Spanish Quarry : 7°8-Tooth Ball-Tooth Drill Bit Increases Drilling Efficiency by 50%, Reduces Consumable Costs by 40%

This customer is a medium-sized quarry located in Madrid, Spain, established in 2010, primarily engaged in granite and limestone mining. Their products mainly supply the local construction industry. In March 2025, the customer contacted us through our company's independent website. Their core need was to find a high-efficiency drill bit compatible with their existing lightweight drilling equipment to address the problems of slow drilling speed and rapid wear of their current products.

The customer previously used an 11° 6-tooth drill bit from a European brand, facing two major problems in granite mining:

• Low efficiency: Granite is a medium-hard rock formation (f=12-15), and the original drill bit's drilling speed was only 1.2 meters per minute, allowing them to drill only 80 meters per day, which could not meet project schedule requirements.
• High cost: The average lifespan of the drill bit was only 500 meters, requiring the purchase of more than 20 drill bits per month. Frequent drill bit replacement also resulted in more than 8 hours of equipment downtime per week, further reducing production efficiency.

The Yanggu Henglong technical team first communicated with the customer to understand their drilling equipment model and rock sample parameters. Based on their experience in quarrying services, they developed a targeted solution:

• Product Selection: Recommended the use of a 7° 8-tooth carbide ball-tooth drill bit. The 7° small-angle tapered design perfectly matches the customer's drill rod, reducing power transmission loss; the scientific arrangement of 8 spherical carbide teeth improves rock-breaking efficiency, especially suitable for medium-hard rock formations;
• Material Optimization: The drill bit body is forged from 42CrMo alloy steel and undergoes quenching and tempering heat treatment. The hardness is stable at HRC 30-35, providing excellent bending and impact resistance, capable of withstanding high-frequency drilling impacts;
• Compliance Guarantee: The product meets EU market access requirements;
• Technical Support: Professional personnel can provide customers with video guidance on drill bit installation and matching adjustments to help extend product lifespan.

After the solution was implemented and underwent two months of on-site testing, the customer reported significant improvements:

• Drilling efficiency increased by 50%: Granite mining speed increased from 1.2 meters/minute to 1.8 meters/minute, allowing for 120 meters of drilling per day and completing 3 additional mining batches per month, completely resolving project delays;
• Consumable costs reduced by 40%: Drill bit lifespan increased from 500 meters to 800 meters, reducing monthly procurement from 20 to 12 units, thus lowering consumable expenses;
• Equipment downtime reduced by 75%: Drill bits only needed to be replaced once a week, reducing downtime from 8 hours to 2 hours, further improving production efficiency;
• Long-term partnership established: In June 2025, the customer placed an additional order for 100 drill bits and designated Yanggu Henglong as a core supplier, while also recommending two local Spanish companies in the same industry for collaboration.

This case successfully addressed the quarry customer's core pain points—low efficiency and high costs—through a combination of "precise selection, material optimization, and technical support." It validated the superior performance of Yanggu Henglong's 7°8-tooth ball-tooth drill bits in medium-hard rock mining. Whether you are involved in quarrying, tunnel engineering, or slope reinforcement projects, if you face challenges in drilling efficiency or consumable costs, Yanggu Henglong can provide you with customized rock drilling tool solutions.