Hertel 74129149 Straight-flute Drill Bit 7/64 in Carbide

Product Description

The HERTEL 74129149 is a straight-flute solid carbide drill bit designed for precision drilling in hard and difficult-to-machine materials. Built from C2-grade carbide with a bright, uncoated finish, this bit features a 140-degree notched point and web-thinned geometry that reduces entry thrust and improves chip clearance at the cutting edge. The 7/64-inch diameter measures 0.1094 inches in decimal, with a tight diameter tolerance of +0.0000 to -0.0005 inches for consistent hole sizing. Two right-hand flutes and a matching 7/64-inch shank make this bit suitable for use in standard drill chucks and precision machine setups. Machinists, toolroom technicians, and industrial maintenance professionals are the primary users of this bit.

This drill bit is engineered for use in chrome alloy, heat-treated alloy, nickel alloy, stainless steel, steel, and titanium alloy workpieces. It is well suited to production drilling, toolroom work, and maintenance applications where consistent hole geometry in tough materials is required. The straight-flute design makes it particularly effective in short-chipping materials where spiral flutes may pack with chips. It is sold individually as a single-piece unit.

Key Features

• Solid C2-grade carbide construction for hardness and wear resistance in ferrous and exotic alloys
• 140-degree notched point for reduced thrust and self-centering entry
• Web-thinned geometry reduces cutting force and improves chip ejection
• Tight diameter tolerance of +0.0000 to -0.0005 inches ensures consistent hole sizing
• Straight-flute design performs well in short-chipping materials including stainless steel and titanium alloy
• Bright, uncoated finish for general-purpose use without coating-related dimensional buildup

Compatibility

Designed for use in chrome alloy, heat-treated alloy, nickel alloy, stainless steel, steel, and titanium alloy workpieces. Fits standard 7/64-inch drill chucks and collet systems accepting a 0.1094-inch shank diameter.

Installation Notes

This bit is intended for use by machinists and trained tool operators on drill presses, CNC machining centers, or handheld power drills with appropriate chuck capacity. Secure the workpiece firmly before drilling and set spindle speed according to the workpiece material and manufacturer guidelines for carbide tooling. Coolant-through is not supported on this bit, so external coolant or cutting fluid is recommended when drilling hard alloys to manage heat buildup. Inspect the cutting edge before each use, as carbide is brittle and susceptible to chipping if dropped or subjected to side loading.