Rapicut Carbides Limited manufactures Bucket Wheel Excavation Inserts. Rapicut Carbides Limited is an ISO 9001:2000 certified company. Bucket Wheel Excavation Inserts is a special technique used to mine brown coal or lignite from open cast mines. The wheel of excavator is provided with buckets which have sharp teeth to rip the soil and excavate the sediment. Bucket Wheel Excavation Inserts has another grade which is highly wear resistant and tough enough to withstand any impact loading.