Center drills, often referred to as "centering drills" or simply "center drills," are a type of cutting tool used in machining and metalworking. These drills are designed to create a conical hole in a workpiece, providing a starting point for a standard twist drill. The conical shape helps to guide the twist drill accurately into the workpiece, ensuring that the hole is centered.

HSS CENTER DRILLS - BS SERIES

High-Speed Steel (HSS) center drills find applications in various machining and metalworking tasks. Here are some common applications: 
<ol>
<li>
Drill Starting Holes: The primary purpose of HSS center drills is to create a starting point for subsequent drilling operations. They are used to make a small, precise indentation in the workpiece, which serves as a guide for the main twist drill. This helps prevent the twist drill from wandering and ensures accurate hole placement. 
</li>
<li>
Precision Machining: HSS center drills are crucial in precision machining applications where accuracy is paramount. They are commonly used in metalworking processes where precision holes need to be drilled in materials like steel, aluminum, and other metals. 
</li>
<li>
Metalworking Operations: These drills are frequently employed in metalworking tasks such as milling, turning, and drilling. The high-speed steel construction allows them to withstand the heat generated during metal cutting processes. 
</li>
<li>
Woodworking: While less common in woodworking compared to metalworking, HSS center drills can be used to create starting points for drilling in wood, especially in applications where precise hole placement is important. 
</li>
<li>
Tool and Die Making: HSS center drills play a vital role in tool and die making industries, where precision is critical. They are used to create accurate starting points for various machining operations on molds and dies. 
</li>
<li>
Maintenance and Repair: In maintenance and repair tasks, HSS center drills are utilized for drilling and re-drilling holes with precision. They are valuable in situations where existing holes need to be enlarged or modified. 
</li>
<li>
Aviation and Aerospace: The aerospace industry often uses HSS center drills for precision drilling in the manufacturing of aircraft components. The ability of HSS to maintain its hardness at high temperatures makes it suitable for these applications. 
</li>
<li>Model Engineering : HSS center drills are widely used in general machine shop operations for a variety of tasks, including creating accurate starting points for drilling, chamfering, and countersinking.</li>
</ol>

APPLICATIONS

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Using center drills involves several steps to ensure accurate and efficient drilling. Here's a step-by-step guide on how to use center drills: 
<h3>Materials Needed: </h3>
<ol>
<li>Center drill</li>
<li>Workpiece</li>
<li>Drill press or lathe</li>
<li>Cutting fluid (if required)</li>
<li>Safety gear (safety glasses, ear protection, etc.) </li>
</ol>
<h3>Steps: </h3>
<ol>
<li>
Select the Right Center Drill: 
<ul>
<li>Choose a center drill that is appropriate for your application. Consider factors such as the material of the workpiece and the size of the hole you need. </li>
</ul>
</li>
<li>
Secure the Workpiece: 
<ul>
<li>Ensure that the workpiece is securely clamped or fixed in place on the drill press or lathe. This prevents movement during the drilling process and ensures accuracy. </li>
</ul>
</li>
<li>
Install the Center Drill: 
<ul>
<li>Insert the center drill into the chuck of the drill press or lathe. Make sure it is tightened securely. </li>
</ul>
</li>
<li>
Adjust Speed and Feed: 
<ul>
<li>Consult the specifications for the center drill and the material being drilled to determine the appropriate cutting speed and feed rate. Adjust the settings on the drill press or lathe accordingly. </li>
</ul>
</li>
<li>
Apply Cutting Fluid (if required): 
<ul>
<li>Depending on the material and the center drill being used, applying cutting fluid may be necessary to lubricate and cool the tool during the drilling process. Follow the manufacturer's recommendations for the specific cutting fluid. </li>
</ul>
</li>
<li>
Position the Center Drill: 
<ul>
<li>Bring the center drill into position above the point where you want to start drilling. The point of the center drill should touch the workpiece. </li>
</ul>
</li>
<li>
Align and Engage: 
<ul>
<li>Align the center drill with the desired drilling location on the workpiece. Lower the drill until it engages with the material. The conical point of the center drill will create a small, precise indentation in the workpiece. </li>
</ul>
</li>
<li>
Drilling: 
<ul>
<li>Once the center hole is created, you can proceed with the main drilling operation using a regular twist drill. The center hole serves as a guide, ensuring that the subsequent drilling is accurate and centered. </li>
</ul>
</li>
<li>
Clean and Inspect: 
<ul>
<li>After drilling, clean the workpiece and inspect the hole for accuracy. Remove any chips or debris from the drilling process. </li>
</ul>
</li>
<li>
Safety Precautions: 
<ul>
<li>Always wear appropriate safety gear, including safety glasses and ear protection. Follow all safety guidelines for the specific drill press or lathe being used. </li>
</ul>
</li>
</ol>
By following these steps, you can effectively use center drills to create accurate starting points for drilling operations in various materials.

How to Use

<ul>
<li>Manufactured from high speed steel for increased tool durability.</li>
<li>Manufactured as per BS328 Standards. 60&deg; inclusive angle</li>
<li>Center drills have a conical shape with a pilot tip that creates a small, precise indentation in the workpiece.</li>
<li>The primary purpose of center drills is to create a starting point for the subsequent drilling operation. They help prevent the twist drill from wandering and ensure that the hole is accurately centered.</li>
<li>Many center drills are double-ended, providing two cutting tips. This feature extends the tool's life and provides flexibility in case one end becomes dull.</li>
<li>Typical Applications : Steel, Stainless Steel, Cast Iron, Aluminium, Brass &amp; Plastics</li>
</ul>

<span style="color: rgb(55, 65, 81); font-family: S&ouml;hne, ui-sans-serif, system-ui, -apple-system, &quot;Segoe UI&quot;, Roboto, Ubuntu, Cantarell, &quot;Noto Sans&quot;, sans-serif, &quot;Helvetica Neue&quot;, Arial, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;, &quot;Segoe UI Symbol&quot;, &quot;Noto Color Emoji&quot;; font-size: 16px; white-space-collapse: preserve;">Center drills, often referred to as &quot;centering drills&quot; or simply &quot;center drills,&quot; are a type of cutting tool used in machining and metalworking. These drills are designed to create a conical hole in a workpiece, providing a starting point for a standard twist drill. The conical shape helps to guide the twist drill accurately into the workpiece, ensuring that the hole is centered.

The primary purpose of center drills is to create a starting point for the subsequent drilling operation. They help prevent the twist drill from wandering and ensure that the hole is accurately centered.

CAT NO.	BS NO.	BODY DIA	PILOT DIA.	OVERALL LENGTH
GCD-5441	BS1	1/8''	3/64''	1-1/2''
GCD-5442	BS2	3/16''	1/16''	1-3/4''
GCD-5443	BS3	1/4''	3/32''	2''
GCD-5444	BS4	5/16''	1/8''	2-1/4''
GCD-5445	BS5	7/16''	3/16''	2-1/2''
GCD-5446	BS6	5/8''	1/4''	3''
GCD-5447	BS7	3/4''	5/16''	3-1/2''

CUTTING TOOLS

HSS CENTER DRILLS

HSS CENTER DRILLS - BS SERIES

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