BS 4878:1973 PDF

What is BS 4878 - Large (vee-throated) haulage rope pulleys about?

BS 4878 is a British Standard on the specification for Large (vee-throated) haulage rope pulleys for mines and quarries. The major goal of BS 4878 is to provide assurance that the haulage rope pulleys will provide the essential risk reduction required to achieve hoist safety and hence optimize production efficiency and ensure the project's economic sustainability. BS 4878 specifies requirements for a range of haulage pulleys (with shafts) and pedestals designed to incorporate, appropriately, either rolling bearings or plain bearings. The pulleys covered by BS 4878 have been specifically designed for return wheel duty, i.e., where the lap of the rope on the pulley is 180°.