... Hardness: HRC50 Degree: 45 & 50 Tungsten Carbide Drill Bits1. Carbide tips for tunnel machine toolingsApplications: tunnel ... cutting tools 3. carbide for miningApplications: mining inserts, drill bits. hammers, carbide snow plow insert CHUCK MODELCOLLECT ... 6,6.35ER1617MM3,3.175,4,5,6,6.35,8,10ER2021MM3.175,4,5,6,6.35,8,10,12,12.7ER2526MM3.175,4,5,6,6 ... 12,12.7,14,16ER3233MM3.175,4,5,6,6.35,8,10,12,12.7,14, ...