Guhring 9006220044000 Cobalt Jobber Drill Bit 4.4mm

Product Description

The GUHRING 9006220044000 is a cobalt jobber-length drill bit designed for high-performance drilling in a wide range of materials. Built to DIN 338 standards, it features a 4.4 mm (0.1732 inch) diameter, a 130-degree drill point angle, and a parabolic flute geometry that promotes efficient chip evacuation. The bright, uncoated finish and web-thinned tip reduce thrust and improve penetration, particularly in softer and medium-hardness workpiece materials. With an overall length of 3-5/32 inches and a straight-cylindrical shank, this bit is well-suited for use in standard drill chucks on manual or CNC-driven spindles. Machinists, tool-and-die workers, and maintenance technicians typically reach for this size for precision hole-making operations.

This drill bit is rated primarily for aluminum and similar non-ferrous and thermoplastic workpiece materials, covering material codes K, N, and P. Its parabolic flute design and 5xD flute-to-diameter ratio make it a practical choice for through-hole and blind-hole applications where chip clearance is a priority. The 130-degree point angle handles a broad range of materials without requiring a pilot hole at this diameter. It is suitable for general-purpose production drilling, prototype work, and maintenance repair operations in both shop and field environments.

Key Features

• Cobalt construction provides heat resistance and extended tool life in demanding drilling applications
• 130-degree drill point angle reduces walking and improves centering on entry
• Parabolic flute geometry with 5xD ratio ensures efficient chip evacuation and reduced chip packing
• Web-thinned, tapered web lowers thrust requirements at the drill tip
• Straight-cylindrical shank fits standard 3-jaw drill chucks without adapters
• Meets DIN 338 specification for consistent dimensional accuracy and interchangeability

Compatibility

Designed as an OEM-specification replacement or direct-use drill bit for applications requiring a 4.4 mm cobalt jobber-length drill conforming to DIN 338. Suitable for use with aluminum, non-ferrous metals, and thermoplastics (material codes K, N, P) as noted in the manufacturer specifications.

Installation Notes

This drill bit is installed by machinists and maintenance technicians using standard drill chucks or collet holders rated for the 0.1732-inch shank diameter. Secure the shank fully in the chuck before operation and confirm runout is within acceptable limits for the application. Always operate at appropriate feed and speed rates for the workpiece material to avoid premature wear or breakage. Wear appropriate eye and hand protection per shop safety protocols when drilling.