Guhring 9012420088000 Carbide Screw Machine Drill Bit

Product Description

The GUHRING 9012420088000 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding production environments. Built to DIN 6539 standards, this bit measures 8.80 mm (0.3465 inches) in diameter with an overall length of 84.00 mm and a flute length of 40.00 mm. The 140-degree split point (SU point type) with web thinning reduces thrust and improves centering without a pilot hole. The coated finish extends tool life in abrasive materials. Machinists, tool-and-die technicians, and CNC operators working with cast iron and steel will find this bit suited to high-cycle production drilling applications.

This drill bit is optimized for use in cast iron and steel workpieces, making it a practical choice for production machining, job shop drilling, and screw machine operations. The screw machine length format provides added rigidity compared to jobber-length bits, reducing deflection in short-reach drilling setups. The straight-cylindrical shank seats securely in standard drill chucks and collet holders. With a 3xD flute-to-diameter ratio and a maximum drilling depth of 1.055 inches (26.80 mm), this bit fits conventional machining center and drill press workflows without requiring extended tooling.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance in ferrous materials
• 140-degree SU point with web thinning for reduced entry thrust and self-centering action
• Regular spiral, 2-flute design promotes chip evacuation in cast iron and steel
• Screw machine length format increases rigidity and minimizes deflection
• Straight-cylindrical shank compatible with standard chucks and collet holders
• Conforms to DIN 6539 specification for consistent dimensional tolerances

Compatibility

Designed as an OEM-compatible replacement or direct-use solid carbide drill bit for production drilling in cast iron and steel applications, conforming to DIN 6539 standards for screw machine length drills in the 8.00 to 9.50 mm diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide cutting tools. Ensure the spindle and work holding are fully stopped and secured before changing tooling. Solid carbide bits are brittle compared to high-speed steel — avoid lateral loading, interrupted cuts without proper feeds and speeds, or dropping the tool. Confirm chuck or collet runout is within acceptable limits before beginning a production run to prevent premature tool failure.