Search Results We have found 2 items matching your search query. Close Sort By: TitleDatePopularityFeaturedNearestPrice List Grid Map Continuous Miner Extractor Continuous Miner Continuous Miner Extractor. Used to extract Continuous Miner. REQUEST South Africa JOY 12HM21 Gathering Head Gearbox MINING Gathering Head Gearcases for a JOY 12HM21 continuous miner. Part Number: 541026-58 Gearboxes have been rebuilt by JOY. We stock a large selection of new, used and reconditioned JOY underground mining REQUEST South Africa 1 Page 1 of 1