Guhring 9012420045000 Screw Machine Drill Bit 0.177in

Product Description

The GUHRING 9012420045000 is a solid carbide, screw machine length drill bit designed for high-performance drilling in ferrous materials. Built to DIN 6539 standards, it features a 140-degree split point geometry with web thinning for reduced thrust and cleaner entry in hard materials. The straight-cylindrical shank seats securely in standard drill chucks and quick-change holders. At 0.177 inches (4.50 mm) in diameter, this two-flute bit is sized for wire gauge #16 work and delivers tight diameter tolerances of plus 0.004 to plus 0.016 mm. It is the right tool for machinists, tool-and-die technicians, and maintenance mechanics who need a reliable short-series drill for precision hole work in cast iron and steel.

This bit fits into production machining, MRO maintenance, and light manufacturing environments where screw machine length tooling is preferred for rigidity. The 3xD flute-to-diameter ratio and parallel web configuration make it well-suited for drilling into cast iron and steel workpieces on CNC machining centers, turret lathes, and manual drill presses. Maximum drilling depth reaches 0.679 inches (17.25 mm), making it appropriate for shallow-to-mid-depth blind and through holes in the materials listed. It ships individually as a single-piece unit.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance in ferrous materials
• 140-degree SU split point with web thinning reduces walking and entry thrust
• Screw machine (stub) length body improves stiffness and reduces deflection versus jobber-length bits
• Right-hand cut with regular spiral flute for standard chip evacuation
• DIN 6539 specification ensures dimensional conformance for drop-in replacement use
• Coated finish for extended tool life in high-cycle drilling applications

Compatibility

Designed as a DIN 6539 Series 1242 screw machine length drill for use in cast iron and steel workpieces. Fits any standard straight-shank drill chuck or collet holder accepting a 4.50 mm diameter shank.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the straight-cylindrical shank fully into the chuck or collet and verify runout before beginning a cut. Coolant-through is not supported on this bit, so apply cutting fluid externally when drilling steel to manage heat and extend tool life.