Hertel 16704603 Screw Machine Drill Bit 7/16 in

Product Description

The HERTEL 16704603 is a solid carbide screw machine length drill bit designed for high-precision drilling in demanding materials. Built with a 135-degree split-point geometry, it reduces walking and thrust on entry, making it well-suited for production drilling without a center punch. The 7/16-inch diameter straight-cylindrical shank fits standard drill chucks and CNC toolholders. At 3-7/16 inches overall length, this stub-series bit delivers added rigidity over jobber-length counterparts, helping maintain hole straightness in tough workpiece materials. The bright, uncoated finish is compatible with a wide range of cutting fluids and dry cutting applications.

This bit is intended for trade machinists, tool-and-die shops, and maintenance technicians working in metal fabrication environments. The slow-spiral flute design is optimized for cutting cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel — materials that demand a rigid, wear-resistant substrate. It is a practical choice for screw machine operations, drill press work, and CNC machining centers where short, stiff tooling reduces deflection and improves hole quality in hard or abrasive stock.

Key Features

• Solid carbide construction provides superior hardness and wear resistance in hard metals and abrasive alloys
• 135-degree point angle reduces entry thrust and minimizes bit walking on curved or flat surfaces
• Slow-spiral flute geometry optimized for short-chipping materials such as cast iron and stainless steel
• Screw machine (stub) length adds rigidity and reduces deflection compared to jobber-length bits
• Bright uncoated finish compatible with most cutting fluids and dry machining setups
• Right-hand cut with a straight-cylindrical shank for broad chuck and toolholder compatibility

Compatibility

Designed as a replacement-style screw machine length drill bit for use with standard straight-shank drill chucks, collet holders, and CNC toolholders accepting a 7/16-inch diameter shank. Primary workpiece materials include cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or tooling technicians familiar with CNC or manual drilling equipment. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or toolholder. Confirm shank seating depth and chuck torque per the machine manufacturer specifications before beginning a cut. Coolant-through is not supported on this bit; apply external cutting fluid as appropriate for the workpiece material.