Guhring 9006530166700 Screw Machine Drill Bit 21/32 in

Product Description

The GUHRING 9006530166700 is a screw machine length (stub) drill bit designed for high-production drilling in metal fabrication and machining environments. Manufactured from M2 high-speed steel with a coated finish, this bit measures 0.6562 inches (21/32 inches) in diameter and carries a 118-degree cone relief point. Overall length is 4.685 inches (119 mm), keeping the tool compact for use in tight setups or screw machine applications. The two-flute, regular spiral design provides efficient chip evacuation, and web thinning reduces thrust requirements at the cutting edge. Qualified to DIN 1897, it is a heavy-duty grade tool intended for professional machining use.

This drill bit is suited for drilling cast iron and steel in production environments where a short, rigid tool is required. The stub length reduces deflection and improves hole accuracy compared to jobber-length bits, making it a practical choice for CNC machining centers, drill presses, and screw machines. The straight-cylindrical shank accepts standard drill chucks and collet systems. Maximum drilling depth is 1.378 inches (35 mm), consistent with its 3xD flute-to-diameter ratio. Machinists and toolroom technicians are the primary installers of this type of cutting tool.

Key Features

• M2 high-speed steel construction for durability in ferrous metal applications
• 118-degree cone relief point with web thinning to reduce entry thrust
• Stub (screw machine) length at 4.685 inches overall for rigidity and reduced deflection
• DIN 1897 standard compliance with h8 diameter tolerance for precise fitment
• Straight-cylindrical shank at 0.6563 inches diameter for broad chuck compatibility
• Coated finish for improved wear resistance and surface lubricity

Compatibility

Designed as a DIN 1897 Series 653 stub-length drill bit for use in standard drill chucks and collet systems accepting a 0.6563-inch straight-cylindrical shank. Primary workpiece materials are cast iron and steel.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians familiar with cutting tool safety. Ensure the machine spindle is fully stopped and locked out before changing tooling. Verify the chuck or collet is properly torqued and that the shank is fully seated before operation. Do not exceed the recommended maximum drilling depth of 1.378 inches for this stub-length configuration.