Hertel 71206163 Jobber Length Drill Bit Letter Y Hss

Product Description

The HERTEL 71206163 is a jobber-length drill bit sized to Letter Y (0.4040 inches decimal equivalent) and designed for general-purpose drilling in metal, wood, and plastic. Built from high speed steel with an oxide coating, it resists heat buildup and surface wear during repeated use. The 118-degree standard point angle and web-thinned tip geometry reduce thrust at entry and help the bit self-center without a pilot hole. With an overall length of 5.25 inches and a flute length of 3.875 inches, this bit fits standard drill chucks used by machinists, maintenance technicians, and metal fabricators.

This drill bit is suited for general-purpose production and maintenance drilling applications where a Letter Y diameter is required. The straight-cylindrical shank at 0.4040 inches diameter seats directly in three-jaw drill chucks on benchtop drill presses, hand drills, and CNC drilling setups. The right-hand spiral flute with regular helix evacuates chips efficiently in through-hole and blind-hole operations. It is sold as a single bit and is appropriate for shops and field technicians who need a reliable replacement or supplemental bit in the 0.400 to 0.500 inch size range.

Key Features

• Letter Y size — 0.4040 inches decimal equivalent, within the 0.4000 to 0.5000 inch range
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• High speed steel construction with oxide coating for heat and wear resistance
• Right-hand cut, regular spiral flute for efficient chip evacuation
• Straight-cylindrical shank fits standard three-jaw drill chucks without an adapter
• Two-flute design — 3.875-inch flute length within a 5.25-inch overall length

Compatibility

Designed as a general-purpose jobber-length drill bit for use in any standard drill chuck accepting a 0.4040-inch straight-cylindrical shank, including benchtop drill presses, hand drills, and CNC drilling equipment.

Installation Notes

A licensed machinist or qualified maintenance technician should secure the shank fully in the chuck and verify concentricity before drilling. Ensure the workpiece is clamped or fixtured — never hand-hold metal stock during drilling. Use appropriate cutting fluid for ferrous materials to extend bit life. Inspect the cutting edges for wear before each use and replace the bit when point geometry degrades to avoid work-hardening the material.