Guhring 9006590091300 Cobalt Screw Machine Drill Bit

Product Description

The GUHRING 9006590091300 is a cobalt screw machine length (stub) drill bit designed for high-performance drilling in tough materials, including titanium alloy and other hard metals. It measures 23/64 inch (0.3594 inches) in diameter with an overall length of 3.3071 inches. The 130-degree split point and parabolic flute geometry reduce thrust, improve chip evacuation, and help maintain accuracy in demanding production drilling environments. Web thinning further reduces entry resistance. This bit is suited for machinists, tool-and-die technicians, and production floor operators who need consistent, repeatable results in difficult workpiece materials.

This drill bit is built for use in CNC machining centers, drill presses, and screw machine setups where stub-length rigidity is required. The shorter flute length of 40 millimeters and straight-cylindrical shank allow secure chuck engagement with minimal runout. Primary workpiece material is titanium alloy, though the heavy-duty cobalt construction also handles stainless steel and other abrasion-resistant alloys. It conforms to DIN 1897 specification, making it compatible with tooling standards common in aerospace, automotive, and precision manufacturing environments. Sold individually, with a minimum order quantity of 5 units.

Key Features

• Cobalt construction rated for heavy-duty use in titanium alloy and hard metals
• 130-degree drill point angle reduces thrust and improves hole entry accuracy
• Parabolic flute design promotes efficient chip evacuation at higher feed rates
• Web-thinned, parallel web configuration lowers cutting resistance
• Stub length provides added rigidity over jobber-length bits in short-reach applications
• Conforms to DIN 1897 specification with a diameter tolerance of +0.000 to -0.022 mm

Compatibility

Designed as a DIN 1897 stub-length replacement drill bit for use in standard straight-shank chucks and collet holders accepting a 0.3594-inch shank diameter. Compatible with CNC and manual drilling equipment configured for screw machine length tooling in Series 659.

Installation Notes

Installation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet. Verify chuck runout is within acceptable tolerance before drilling, as excessive runout accelerates wear on cobalt tooling. Do not exceed the rated maximum drilling depth of 1.036 inches per pass without retracting to clear chips.