Guhring 9055190063500 Cobalt Jobber Drill Bit Letter E

Product Description

The GUHRING 9055190063500 is a cobalt jobber-length drill bit sized to Letter E (0.2500 inches, 1/4 inches) with a titanium nitride (TiN) coating and a 118-degree four-facet split point. Built to DIN 338 standards from M35 cobalt high-speed steel, it delivers consistent performance in demanding drilling applications. The two-flute spiral design with web thinning and a tapered web configuration improves chip evacuation and reduces thrust force at the cutting edge. Overall length is 101.00 mm and the straight-cylindrical shank is 0.2500 inches (6.35 mm) in diameter. This bit is suited for machinists, maintenance technicians, and metalworking professionals who need reliable hole quality in production or repair environments.

The 9055190063500 is designed for right-hand cutting in a range of workpiece materials including aluminum, general steels, stainless, and non-ferrous metals, as reflected by its material codes K, M, N, and P. Its 5xD flute-by-diameter ratio and 63.00 mm flute length support a maximum drilling depth of approximately 53.48 mm (2.106 inches). The TiN coating reduces friction and extends tool life in moderate-heat applications. This Series 5519 bit suits bench drill presses, knee mills, CNC machining centers, and hand-held electric drills with a standard keyed or keyless chuck.

Key Features

• M35 cobalt HSS construction for elevated heat and wear resistance
• Titanium nitride (TiN) coating reduces friction and extends tool life
• 118-degree four-facet split point with web thinning for reduced thrust and self-centering entry
• Two-spiral-flute, right-hand cut design conforming to DIN 338
• Straight-cylindrical shank (0.2500 inches) fits standard chucks without an adapter
• No coolant-through requirement; suitable for dry or flood-coolant setups

Compatibility

Designed as a DIN 338-compliant jobber-length drill bit for use in any drill press, milling machine, or handheld drill accepting a 1/4-inch straight-cylindrical shank. Compatible primary workpiece material codes K, M, N, and P as specified by the manufacturer.

Installation Notes

Installation and use should be performed by a qualified machinist or maintenance technician familiar with rotating cutting tools. Secure the shank fully in the chuck and verify zero runout before operation. Always bring the spindle to a complete stop before changing or inspecting the bit. Eye protection and appropriate chip guards are required per standard shop safety practice.