Hertel 16704819 Screw Machine Drill Bit Size 45 Carbide

Product Description

The HERTEL 16704819 is a screw machine length drill bit ground from solid carbide and designed for high-precision short-hole drilling in demanding materials. At 0.0820 inches in diameter (wire size 45), it delivers a 135-degree split-point geometry that reduces thrust and self-centers on entry without a pilot hole. The overall length is 1.75 inches with a 0.75-inch flute length, giving machinists and toolroom techs a rigid, stub-length profile that minimizes deflection in CNC machining centers, drill presses, and production screw machines. The bright uncoated finish keeps the carbide substrate exposed for applications where coating buildup or edge geometry alteration is not acceptable.

This bit is suited for production and toolroom work involving hard and abrasive workpiece materials. Primary target materials include cast iron, nickel alloys, stainless steel, titanium alloys, and tool steel. The slow spiral flute design is optimized for these hard, short-chipping materials, promoting chip evacuation without compromising edge strength. Right-hand cut with a straight cylindrical shank, it fits standard collets and drill chucks in both manual and automated setups. Typical users include CNC machinists, tool and die makers, and precision manufacturing technicians.

Key Features

• Solid carbide construction for rigidity and heat resistance in hard-material drilling
• 135-degree split-point angle reduces entry thrust and eliminates walking on hard surfaces
• Slow spiral flute geometry optimized for short-chipping materials such as cast iron and stainless steel
• Bright uncoated finish preserves tight diameter tolerance and sharp edge geometry
• Screw machine (stub) length minimizes deflection in tight-clearance or high-feed applications
• Straight cylindrical shank fits standard collets and drill chucks without adaptation

Compatibility

Designed as an OEM-style screw machine length drill bit for use in CNC machining centers, drill presses, and production screw machines accepting a straight cylindrical shank at 0.0820 inches diameter.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with carbide tooling. Power down and lock out the machine spindle before seating or removing the bit from the chuck or collet. Solid carbide is brittle compared to high-speed steel — avoid lateral loading, interrupted cuts beyond the tool's rated capacity, or dropping the bit on hard surfaces. Follow machine manufacturer feed and speed recommendations for the specific workpiece material; carbide tooling typically requires higher surface speeds and consistent chip evacuation to prevent edge chipping.