Balax 12687-010 Thread Forming Tap 1/4-20 Unc 2B Bottoming

Product Description

The BALAX 12687-010 is a thread forming tap in the BXOTL series, designed for producing internal threads in blind holes without cutting chips. Made from high-speed steel with a bright uncoated finish, this bottoming-style tap generates threads by displacing material rather than removing it, resulting in stronger thread forms and no chip evacuation concerns. It handles 1/4-20 UNC threads to a Class 2B fit with an H7 thread limit. The 1.5P chamfer length and 1.0 inch tapping depth make it well suited for close-tolerance blind-hole work in production and maintenance environments. Machinists and maintenance technicians use this tap in manual and CNC tapping operations.

The BALAX 12687-010 is intended for blind hole threading applications where chip buildup would create a problem. Its right-hand thread direction and standard 1/4-20 UNC profile make it a practical choice for general metalworking, light fabrication, and repair operations. The H7 thread limit supports consistent fit across multiple passes and tooling setups. This tap is appropriate for use in ductile metals and other materials well suited to forming rather than cutting operations.

Key Features

• Thread forming design displaces material without cutting chips, reducing breakage risk in blind holes
• 1/4-20 UNC thread profile with Class 2B fit and H7 thread limit
• Bottoming chamfer with 1.5P chamfered threads for threading close to the bottom of a blind hole
• 1.0 inch tapping depth with 0.79 inch thread length
• Single oil groove supports lubrication during the forming process
• High-speed steel construction with bright uncoated finish

Compatibility

Designed for blind hole threading operations requiring a 1/4-20 UNC, Class 2B internal thread form in materials suitable for cold forming.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which is typically larger than a standard cutting tap drill - consult a thread forming tap drill chart before drilling. Use a suitable tapping fluid or cutting oil to reduce forming torque and extend tool life. Secure the workpiece firmly and ensure the tap is driven straight and square to the hole axis. Do not exceed the recommended tapping depth for the tool.