Hertel 28681294 Straight-flute Carbide Drill Bit 0.374 in

Product Description

The HERTEL 28681294 is a straight-flute carbide drill bit designed for precision drilling in hard and difficult-to-machine metals. Built from C2 carbide with a bright, uncoated finish, this bit features a 140-degree notched point and web-thinned geometry that reduces thrust load and improves chip evacuation at entry. The 0.374-inch diameter and right-hand cutting direction make it a practical choice for production drilling and maintenance applications where dimensional accuracy is critical. It is sized at 3.125 inches overall length with a 1.8125-inch flute length and is suited for use in CNC machining centers, drill presses, and hand-held power tools where rigidity is maintained.

This drill bit is built for professionals working with tough workpiece materials including stainless steel, chrome alloy, heat-treated alloy, nickel alloy, titanium alloy, and standard steel. The straight-flute design is well suited for short-chipping materials where a standard spiral flute would struggle to clear chips efficiently. Machinists, tool-and-die professionals, and maintenance technicians in manufacturing, aerospace, and heavy industrial settings will find this bit appropriate for through-hole and blind-hole drilling in ferrous and high-alloy workpieces.

Key Features

• C2 carbide construction for extended tool life in hard and abrasive materials
• 140-degree notched point reduces walking and improves entry accuracy
• Web-thinned geometry lowers thrust requirements and enhances chip flow
• Straight-flute design optimized for short-chipping materials such as stainless steel and titanium alloy
• Bright uncoated finish compatible with a wide range of cutting fluids and dry-cutting applications
• Right-hand cutting direction, 2-flute configuration for balanced chip load

Compatibility

Designed for use as a Series 470 straight-flute carbide drill bit for drilling chrome alloy, heat-treated alloy, nickel alloy, stainless steel, steel, and titanium alloy workpieces. Diameter tolerance is held to +0.0000 to -0.0005 inches for close-tolerance hole applications.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool safety practices. Secure the bit firmly in a compatible chuck or collet rated for the shank diameter before operation, and verify that the drilling machine spindle speed and feed rate are appropriate for the workpiece material and bit diameter. Always use appropriate cutting fluid or coolant unless running a validated dry-cutting application, and inspect the cutting edges for wear or chipping before each use. Do not exceed the tool manufacturer-recommended depth-to-diameter ratio for straight-flute drill bits in a single pass.