In modern manufacturing, efficiency and precision are the key drivers of competitiveness. While indexable high speed drills have long been valued for their cost-effectiveness and productivity in small- and medium-diameter drilling, the same performance advantages are now being extended to large-diameter applications through the innovation of Indexable Core-Stay Drills.

At SHANG TZANG WANG ENTERPRISE CO., LTD., we specialize in both indexable high speed drills and indexable core-stay drills, helping manufacturers achieve optimal drilling performance across all diameters.

From High-Speed Drilling to Large-Diameter Efficiency

Traditional solid carbide or HSS drills are effective in small-diameter operations but become inefficient and costly when applied to large holes (typically 45 mm and above). The indexable high speed drill revolutionized smaller drilling by introducing replaceable inserts, allowing for faster cutting speeds, longer tool life, and lower tooling costs.

However, when it came to large-diameter drilling, most manufacturers relied on annular cutters or solid core drills, both of which require frequent resharpening or full replacement once worn. The indexable core-stay drill changes that. It combines the insert-based efficiency of indexable drills with the core-retaining mechanism of traditional core drills, resulting in faster, cleaner, and more economical large-hole drilling.

What Makes Indexable Core-Stay Drills Different

An indexable core-stay drill is designed with a replaceable insert system mounted on a rigid steel body. Instead of cutting away the entire cross-section of material, it removes material around the hole’s circumference, leaving a solid core intact.

Key advantages include:

• Replaceable Inserts: Only the carbide inserts are replaced when worn, not the entire tool.
• Reduced Power Demand: Since less material is removed, the cutting load and spindle torque are significantly lower.
• Improved Chip Control: The design promotes smoother chip evacuation, reducing tool stress and heat buildup.
• Longer Tool Life: The steel drill body can be reused for hundreds of cycles, maximizing investment returns.

This approach mirrors the proven efficiency of indexable high speed drills, but scaled up for large-diameter applications.

Efficiency That Scales

Just like indexable high speed drills, the core-stay version excels in:

1. Tool Cost Reduction: Inserts cost a fraction of a full tool replacement, especially for large diameters.
2. Minimized Downtime: Quick insert changes eliminate lengthy regrinding cycles.
3. Consistent Hole Quality: Indexable geometry ensures stable, repeatable performance.
4. Sustainability: Reusing the drill body reduces material waste.

For manufacturers operating in automotive, shipbuilding, construction, and heavy equipment sectors, this translates to higher throughput and lower operational costs.

Comparing to Annular Cutters

Annular cutters remain popular for portable or magnetic drilling machines, but in CNC environments, their maintenance overhead and limited precision make them less ideal.

Applications Across Industries

• Automotive and Truck Manufacturing: Efficiently drilling large holes in thick metal plates.
• Shipbuilding and Heavy Equipment: High stability drilling on structural steel.
• Energy and Infrastructure: Large-diameter precision drilling for pipelines and machinery bases.
• Aerospace: Machining lightweight but strong materials where rigidity and consistency matter.

Conclusion

The indexable core-stay drill brings the proven benefits of indexable high speed drills—cost savings, quick insert replacement, and long tool life—to the realm of large-diameter drilling. It’s a powerful evolution for manufacturers who demand precision and productivity without excessive tooling costs.

At SHANG TZANG WANG ENTERPRISE CO., LTD., we design and manufacture both indexable high speed drills and indexable core-stay drills, ensuring a full spectrum of solutions for every drilling application. Whether you’re seeking faster production cycles or better long-term economy, our tools are built to deliver outstanding results.

For more information, please refer to our catalog or contact us directly.