Wearproof Coal Mining Tools Conical Drill Bit Coal Mining
24/6/2016#0183;#32;Coal mining bit Description: Tough crushing conditions call for a tougher cutting tool. Tydrillbits supply carbide tipped coal cutter picks in 38mm, 51mm, and 52mm sizes. 1. They''re designed with large collars for extra block face protection. 2. Extreme wear and abrasion resistance are designed into the block with wide bodies that wear in line with the carbide tip.