Hertel 74130964 Cobalt Screw Machine Drill Bit Size 44

Product Description

The HERTEL 74130964 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials where standard high-speed steel bits fall short. Built to wire gauge size 44 (0.0860 inches decimal), it features a 135-degree split point that starts on contact and reduces walking without a center punch. The web-thinned, parallel web construction improves chip evacuation and lowers thrust requirements. At 1.75 inches overall length, the stub-length format suits close-quarters drilling applications. This bit is suited for use in drill presses, CNC machines, and hand-held power drills by machinists, maintenance technicians, and industrial tradespeople.

Screw machine length drill bits are commonly used in production drilling, sheet metal work, and tight-clearance applications where a jobber-length bit would flex or chatter. The short flute length of 0.75 inches provides added rigidity. The straw finish indicates heat-treated cobalt steel, making this bit appropriate for stainless steel, cast iron, high-nickel alloys, and other work-hardening materials encountered in industrial maintenance and fabrication environments.

Key Features

• Cobalt construction for drilling stainless steel, cast iron, and work-hardening alloys
• 135-degree split point starts on contact and eliminates center-punch requirement in most setups
• Web-thinned parallel web reduces axial thrust and improves chip flow
• Stub screw machine length (1.75 inches OAL) adds rigidity and suits close-clearance drilling
• Right-hand cut with regular spiral flute geometry compatible with standard drill chucks
• Straight cylindrical shank fits standard 3-jaw chucks and collet systems

Compatibility

Designed as an OEM-style replacement or standard supply for screw machine length drill bit applications requiring wire gauge size 44 with a straight cylindrical shank. Fits any drill press, CNC turret, or hand-held driver chuck sized to accept a 0.0860-inch diameter straight shank.

Installation Notes

Ensure the drill press or machine spindle is powered down and locked out before changing bits. Secure the shank fully in the chuck and verify concentricity before running at speed. Cobalt bits tolerate dry drilling but perform best with appropriate cutting fluid on stainless or high-alloy workpieces. Do not use excessive feed pressure on thin-gauge material, as small-diameter bits at this size range are susceptible to breakage under side-load or deflection.