What is a center drill, and how does it differ from a point drill?

Center drills are used to create a precise starting point, ensuring accuracy and preventing drill bit deviation. They are also used on lathes to drill precise holes in workpieces for tailstocks.

Center Drill Introduction

Center drill is a specialized drill bit used to create holes suitable for the center of a lathe. Its drill tip consists of two parts: one is the guide end, and the other is the larger countersunk hole end. It is typically used on lathes to drill precise holes required for the tailstock of workpieces.

Center drills are typically made of high-speed steel or carbide. Carbide center drills are widely used due to their durability and heat resistance. They are suitable for precise drilling on various materials. They can operate at high speeds, and compared to high-speed steel center drills, carbide center drills are more efficient in high-demand drilling tasks. Therefore, they are widely used in various industries, including the automotive industry, mold industry, and aerospace industry.

Center Drill Usage Tips

The performance of a center drill is influenced by its size and angle. Larger angles (e.g., 90°) are suitable for drilling harder materials, while smaller angles (e.g., 60°) are more suitable for drilling softer materials.

1. Using a center drill with an angle slightly greater than the main drill bit angle during machining can achieve optimal results.
2. Minimize drill bit deviation to ensure drilling accuracy.
3. Proper use and regular maintenance can extend the service life of the center drill.

Differences Between Center Drills and Spot Drills

Although center drills and spot drills appear similar, their purposes differ.

The spot drill is shorter and harder, which reduces bending. It is only used to pre-damage the surface before drilling, serving as a drill bit positioning device.

Center drills are used in high-precision applications, particularly for drilling holes at the center of raw materials to facilitate machining on a lathe.

Understanding these differences can help you make informed decisions based on specific tasks. For example, if you need a tapered drill bit to enhance precision, a center drill would be the better choice. On the other hand, a point drill is the preferred tool for precise and rigid hole-making operations.

Need custom carbide center drills?

It’s easy, you can view our custom center drill page to custom you tools.We have single point and double end models for you choose.

Or contact our customer support team at email: info@zlycuttingtools.com and our sales staff: liam@zlycuttingtools.com or click here to the WhatsApp, both of which will help you get in touch with our sales and support teams to resolve your issue.

If you need a detailed guide, please click here to view it.

If you need more product information, you can go to our product page – carbide center drill page to learn more.

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