Hertel 4140190 Cobalt Jobber Drill No. 27 135 Deg

Product Description

The HERTEL 4140190 is a cobalt jobber-length drill bit sized to wire gauge No. 27 (0.1440 inches decimal), designed for holemaking in hard and abrasive materials where standard high-speed steel bits fall short. The bit carries a titanium aluminum nitride (TiAlN) coating that reduces heat buildup and extends tool life in demanding applications. A 135-degree split point geometry allows the bit to self-center on entry, reducing the need for a center punch on most workpieces. The straight-cylindrical shank fits standard drill chucks, and the right-hand spiral flute configuration handles chip evacuation efficiently during through-hole and blind-hole operations.

This bit is suited for metalworking applications in maintenance, repair, and manufacturing environments. It is appropriate for drilling mild steel, stainless steel, cast iron, and other hard ferrous and non-ferrous metals. The heavy-duty grade cobalt construction makes it a common choice for fabricators, millwrights, pipefitters, and machinists who drill high-strength alloys on a regular basis. The jobber-length series provides a balance of rigidity and reach suitable for general-purpose bench drilling, drill press work, and handheld operations.

Key Features

• Cobalt construction rated for heavy-duty drilling in hard and abrasive metals
• TiAlN coating reduces friction and heat, extending cutting life
• 135-degree split point self-centers on entry and reduces walking
• Web-thinned, tapered web design lowers thrust force requirements
• Right-hand spiral flute promotes efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks

Compatibility

Designed as a standard jobber-length drill bit for use in any drill press, CNC drilling machine, or handheld drill with a chuck capacity accommodating a 0.1440-inch straight-cylindrical shank.

Installation Notes

Install and remove drill bits only with the machine powered down and the spindle fully stopped. Secure the shank firmly in the chuck before use to prevent slippage under torque. TiAlN-coated cobalt bits perform best at appropriate feed rates and speeds for the material being drilled — consult published speeds-and-feeds data for the specific alloy. Redressing or regrinding the split point should be performed by personnel trained in drill geometry to maintain the original point configuration.