Hertel 16704736 Drill Bit Letter D 135 Deg Solid Carbide

Product Description

The HERTEL 16704736 is a screw machine length drill bit ground from solid carbide and sized to Letter D, which equals 0.246 inches in decimal. The 135-degree split-point geometry reduces walking on entry and lowers thrust force compared to a conventional 118-degree point. At 2.5 inches overall length, the shortened flute-to-body ratio is engineered for rigidity in tight-clearance drilling operations. Two slow-spiral flutes evacuate chips efficiently from difficult workpiece materials. The straight cylindrical shank seats directly in standard drill chucks without adapters. This bit ships uncoated, which makes it straightforward to inspect for wear and simplifies regrinding when needed.

This drill bit is intended for machining hard and abrasive materials including cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel. Screw machine length geometry is the standard choice on CNC machining centers, turret lathes, screw machines, and drill presses where stub-length rigidity reduces deflection and improves hole location accuracy. The slow spiral helps control chip load in gummy or stringy alloys. Machinists and tool-room technicians working in production or job-shop environments will find this size a frequent call in ferrous and exotic-metal applications.

Key Features

• Solid carbide construction for hardness and wear resistance in difficult workpiece materials
• 135-degree point angle reduces entry thrust and minimizes drill walking
• Slow spiral flute design manages chip evacuation in tough alloys such as stainless steel and titanium
• Screw machine length body provides extra rigidity to reduce deflection and improve hole accuracy
• Straight cylindrical shank fits standard drill chucks without additional tooling
• Bright uncoated finish allows easy visual inspection and supports regrinding

Compatibility

Designed as an OEM-style screw machine length drill bit for use in standard drill chucks and collet systems accepting a 0.246-inch straight cylindrical shank.

Installation Notes

Installation and operation of solid carbide cutting tools should be performed by qualified machinists or toolroom technicians. Ensure the machine spindle and chuck are fully stopped and locked out before inserting or removing the bit. Seat the shank fully and evenly in the chuck to prevent runout, which can chip carbide tooling. Follow machine manufacturer guidelines for appropriate feed rates and spindle speeds for the specific workpiece material being drilled.