Balax 10243-010 Thread Forming Tap 1-72 Unf Bottoming Hss

Product Description

The BALAX 10243-010 is a thread forming tap designed for cutting 1-72 UNF internal threads in blind hole applications. Unlike cutting taps, thread forming taps cold-form the thread profile without producing chips, making them well suited for ductile materials where chip evacuation is a concern. This tap is built from high-speed steel with a bright uncoated finish and carries a Thread Limit of H3. It is used by machinists, tool and die makers, and maintenance technicians working on precision small-diameter threaded assemblies.

This tap is intended for blind hole threading in small-diameter fastener applications, particularly where a 1-72 UNF thread form is required. The bottoming chamfer style, with 2.5 chamfered threads, allows threading close to the bottom of a blind hole. It fits the BXB series and is appropriate for use in light-gauge metal components, electronic hardware, and instrument assembly where fine-thread engagement is critical.

Key Features

• Thread forming design cold-forms threads without producing chips, reducing breakage risk in small-diameter work
• Bottoming chamfer with 2.5 chamfered threads allows threading close to the bottom of a blind hole
• High-speed steel construction provides durability across a range of ductile workpiece materials
• H3 thread limit ensures consistent fit within Class 2B and 3B tolerance ranges
• Right-hand thread direction with no oil grooves for straightforward application in standard setups
• Compact overall length of 1.6875 inches suits confined workspaces and small machine setups

Compatibility

Designed as an OEM-style replacement or direct-use thread forming tap for applications requiring a 1-72 UNF Class 2B or 3B internal thread in blind hole configurations.

Installation Notes

Thread forming taps require a specific tap drill size matched to the desired thread form percentage - consult a forming tap drill chart before selecting the drill diameter. Use a suitable tapping fluid or cutting oil rated for the workpiece material to reduce forming forces and extend tap life. Always secure the workpiece and use a properly sized tap wrench or CNC holder to maintain axial alignment and prevent tap breakage on this small diameter. Ensure the machine or tool is fully de-energized and the workpiece is fixtured securely before beginning the tapping operation.