Emuge BU306011.5003 Spiral Flute Tap 4-40 Unc Cobalt

Product Description

The EMUGE BU306011.5003 is a spiral flute tap designed for threading 4-40 UNC holes in titanium and other difficult-to-machine materials. It features a plug chamfer, 2 left-hand spiral flutes with a 15-degree helix angle, and a cobalt substrate with a nitride coating for extended tool life in demanding applications. The overall length is 2.205 inches, with a thread length of 0.433 inches and a tapping depth of 0.709 inches. This tap belongs to the Rekord C-Ti series, which is purpose-built for titanium machining. It is suited for use by machinists and tooling professionals working in precision manufacturing environments.

This tap is intended for right-hand threaded 4-40 UNC applications in titanium workpieces, though the cobalt construction and nitride coating also support use in other tough alloys. The plug chamfer provides a gradual lead-in appropriate for through-hole and blind-hole applications where entry conditions are controlled. The slow flute style and left-hand spiral help evacuate chips upward out of the hole during the tapping cycle, reducing the risk of chip packing in deep or blind bores.

Key Features

• 4-40 UNC thread size with right-hand thread direction
• 2 left-hand spiral flutes at a 15-degree helix angle for upward chip evacuation
• Cobalt substrate with nitride coating for heat and wear resistance in titanium
• Plug chamfer for controlled lead-in in through-hole and blind-hole applications
• 3BX class of fit for close-tolerance threading requirements
• Rekord C-Ti series construction optimized for titanium material applications

Compatibility

Designed for threading 4-40 UNC holes in titanium, consistent with the Rekord C-Ti series material application designation. Suitable for precision machining operations where a 3BX class of fit is required.

Installation Notes

This tap should be installed in a rigid or floating tap holder appropriate for the machine spindle in use. Power down and lock out the machine before changing tooling. Use cutting fluid or coolant rated for titanium when tapping to manage heat buildup; note that this tap does not support coolant-through delivery. Follow shop-standard speeds and feeds for cobalt taps in titanium to avoid premature wear or breakage.