Guhring 9055100158700 Screw Machine Drill Bit 5/8 in

Product Description

The GUHRING 9055100158700 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding industrial and trade applications. Built to DIN 6537K standards and coated with FIREX, it delivers extended tool life and reliable hole quality in tough workpiece materials. The 5/8 inch diameter bit features a 140-degree split point (SU geometry) with web thinning for reduced thrust force at entry. Overall length is 4.5276 inches (115 mm) and the tool weighs approximately 0.1 pounds. Licensed machinists, tool-and-die professionals, and mechanical contractors working with production drilling equipment are the primary users of this bit.

This drill bit is suited for production and maintenance drilling in cast iron and steel. The screw machine length (stub) profile is a common choice for CNC machining centers, drill presses, and screw machines where rigidity and minimal runout are critical. The 3xD flute-to-diameter ratio and tapered web configuration support efficient chip evacuation at moderate-to-high spindle speeds. Coolant-through capability allows internal coolant delivery to the cutting zone, making it effective for deep-hole and high-feed-rate cycles in ferrous metals.

Key Features

• Solid carbide construction with FIREX coating for heat and wear resistance in ferrous materials
• 140-degree SU split point with web thinning reduces entry thrust and improves centering accuracy
• Coolant-through design supports internal coolant delivery for thermal management at the cutting edge
• Straight-cylindrical shank at 0.6299 inch (16.00 mm) diameter for secure chuck or collet holding
• Screw machine (stub) length provides increased rigidity compared to jobber-length bits
• Manufactured to DIN 6537K specification using DK460UF carbide grade for consistent dimensional tolerance (+0.007 to +0.025 mm)

Compatibility

Designed for use in cast iron and steel workpieces. Compatible with CNC machining centers, drill presses, and screw machines accepting a 0.6299 inch straight-cylindrical shank. Conforms to DIN 6537K specification.

Installation Notes

Installation and use should be performed by qualified machinists or tool operators familiar with carbide tooling and machine setup procedures. Ensure the machine spindle and chuck or collet are clean and within runout tolerance before seating the shank. Carbide tooling is brittle — avoid side loading, interrupted cuts beyond the tool rating, or dropping the bit on hard surfaces. Always confirm coolant flow is active before initiating a coolant-through drilling cycle.