Hertel 74130600 Cobalt Screw Machine Drill Bit Size 9

Product Description

The HERTEL 74130600 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including stainless steel, hardened alloys, and other difficult-to-machine metals. Built to Size 9 wire gauge, it measures 0.1960 inches in diameter with an overall length of 2.25 inches and a flute length of 1.1875 inches. The 135-degree split point geometry reduces walking on entry, eliminating the need for a center punch in most applications. Web-thinned construction lowers thrust requirements and improves chip evacuation. The straw finish indicates heat treatment consistent with cobalt-grade tooling. This bit is sized for production environments and toolroom use where stub-length rigidity is preferred over jobber-length reach.

Screw machine length drill bits are commonly used in CNC machining centers, drill presses, and manual lathes where a shorter flute length provides added rigidity and reduced deflection. The 74130600 is appropriate for drilling in carbon steel, alloy steel, stainless steel, cast iron, and similarly hard materials where standard high-speed steel tooling wears prematurely. Machinists, tool-and-die workers, and maintenance technicians in industrial and manufacturing environments are the primary users. The straight cylindrical shank fits standard drill chucks and collet holders without adapters.

Key Features

• Cobalt construction for extended tool life in hardened and abrasion-resistant materials
• 135-degree split point reduces drill walking and lowers entry thrust
• Web-thinned, parallel web configuration improves chip flow and cutting efficiency
• Screw machine length (2.25 inches OAL) provides greater rigidity than jobber-length bits
• Right-hand cutting with regular spiral flute for standard drilling operations
• Straight cylindrical shank fits standard chucks and collet systems without adapters

Compatibility

Designed for use in any drill chuck or collet holder accepting a straight-shank bit at 0.1960 inch diameter, including CNC machining centers, drill presses, and engine lathes equipped for screw machine length tooling.

Installation Notes

Install and remove tooling only with the machine powered off and spindle fully stopped. Secure the shank fully within the chuck or collet to minimize runout and prevent slippage under load. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life, as this bit does not support through-coolant delivery. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point geometry is compromised.