Guhring 9029220028450 Spiral Flute Tap 4-40 Unc Tialn

Product Description

The GUHRING 9029220028450 is a spiral flute tap designed for blind hole threading in 4-40 UNC thread form. Built from powdered metal and finished with a TiAlN coating, it is engineered for threading in nickel and other difficult-to-machine materials. The modified bottoming chamfer allows threading close to the bottom of a blind hole, making it a practical choice for tight-tolerance fastener applications. Three right-hand flutes with a 10-degree helix angle and slow flute style help evacuate chips efficiently in short, interrupted cuts. This tap is used by machinists and tool-room professionals working in precision metal fabrication.

The 9029220028450 is suited for blind hole threading operations in nickel and similarly tough alloys where tool wear and chip control are primary concerns. The 2BX class of fit produces threads slightly oversize to accommodate plating or coating buildup after threading. With a shank diameter of approximately 0.138 inches, an overall length of approximately 2.205 inches, and a neck length of approximately 0.709 inches, it fits standard tap holders used in CNC machining centers and manual tapping arms. Coolant-through capability is not included in this design.

Key Features

• 4-40 UNC thread form with modified bottoming chamfer for threading near the base of blind holes
• TiAlN coating provides heat resistance and extended tool life in nickel and hard alloys
• Powdered metal construction delivers consistent hardness and wear resistance throughout the tool body
• 2BX class of fit produces oversized threads suitable for post-threading plating or coating processes
• Three right-hand spiral flutes at a 10-degree helix angle support controlled chip evacuation in blind hole applications
• Right-hand thread direction, compatible with standard tapping attachments and CNC rigid tapping cycles

Compatibility

Designed for blind hole threading in nickel and comparable hard-to-machine materials using 4-40 UNC thread form. Part of GUHRING Series 2922.

Installation Notes

Installation should be performed by a qualified machinist familiar with tapping operations in hard alloys. Power down and lock out any machine tool before loading or changing the tap. Use a calibrated tap holder or floating collet to minimize side load and prevent tap breakage in small-diameter threads. Follow the machine manufacturer and tooling guidelines for spindle speed and feed rate when setting up rigid tapping cycles.