| Drill Material | High Speed Steel |
|---|---|
| Shank Sizes | 1/8″, 3/16″ and 1/4″ |
Back to Center Drills
3-piece Center Drill Set
Center drills are essential for accurately drilling starter holes in the ends of workpieces, particularly when mounting stock between centers on a lathe. Each drill creates a small pilot hole followed by a 60° countersink, which provides a seating surface for the 60° point of the lathe center.
In milling applications, center drills are commonly used to start holes precisely. The exact hole location can be dialed in using the mill’s calibrated handwheels, and the center drill ensures the hole begins accurately without drifting.
This set includes three double-ended, high-speed steel (HSS) center drills:
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#1 drill: 1/8″ shank
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#2 drill: 3/16″ shank
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#3 drill: 1/4″ shank
The larger shank diameter of a center drill ensures the tip remains centered, reducing the risk of the drill “walking” as the hole is started. After the center drill has established the starter hole, it is replaced with a standard drill bit to complete the hole to the desired diameter.
⚠️ CAUTION: Always use a suitable cutting lubricant and back the drill out frequently during use. This prevents the delicate tip from overheating or breaking off.
Related products
NIKX-STIKX Metal-Cutting Compound
NIKX-STIKX is a 2.2-ounce solid metal-cutting compound designed to enhance cutting performance. Unlike traditional lubricants, it is a wax-based compound applied directly to cutting tools and saw blades to reduce friction and promote smoother cuts. Its solid form eliminates the mess and spillage associated with liquid coolants.
Ideal for use on drills, end mills, parting tools, and more, NIKX-STIKX helps extend tool life and improve cutting efficiency. It is also a trusted solution used daily in the Sherline manufacturing shop.
