Guhring 9005020063500 Extra Length Drill Bit 0.25in Hss

Product Description

The GUHRING 9005020063500 is an extra length, two-flute high speed steel drill bit engineered for deep hole drilling applications. It carries a 0.25 inch (1/4 inch) diameter with a 130-degree point angle and a parabolic flute geometry that promotes efficient chip evacuation at extended depths. The straight-cylindrical shank measures 0.25 inches in diameter. Overall length is 8.465 inches, with a flute length of 5.906 inches and a maximum drilling depth of 5.531 inches. The uncoated HSS construction is produced to DIN 1869 standards, placing this bit in the high-performance grade category. Licensed HVAC, plumbing, or industrial tradespeople installing through deep structural members will find this bit suited to the task.

This drill bit is designed primarily for deep hole drilling in aluminum and similar non-ferrous and low-alloy materials, consistent with its K, N, and P workpiece material classifications under DIN designation. The parabolic flute profile and web-thinned, tapered web construction reduce thrust and improve chip flow in through-holes and blind holes where standard-length bits cannot reach. It is well suited for use in drill presses, CNC machines, and handheld drills where extended reach into panels, castings, or structural stock is required. The 15xD flute-to-diameter ratio confirms its classification as a true extra-length bit, not simply an extended jobber.

Key Features

• Parabolic flute geometry with web thinning for improved chip evacuation in deep holes
• 130-degree split point reduces walking and lowers entry thrust
• DIN 1869 standard construction ensures consistent dimensional tolerances
• Diameter tolerance held to +0.000 to -0.022 mm for close-fit hole requirements
• Straight-cylindrical shank seats securely in standard 1/4 inch collets and keyless chucks
• Uncoated HSS construction allows easy resharpening in the field

Compatibility

Designed as an OEM-style replacement or direct-use extra length drill bit conforming to DIN 1869, Series 502, suitable for use in standard 1/4 inch drill chucks and collet holders on handheld and machine tools.

Installation Notes

This bit is installed by a machinist, maintenance technician, or trade professional using a compatible chuck or collet rated for 1/4 inch straight-cylindrical shanks. Ensure the drill is powered down and the chuck is fully tightened before operation. For deep hole work, use appropriate cutting fluid or lubrication for the workpiece material and retract the bit periodically to clear chips. Follow applicable workplace safety standards for rotating tooling and eye protection.