... journal bearing)Aircooled bearing typeapplicationPetroleum and gas, water well, mining and tectonic industries, oil field, construction, geothermal, ... impact resistance.Themal stability-the resist temperature reaches700°C,which makes reliable quality and better performance when ... thickness, chamfers, and sizes.Hejian Wanda Petroleum Machinery Co.,Ltd. Supplies all kinds of PDC coring and non-coring ...