| SIZE | 1/4″ |
| NO. OF FLUTES | 2 |
| LENGTH OF CUT | 1/2″ |
| SHANK DIAMETER | 3/8″ |
| TOOL MATERIAL | High Speed Steel |
| FINISH COATING | Bright Finish |
| CENTER CUTTING | Yes |
| SINGLE OR DOUBLE END | Double |
| OVERALL LENGTH | 3-1/8″ |
| CUTTING DIRECTION | Right Hand |
| FLUTE SHAPE | Spiral Flute |
| FLUTE LENGTH | 1/2″ |
| HARDNESS | 58 to 60 RC |
1/4″ Double End Mill (2-Flute)
1/4″ mill diameter, 1/2″ cut, 3-1/8″ length
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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.
80° Carbide Insert
While carbide inserts may have a higher upfront cost, they offer excellent value by providing four usable cutting edges per insert and significantly reducing time spent on tool sharpening.
Carbide cutters excel at machining difficult materials such as cold-rolled steel, stainless steel, and bronze, delivering consistent performance and long tool life. They are also compatible with aluminum, brass, and leaded steels—though for these softer materials, a finely honed high-speed steel tool may still yield the best surface finish.
This is the 10-pack of replacement carbide inserts for the following tool holders: