Hertel 16704371 Screw Machine Drill Bit Letter J Solid Carbide

Product Description

The HERTEL 16704371 is a solid carbide screw machine length drill bit sized to Letter J (0.2770 inches decimal equivalent) with a 135-degree split-point geometry. Screw machine length bits are shorter than jobber-length tools, which improves rigidity and reduces deflection in high-precision drilling applications. The 135-degree point angle self-centers on contact, reducing the need for a center punch on flat stock. Two slow-spiral flutes are designed to evacuate chips from hard, stringy, and abrasive materials. The straight cylindrical shank is compatible with standard drill chucks and collet holders. This bit is manufactured from solid carbide throughout, delivering the hardness and heat resistance required for demanding workpiece materials.

This drill bit is intended for use in CNC machining centers, drill presses, and manual machine tools where close-tolerance hole production is required. The slow spiral flute design and solid carbide construction make it well suited for drilling cast iron, nickel alloys, stainless steel, titanium alloys, and tool steel. It is appropriate for production shops, maintenance machining, and toolroom applications where hole quality and tool life in hard materials are the primary concerns. The uncoated bright finish is typical for carbide tooling used across a range of cutting fluids and dry cutting conditions.

Key Features

• Letter J size (0.2770 inches) with 135-degree self-centering split point
• Solid carbide construction for high hardness and extended tool life in abrasive materials
• Slow spiral flute geometry promotes efficient chip evacuation in hard and stringy metals
• Screw machine length OAL improves rigidity and minimizes deflection versus jobber-length bits
• Right-hand cut with straight cylindrical shank for compatibility with standard chucks and collet holders
• Bright uncoated finish suitable for use with a variety of cutting fluids

Compatibility

Designed as an OEM-style replacement screw machine length drill bit for use in standard drill chucks and collet holders accepting a straight cylindrical shank in the 0.25 to 0.30 inch diameter range.

Installation Notes

Installation and use should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify that the chuck or collet is clean and free of debris before seating the shank to prevent runout. Carbide tooling is brittle and should not be subjected to side loads or impact; always use appropriate feeds and speeds for the workpiece material.