Hertel 89321087 Drill Bit Letter D 118 Point Hss

Product Description

The HERTEL 89321087 is a screw machine length drill bit designed for general-purpose drilling in metal, wood, and plastic. It carries a Letter D designation, corresponding to a decimal diameter of 0.2460 inches, and features a 118-degree split-free point that centers quickly on contact. The shorter screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection in tight clearance setups and chuck-close drilling operations. Constructed from high-speed steel with a bright, uncoated finish, this bit is suited for use in drill presses, CNC lathes, turret lathes, and hand-held power tools where a compact, rigid cutting tool is required.

This bit is appropriate for production and maintenance drilling in light manufacturing, fabrication shops, and job site work. The screw machine format is commonly used when drilling from a turret or gang drill where overall length clearance is limited. With a right-hand cutting direction, it is compatible with standard clockwise-rotating spindles found on the vast majority of drill presses and machining centers. General-purpose grade construction makes it a practical choice for technicians and machinists working with mild steel, aluminum, brass, and thermoplastics.

Key Features

• Letter D size: 0.2460 inch decimal diameter for precise hole sizing
• 118-degree point angle for fast engagement and self-centering on flat stock
• Screw machine length body provides increased rigidity and reduced deflection
• High-speed steel construction retains cutting edge through normal production drilling cycles
• Bright uncoated finish suitable for use with cutting fluid or dry
• Right-hand cut compatible with standard clockwise-rotating spindles

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for use in standard drill chucks, turret lathes, gang drills, and CNC machining centers with right-hand spindle rotation and chucks accepting shank diameters within the 0.2460 inch range.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotating cutting tools. Ensure the drill press or machine spindle is fully stopped and de-energized before inserting or removing the bit from the chuck. Secure the bit fully in the chuck to the maximum recommended grip depth and verify runout before beginning a drilling cycle. Use appropriate cutting fluid for the workpiece material to extend tool life and improve hole finish.