Balax 11665-010 Thread Forming Tap 8-32 Unc 2B Bottoming

Product Description

The BALAX 11665-010 is a thread forming tap designed for cutting 8-32 UNC internal threads in blind hole applications. Unlike cutting taps, thread forming taps displace material rather than remove it, producing stronger threads with no chips to clear. This tap is made from high-speed steel with a bright uncoated finish and is configured with a bottoming chamfer of 1.5 threads, allowing it to form threads close to the bottom of a blind hole. It carries a 2B class of fit and H5 thread limit, making it suitable for standard UNC threaded fastener assemblies. Licensed machinists, tool and die makers, and maintenance technicians are the typical installers.

This tap is built for blind hole threading in metal components where chip evacuation is a concern and thread strength is a priority. The bottoming chamfer configuration is well suited for shallow blind holes that require threads to start near the base. With an overall length of 2.125 inches and a thread length of 0.47 inches, it fits standard tap holders used in manual and machine tapping operations across job shop, production, and MRO environments.

Key Features

• Thread forming design displaces material instead of cutting, eliminating chips in blind holes
• Bottoming chamfer with 1.5 chamfered threads for threading close to hole bottom
• H5 thread limit and 2B class of fit for standard UNC fastener compatibility
• High-speed steel construction with bright uncoated finish
• Single oil groove design supports lubrication during the forming process
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed as an OEM-style replacement or direct-use tap for blind hole threading operations requiring 8-32 UNC threads at a 2B class of fit with H5 thread limit.

Installation Notes

Thread forming taps require a specific tap drill size larger than that used for cutting taps - consult a thread forming drill chart for the correct hole diameter before tapping. Use a suitable tapping fluid or cutting oil to reduce forming pressure and extend tool life. This tap should be installed in a tap holder that provides proper alignment to avoid thread distortion or tap breakage. Always secure the workpiece before tapping and apply consistent, steady pressure throughout the stroke.