Guhring 9012420031700 Screw Machine Drill Bit 0.125in

Product Description

The GUHRING 9012420031700 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding shop and field environments. Built to DIN 6539 standards, it features a 0.125 inch (1/8 inch) diameter, a 140-degree split point angle with web thinning, and a two-flute spiral configuration for fast chip evacuation. The straight-cylindrical shank seats securely in standard drill chucks and quick-change toolholders. Submicron carbide grade construction delivers edge retention and dimensional stability well beyond HSS tooling, making this bit a reliable choice for production drilling operations.

This bit is suited for drilling cast iron and steel in screw machine, CNC, and manual drill press applications. The screw machine length format provides increased rigidity compared to jobber-length bits, reducing deflection in short-hole and high-feed operations. The SU point geometry combined with web thinning allows clean entry without a center punch on rigid setups. With a maximum drilling depth of 0.522 inches and a flute-to-diameter ratio of 3xD, it is optimized for shallow to moderate depth holes in ferrous workpiece materials.

Key Features

• Solid carbide submicron grade construction for superior wear resistance in ferrous materials
• 140-degree SU point with web thinning for clean entry and reduced thrust
• Two-flute spiral configuration promotes efficient chip clearance
• Screw machine length format provides added rigidity and reduced deflection
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Manufactured to DIN 6539 specification for consistent dimensional accuracy

Compatibility

Designed for use in cast iron and steel workpiece materials. Part of GUHRING Series 1242, covering drill bit diameters in the 0.1000 to 0.1500 inch range per DIN 6539 specification.

Installation Notes

This drill bit is installed by machinists and toolroom technicians in CNC machining centers, screw machines, and manual drill presses. Secure the straight-cylindrical shank fully in a properly sized collet or chuck before operation. Verify spindle runout is within acceptable limits prior to use, as excess runout will accelerate edge wear on carbide tooling. Do not use in handheld drill applications; carbide tooling requires rigid machine setups to prevent breakage.