Guhring 9003360087300 Taper Length Drill Bit 0.3438 in

Product Description

The GUHRING 9003360087300 is a taper length cobalt drill bit designed for demanding drilling applications in ferrous and hard-to-machine materials. Built to DIN 340 standards, this high-performance bit features an 11/32-inch (0.3438 inch) diameter with a 130-degree split point and a parabolic flute geometry that promotes efficient chip evacuation and reduced thrust. The cylindrical shank fits standard drill chucks and milling machine spindles. Licensed HVAC, plumbing, and electrical contractors as well as machinists and maintenance trades rely on cobalt tooling like this when working through hardened fasteners, structural steel, stainless fixtures, and cast iron pump housings where high-speed steel bits fall short.

This bit is suited for drilling cast iron, hardened materials, stainless steel, and carbon steel in both shop and field environments. The 10xD flute-length-to-diameter ratio and parabolic flute design allow for deeper cuts with fewer peck cycles compared to standard jobber-length bits. The web-thinned, parallel web construction reduces the chisel edge load at entry, making it appropriate for hand-held drill motors, drill presses, and CNC machining centers where consistent hole quality is required.

Key Features

• Cobalt tool material rated for high-performance drilling in hardened and abrasion-resistant workpieces
• 130-degree standard point angle optimized for self-centering entry on flat and curved surfaces
• Parabolic flute geometry promotes fast chip removal and reduces heat buildup at depth
• Web-thinned parallel web reduces drill entry force and chisel edge wear
• DIN 340 taper length body provides extra reach compared to jobber-length bits at the same diameter
• Right-hand cut, cylindrical shank fits standard 3-jaw chucks without adapters

Compatibility

Designed as an OEM-matched replacement or direct addition for tooling setups requiring DIN 340 Series 336 taper length cobalt drill bits in 11/32-inch diameter. Rated for use in cast iron, hardened materials, stainless steel, and steel applications.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tradespeople familiar with rotary cutting tool safety. Always secure the workpiece and verify chuck runout before beginning a drilling operation. Power down and de-energize or lock out the drilling machine before changing bits. Do not exceed the recommended speed and feed parameters for cobalt tooling in the target material to avoid premature edge wear or bit breakage.