Alloy Drill Bit Rock Mining Drilling Machine Bits 90mm 115mm

Alloy Drill Bit Rock Mining Drilling Machine Bits 90mm 115mm. Diverse DTH Bit Sizes: Available in 2.5 to 8 feet with diameters from 76mm to 350mm for various rock mining tasks. High-Quality Cobalt Steel: Manufactured from premium cobalt steel alloys with strict 100% visual and function inspection. OEM and ODM Services: Full customization available from samples or designs with support from experienced R&D team. Expert R&D Leadership: Led by Dr. Zhao Mingchun with 25 years of experience in drilling tool design and material research. Flexible Minimum Order: Accepts orders as low as 1 piece or 1 complete set, including sample orders for quality testing. Fast Delivery Options: 5-10 days for in-stock items, 15-25 days generally, with peak season lead time within 15 workdays. Factory Visit Welcome: Customers are invited to visit the 5000 sqm plant in Linyi, Shandong for inspection and scheduling. Comprehensive After-Sales: Dedicated team ensures prompt resolution of complaints and provides tailored service support.