Guhring 9003170080000 Taper Length Drill Bit 8mm Cobalt

Product Description

The GUHRING 9003170080000 is a taper length twist drill bit engineered for extended-reach drilling in metal and hard materials. Built to DIN 340 standards, it is manufactured from M35-grade cobalt high-speed steel, which provides heat and wear resistance in demanding cut conditions. The bit features a 118-degree cone relief point, a web-thinned tip for reduced thrust and easier starting, and a right-hand spiral flute for efficient chip evacuation. It is sized at 8 mm (0.3150 inches) in diameter with a cylindrical shank of equal 8 mm diameter and a shank diameter tolerance of h8. This drill is used by machinists and maintenance technicians working on ferrous metals, stainless steel, and similar materials where a standard-length bit lacks the reach required.

The 9003170080000 belongs to GUHRING Series 317 and is designed for taper length applications where deeper hole production is required in a single pass. With a flute length of 109 mm and an overall length of 165 mm, it supports a maximum drilling depth of 97 mm. The 10xD flute-to-diameter ratio makes it well suited for through-holes and deeper bores in structural plate, machine frames, and fabrication work. It operates without coolant-through capability and is intended for use in drill presses, CNC machining centers, and manual machines running appropriate feeds and speeds for cobalt tooling.

Key Features

• M35 cobalt HSS construction for improved heat resistance and tool life in hard materials
• 118-degree cone relief point with web thinning for reduced entry thrust and accurate starting
• Taper length body at 165 mm OAL with 109 mm flute length for extended-reach drilling
• Regular spiral right-hand flute geometry for effective chip removal
• Cylindrical shank with h8 diameter tolerance for consistent chuck fit
• Manufactured to DIN 340 standard for dimensional reliability

Compatibility

Designed as an OEM-style taper length drill bit for use in standard cylindrical-shank drill chucks and collet holders accepting an 8 mm shank, compatible with drill presses, machining centers, and hand-held drilling equipment set up for cobalt HSS tooling.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tooling technicians familiar with feeds, speeds, and clamping requirements for cobalt HSS drills. Ensure the machine spindle and chuck are fully powered down and locked out before inserting or removing the bit. Secure the cylindrical shank fully within the chuck or collet to the correct engagement depth before operation. Do not exceed the rated maximum drilling depth of 97 mm per pass without retracting to clear chips.