Guhring 9055120111100 Taper Length Drill Bit 0.4375 in

Product Description

The GUHRING 9055120111100 is a solid carbide taper length drill bit engineered for demanding metal-cutting applications. It features a 0.4375 inch (7/16 inch) diameter with a 140-degree split-point (SU) tip that promotes self-centering without a center punch. The spiral flute geometry is web-thinned and runs at a 7xD flute-to-diameter ratio, delivering chip evacuation suited to deep-hole work. Coolant-through capability keeps cutting temperatures in check during prolonged cuts in tough materials. The straight shank measures 0.4724 inch in diameter and accepts standard drill chucks or collet holders. Licensed machinists, tool-and-die techs, and maintenance professionals install this bit for precision drilling in production and job-shop environments.

This drill bit is designed for use in materials that challenge standard high-speed steel tooling. Listed material applications include brass, cast iron, hardened materials, nickel alloy, stainless steel, steel, and titanium alloy. The coated carbide substrate and web-thinned tapered-web geometry extend tool life in interrupted cuts and abrasive workpieces. Typical use cases include CNC machining centers, drill presses, and manual milling machines where consistent hole tolerance is required. Maximum drilling depth reaches 3.832 inches (97.34 mm), making it suitable for through-holes in medium-thickness stock as well as stepped drilling operations.

Key Features

• Solid submicron carbide construction for rigidity and wear resistance in hard and abrasive materials
• 140-degree SU split-point promotes self-centering and reduces thrust force at entry
• Coolant-through design channels fluid directly to the cutting edge for thermal management in deep holes
• Web-thinned tapered web reduces walking and improves chip flow
• 7xD flute length ratio supports drilling depths up to 3.832 inches without retracting for chip clearance
• Conforms to DIN 6537 standard for taper length drills

Compatibility

Designed as a Series 5512 OEM-specification solid carbide taper length drill bit per DIN 6537, compatible with standard straight-shank drill chucks and ER collet systems sized for a 0.4724 inch shank diameter.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the straight shank in a properly sized chuck or collet holder, verifying runout with an indicator before production use. Confirm that the machine spindle speed and feed rate match the recommendations for the workpiece material and coolant-through pressure before engaging the cut. Do not use this bit in hand-held drills; it is intended for rigid machine-tool setups only.