Guhring 9006180063500 Extra Length Cobalt Drill Bit

Product Description

The GUHRING 9006180063500 is a Series 618 extra length cobalt drill bit designed for deep hole drilling in demanding production environments. Measuring 0.25 inches in diameter with an overall length of 8.465 inches and a flute length of 5.906 inches, this bit reaches depths up to 5.531 inches in a single setup. The parabolic flute geometry promotes efficient chip evacuation at extended depths, reducing the need for peck drilling cycles. Constructed from uncoated cobalt high-speed steel, the bit delivers heat resistance and edge retention when cutting through tough alloys. A web-thinned, tapered web design reduces thrust force at the cutting point. It is sold individually and intended for use by machinists and toolroom professionals in CNC and manual drilling operations.

This drill bit is rated for deep hole drilling applications at a flute-to-diameter ratio of 15xD. Primary workpiece materials include aluminum and titanium alloy, with steel listed as a secondary application material. The straight-cylindrical shank measures 0.25 inches in diameter and 65 millimeters in length, providing secure chuck engagement on standard drill chucks and collet holders. The 130-degree drill point angle suits general-purpose hole entry on the listed materials. Right-hand cutting direction is standard. The bit conforms to DIN 1869 specification for extra length twist drills and is subject to California Proposition 65 requirements.

Key Features

• Parabolic flute geometry for efficient chip evacuation in deep hole drilling
• Cobalt construction provides heat resistance and edge retention on hard and abrasive materials
• Web-thinned, tapered web reduces cutting thrust and entry force
• 130-degree standard point angle suited for aluminum, titanium alloy, and steel workpieces
• 15xD flute-to-diameter ratio supports depths up to 5.531 inches without step drilling
• Conforms to DIN 1869 extra length drill standard

Compatibility

Designed as an OEM-grade Series 618 extra length drill for use in standard 0.25-inch drill chucks and collet systems; primary workpiece compatibility is aluminum and titanium alloy with secondary suitability for steel per manufacturer specification.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the straight-cylindrical shank fully in a chuck or collet before operation, verifying runout to minimize premature wear at extended lengths. Power down and lock out the machine spindle before changing bits. Do not exceed the rated maximum drilling depth of 5.531 inches without repositioning or confirming chip clearance, as chip packing in deep holes can cause bit breakage or workpiece damage.