Emuge CU94C400.5015 Spiral Flute Tap 5/8-11 Unc Cobalt

Product Description

The EMUGE CU94C400.5015 is a spiral flute tap designed for blind hole threading in a wide range of metallic materials. Built from cobalt high-speed steel and finished with a GLT-1 coating, this tap handles demanding threading applications where conventional tooling falls short. It carries a 5/8-11 UNC thread form, a 2B class of fit, and a 45-degree helix angle that efficiently evacuates chips up and out of the hole during cutting. With four fast-style flutes and a modified bottoming chamfer, it threads close to the bottom of blind holes without sacrificing tool life. Licensed machinists and tool-and-die professionals are the primary users of this tap.

This tap belongs to the EMUGE Enorm series, a line engineered for high-performance tapping across both CNC and manual machine setups. It is suited for blind hole threading in aluminum alloy, copper, copper alloy, stainless steel, and steel. The coolant-through design makes it especially practical in CNC machining centers where through-spindle coolant is available, helping to manage heat and chip evacuation at higher feed rates. Right-hand flute direction and right-hand thread orientation are standard for conventional threading operations.

Key Features

• Modified bottoming chamfer allows threading close to the bottom of blind holes
• 45-degree helix angle with fast flute style promotes efficient chip evacuation in spiral flute blind hole applications
• Cobalt HSS construction provides heat resistance and durability in tough materials including stainless steel
• GLT-1 finish reduces friction and built-up edge on non-ferrous and ferrous workpieces
• Coolant-through design compatible with through-spindle coolant delivery
• 2B class of fit meets standard UNC tolerance requirements for general mechanical assemblies

Compatibility

Rated for use in aluminum alloy, copper, copper alloy, stainless steel, and steel workpieces. Designed for blind hole threading applications in the 5/8-11 UNC thread standard with a 2B class of fit.

Installation Notes

Installation of this tap is performed by machinists and tooling technicians operating CNC machining centers or manual tapping equipment. Ensure the spindle and workpiece are properly secured and that the correct tap drill size for 5/8-11 UNC is used before tapping. When using coolant-through capability, verify that coolant pressure and flow are compatible with the machine spindle. Do not exceed the recommended feed rate for the workpiece material, and back the tap out periodically if chip packing is observed in non-through-coolant setups.