Hertel 85704021 Jobber Drill Bit Wire 25 Hss 118 Degree

Product Description

The HERTEL 85704021 is a jobber-length twist drill bit sized to wire gauge 25, equivalent to 0.1495 inches in diameter. Built from high speed steel with a bright uncoated finish, it is designed for general-purpose drilling in metal, wood, and plastics. The standard 118-degree split point geometry with web thinning reduces walking on entry and lowers thrust requirements. Two spiral flutes with a regular helix evacuate chips efficiently through the 1.875-inch flute length. Overall length is 3 inches. The straight cylindrical shank seats securely in standard keyless or keyed chucks. This bit is a common choice for HVAC, plumbing, electrical, and general fabrication technicians who need reliable small-diameter hole-making in the field or shop.

The 85704021 is suited for light-to-medium duty applications requiring a 0.1495-inch diameter hole. Typical uses include pilot holes, sheet metal penetrations, conduit work, bracket fabrication, and pilot drilling ahead of larger bits. The general-purpose grade makes it appropriate for intermittent production and maintenance drilling across residential and light commercial trade work. The compact 3-inch overall length fits standard drill chucks without requiring an extension.

Key Features

• Wire gauge 25 diameter: 0.1495 inches for precise small-hole sizing
• 118-degree standard point angle with web thinning for reduced entry thrust
• High speed steel construction handles a wide range of base materials
• Bright uncoated finish allows easy visual inspection for wear
• Regular spiral flute geometry promotes consistent chip evacuation
• Straight cylindrical shank fits standard 3-jaw chucks without adapters

Compatibility

Designed as a general-purpose jobber-length drill bit fitting any standard drill chuck capable of accepting a 0.1495-inch straight cylindrical shank.

Installation Notes

This bit is installed and operated by HVAC technicians, electricians, plumbers, and general tradespeople using handheld or bench-mounted drills. Secure the shank fully in the chuck before operation and confirm the workpiece is clamped or fixtured to prevent rotation. Use appropriate cutting fluid or lubricant when drilling ferrous materials to extend bit life. Replace the bit at the first sign of dulling to avoid wandering, oversized holes, or heat damage to the workpiece.