... roller 1.Dia 60-219,length 190-3400 2.Used in mining,cement,steel,harbor,etc 3.Standard:ISO,CEMA,DIN ... have professional engineers and all of them have rich experience in this field, we can design the goods independently. Standard: GB ... in the steel industry, harbor, coal industry, power industry, cement industry, etc2.Tube: Q2353.Shaft: 45# STEEL5.Bearing: Single & Double Row Deep Groove Ball ...