Hertel 89322168 Drill Bit Letter T 0.3580 in 118 Deg Hss

Product Description

The HERTEL 89322168 is a screw machine length drill bit sized to Letter T (0.3580 inches decimal equivalent), designed for general-purpose drilling in metal, wood, and plastic. Built from high-speed steel (HSS) with a bright uncoated finish, it delivers reliable performance across a wide range of shop and field applications. The 118-degree point angle is the standard geometry for most production and maintenance drilling tasks. With an overall length of 3.0625 inches, the shortened flute and body length of the screw machine style provides added rigidity and reduced deflection compared to jobber-length bits, making it well-suited for use in drill presses, CNC machines, and handheld power drills where stub-length control is preferred.

This drill bit is intended for machinists, maintenance technicians, fabricators, and trade professionals who require a dependable general-purpose bit in a shorter, stiffer profile. The Letter T size fits applications where a 0.358-inch hole diameter is specified, such as tapping undersized holes or producing clearance holes for specific fastener sizes. Its right-hand cut geometry is compatible with standard drill chucks and CNC spindles without modification.

Key Features

• Letter T size with 0.3580 inch decimal equivalent for precise hole sizing
• 118-degree point angle provides standard general-purpose geometry suitable for most materials
• High-speed steel construction offers good wear resistance across common drilling materials
• Bright uncoated finish allows visual wear inspection and suits non-abrasive material applications
• Screw machine length (3.0625 inches OAL) delivers added rigidity and reduced deflection vs. jobber-length bits
• Right-hand cut compatible with all standard drill chucks and CNC spindles

Compatibility

Designed as a general-purpose screw machine length drill bit for use in standard three-jaw drill chucks, CNC machining centers, and benchtop drill presses accepting bits in the 0.3500 to 0.4000 inch size range.

Installation Notes

Install and remove drill bits only when the drill press, lathe, or power tool is fully powered down and the spindle has stopped completely. Secure the bit firmly in the chuck and verify there is no lateral wobble before initiating a cut. Use appropriate cutting fluid or coolant when drilling ferrous metals to extend bit life and maintain hole quality. Disposal of worn HSS tooling should follow local shop waste procedures.