Hertel 89321442 Screw Machine Drill Bit 15/64 in Hss

Product Description

The HERTEL 89321442 is a screw machine length drill bit designed for general-purpose drilling in metal, plastic, and other common shop materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers consistent performance in production and maintenance drilling applications. The 118-degree split-point angle allows clean entry on flat or curved surfaces without a center punch in many setups. At 2-7/16 inches overall length, this stub-length geometry provides added rigidity compared to jobber-length bits, reducing deflection in short-hole applications. A right-hand cutting direction makes it compatible with standard drill presses, hand drills, and CNC spindles.

Screw machine length drill bits are commonly used in machining environments, sheet metal fabrication, plumbing rough-in, electrical trade work, and HVAC installation where controlled hole placement matters and shorter bit stiffness is an advantage. The 15/64 inch diameter is a common size for clearance holes, pilot holes, and tap drilling in light-gauge steel and aluminum. This bit suits licensed tradespeople and shop machinists working with power drills, drill presses, or turret lathes.

Key Features

• High-speed steel construction for durability in general-purpose metal and plastic drilling
• 118-degree point angle for clean, self-starting entry
• Bright/uncoated finish — no coating buildup to affect dimensional accuracy
• Stub screw machine length (2-7/16 inches OAL) for increased rigidity and reduced deflection
• Right-hand cut compatible with all standard rotary drilling equipment
• 1-5/16 inch flute length provides adequate chip clearance for typical hole depths

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for use in standard drill chucks, drill presses, and CNC turret equipment accepting 15/64 inch diameter tooling.

Installation Notes

Install in a properly sized drill chuck and verify the bit is fully seated and tightened before operation. Secure the workpiece firmly before drilling to prevent rotation or movement. Use appropriate cutting fluid on harder metals to extend bit life and improve hole quality. Inspect the cutting edges before each use — a chipped or dull point increases heat buildup and reduces accuracy.