Balax 18610-010 Thread Forming Tap M8 X 1.25 D10 Hss

Product Description

The BALAX 18610-010 is a thread forming extension tap designed for cutting metric coarse internal threads in ductile materials without producing chips. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, this tap features an M8 x 1.25 thread size, a D10 thread limit, and a 6H class of fit. The bottoming chamfer allows threading close to the bottom of blind holes. At 6 inches overall length, it provides the reach needed for deep or recessed workpieces where a standard-length tap cannot access the thread start. Machinists and tool-and-die professionals rely on thread forming taps for superior thread strength and longer tool life compared to cut taps.

This extension tap is suited for production and maintenance machining operations involving ductile metals such as aluminum, copper, and low-carbon steel. The right-hand thread direction and right-hand flute direction make it compatible with standard tapping operations on manual machines, CNC machining centers, and drill presses. The 6-inch overall length makes it particularly useful for threading recessed bores, deep cavities, or workpieces mounted in fixtures that restrict standard tool access.

Key Features

• Thread forming design produces no chips, reducing clogging risk in blind holes
• M8 x 1.25 metric coarse thread with D10 thread limit and 6H class of fit
• Bottoming chamfer for threading to the base of blind holes
• 6 inches overall length provides extended reach for deep or obstructed bores
• 1.125 inches thread length with a 3/8-inch square drive end
• High-speed steel construction for durability across ductile workpiece materials

Compatibility

Designed as an OEM-style replacement or direct addition for tooling setups requiring an M8 x 1.25 metric coarse thread forming tap with a D10 thread limit and 6H class of fit in a bottoming, extended-length configuration.

Installation Notes

Thread forming taps require the correct pilot hole diameter for the specific material and thread size - consult a thread forming tap drill chart before drilling. Adequate lubrication or cutting fluid is essential to prevent galling and extend tool life. Secure the tap in a properly sized tap holder or chuck that engages the 3/8-inch square drive end. Always advance and reverse with controlled torque to avoid tap breakage, especially in blind holes.