Hertel 74130238 Screw Machine Drill Bit 3/16 in Cobalt

Product Description

The HERTEL 74130238 is a screw machine length drill bit designed for high-production drilling in metal, alloy, and hard-material applications. Built from cobalt high-speed steel (HSCO), the bit delivers improved heat and wear resistance compared to standard M2 HSS tooling. The 135-degree split point geometry reduces walking and thrust at entry, enabling faster starts without a center punch. At 2-3/16 inches overall length and 3/16 inch diameter, the stub-length body provides rigidity in drill press, CNC, and hand-held power tool setups. Machinists, tool-and-die workers, and maintenance mechanics are the primary users.

Screw machine length bits are the standard choice when drilling through sheet metal, structural steel, stainless steel, cast iron, and other ferrous and non-ferrous materials that generate high cutting temperatures. The shortened flute and body length reduce deflection in tight-clearance fixtures and gang-drilling jigs. This bit is well suited to production shops, maintenance departments, and fabrication environments where tool life under high-cycle conditions matters.

Key Features

• Cobalt HSS construction resists heat buildup in hard and abrasive materials
• 135-degree split point reduces entry thrust and eliminates center-punch requirement
• Web-thinned parallel web configuration lowers cutting resistance and improves chip evacuation
• Regular spiral flute promotes consistent chip flow during through-hole drilling
• Straight cylindrical shank fits standard drill chucks without adapters
• Right-hand cutting direction compatible with all conventional drill presses and drivers

Compatibility

Designed as a standard screw machine length replacement bit for use in any drill press, CNC machining center, or hand-held drill accepting a straight cylindrical shank in the 3/16 inch diameter class.

Installation Notes

A licensed machinist or qualified maintenance mechanic should verify spindle speed and feed rate for the workpiece material before drilling. Secure the workpiece firmly in a vise or fixture before starting the cut. Coolant is not required through the tool, but external cutting fluid is recommended when drilling stainless steel or hardened alloys to extend tool life. Inspect the shank seating in the chuck before each use to prevent runout.