soft ,medium soft ,hard, medium hard, very hard ... casePayment termsT/T,L/C, Western unionDelivery termsBy sea or by airDelivery timeWithin 3 to 7 daysMarketCanada, USA, Middle east ,Africa, EuropeApplicationPetroleum ... Tricone Bit3 7/8 ,5 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 1/413 3/4, 17 1/2,22, 24 ...