Rollers are the cheapest item on a mining conveyor and the fastest way to stop it. This article sets out twelve things to verify before placing an order with a mining conveyor rollers manufacturer, from impact roller duty at the transfer point and seal choice for dust and washdown, through tube wall thickness, shaft tolerance, balance grade and grease specification, to the test documents, sample approval and spare-part continuity that decide whether the second order matches the first. Each check is tied to a number or a site consequence, so it can be put straight into an RFQ or an inspection plan.