Guhring 9002050069000 Jobber Drill Bit Letter I Hss

Product Description

The GUHRING 9002050069000 is a Letter I jobber-length drill bit ground from M2 high speed steel with an oxide coating. It produces a 0.2717-inch (6.90 mm) diameter hole using a standard 118-degree split point and a two-flute regular spiral for chip evacuation. Overall length is 109.00 mm with a 69.00 mm flute length and a 40.00 mm straight-cylindrical shank. The web-thinned, tapered-web geometry reduces entry force on hard materials. Manufactured to DIN 338, this bit is a general-purpose tool suited for HVAC fabricators, plumbers, electricians, and sheet-metal trades drilling cast iron and steel in production or field conditions.

This drill bit is sized at Letter I, equivalent to 0.2717 inches decimal, placing it in the 0.2500 to 0.3000 inch diameter range. It is intended for right-hand rotation in standard drill presses, hand drills, and CNC machining centers where a straight-cylindrical shank is accepted. Primary workpiece materials are cast iron and steel, consistent with GUHRING material codes K and P. Coolant-through capability is not present in this model, making it appropriate for conventional dry or flood-coolant setups. The 5xD flute-to-diameter ratio supports drilling depths up to 58.65 mm (2.309 inches) without retracting to clear chips.

Key Features

• Letter I size — 0.2717-inch decimal equivalent, DIN 338 standard
• M2 high speed steel construction with oxide surface treatment for reduced friction
• 118-degree standard point angle with web-thinned, tapered-web geometry for reduced thrust
• Two-flute regular spiral design promotes consistent chip evacuation in steel and cast iron
• Straight-cylindrical shank (6.90 mm) fits standard drill chucks without adapters
• Diameter tolerance held to +0.000 to -0.022 mm for repeatable hole sizing

Compatibility

Designed as an OEM-style general-purpose jobber drill for use in standard drill presses, hand drills, and CNC machining centers accepting a straight-cylindrical shank. Rated for cast iron and steel workpiece materials per GUHRING material codes K and P.

Installation Notes

Installation and use should be performed by qualified machinists or trade professionals familiar with rotating cutting tools. Secure the shank fully in the drill chuck and verify runout before beginning. Always wear appropriate eye protection and secure the workpiece before drilling. Consult applicable shop safety standards and tool manufacturer guidelines when selecting feed rate and spindle speed for the workpiece material.