Balax 11627-01T Thread Forming Tap 8-32 Unc Bottoming Hss

Product Description

The BALAX 11627-01T is a thread forming tap designed for producing 8-32 UNC internal threads without cutting or removing material. Instead of cutting, it displaces metal to form the thread profile, resulting in stronger threads and no chips to clear. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, it handles the friction and heat generated during form tapping. The bottoming chamfer with 2.5 chamfered threads allows threading close to the bottom of a blind hole. Overall length is 2.125 inches with a tapping depth of 0.75 inches. Thread limit is H7, suitable for standard tolerance fits. This tap is used by machinists and maintenance technicians in metalworking and mechanical assembly operations.

This tap is suited for blind hole threading in ductile and malleable materials such as aluminum, brass, and mild steel. The BXB series bottoming design lets it reach near the full depth of a blind hole, making it a practical choice for close-tolerance fastener applications in manufacturing, HVAC equipment fabrication, electrical enclosure assembly, and general mechanical trade work. The single oil groove aids lubrication distribution during the forming process. Right-hand thread direction is standard for conventional tap wrench or CNC tapping operations.

Key Features

• Thread forming design eliminates chips, reducing blind hole tap breakage risk
• TiN coating improves surface hardness and extends tool life in abrasive materials
• Bottoming chamfer (2.5P) allows threading to within a few threads of hole bottom
• H7 thread limit for standard tolerance internal thread fits
• High-speed steel construction handles interrupted cuts and moderate speeds
• Single oil groove supports lubrication during forming operation

Compatibility

Designed for blind hole threading applications requiring 8-32 UNC right-hand threads in ductile metals. Fits standard tap holders, tap wrenches, and CNC tapping chucks sized for a 0.168-inch shank diameter.

Installation Notes

Thread forming taps require a specific drill size larger than a standard cut tap pilot hole - consult a form tap drill chart for the correct 8-32 UNC form tap drill diameter before drilling. Apply cutting or tapping fluid rated for the workpiece material before and during tapping to reduce galling and extend tap life. Secure the workpiece fully before tapping and ensure the tap enters the hole square to avoid thread distortion or tap breakage. This tool is intended for use by trained machinists or trade professionals familiar with tapping operations.