Hertel 4140422 Cobalt Jobber Drill Bit No. 50 0.0700 in

Product Description

The HERTEL 4140422 is a cobalt jobber-length drill bit in wire gauge size No. 50, with a decimal diameter of 0.0700 inches. It features a 135-degree split point for self-centering entry and reduced walking on hard or work-hardened materials. The flute is 1 inch long with an overall length of 2 inches. A titanium aluminum nitride (TiAlN) coating extends tool life by increasing surface hardness and heat resistance. This bit is ground for right-hand cutting and is classified as heavy duty. Machinists, maintenance technicians, and fabricators working with steel, stainless, and other tough alloys will find this drill suited to demanding holemaking applications.

This jobber drill is sized for precision holemaking in light to medium-duty production and maintenance environments. The No. 50 wire gauge size at 0.0700 inches is commonly used for tapping operations, pilot holes, and clearance holes in ferrous metals and hard plastics. The 2-inch overall length makes it compatible with standard drill chucks on benchtop drill presses, CNC machines, and hand-held power tools. Its heavy-duty cobalt construction and TiAlN coating make it a practical choice when high-speed steel bits wear too quickly in demanding materials.

Key Features

• No. 50 wire gauge size, 0.0700 inch diameter for precise small-diameter holemaking
• 135-degree split point reduces thrust, self-centers, and minimizes drill walk
• Cobalt construction provides increased hardness and heat resistance over standard HSS
• TiAlN coating extends cutting life in abrasive and high-temperature applications
• Right-hand cut, jobber-series length for broad compatibility with standard chucks
• Heavy-duty grade suitable for ferrous metals and work-hardened materials

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit for standard drill chucks and collets accepting a 0.0700 inch shank diameter.

Installation Notes

Installation of this drill bit is performed by machinists or maintenance technicians using a standard drill chuck or collet. Secure the shank firmly before operation and confirm the spindle speed is appropriate for the material being drilled. Do not force the bit through hardened material at excessive feed rates, as this can cause premature coating wear or tip failure. Coolant or cutting fluid is recommended when drilling ferrous metals, even though this bit does not support through-coolant delivery.