Threading die M8x1.25 mm, No name, model 47050 — external thread cutter for M8×1.25

External threading die M8x1.25 mm, model 47050, is a compact hand tool designed to cut or restore external metric threads with an 8 mm major diameter and 1.25 mm pitch. Intended for use on rods, bolts and studs, this external thread cutter provides a simple mechanical method to form accurate threads in workshop, maintenance or light metalworking environments. The tool is suitable for manual operation and for preparing threaded parts for fasteners, repairs and refitting tasks.

Advantages

The threading die offers a straightforward, toolroom-style solution for producing consistent M8×1.25 external threads. Its compact size makes it convenient to carry and position on workpieces where space is limited. The design provides stable thread profile formation and is compatible with standard die stocks and handles for controlled cutting action. As a dedicated M8×1.25 die, it reduces the need for thread chasing files or improvised threading methods.

Suitable for

• Cutting new external M8×1.25 threads on round rods and bolts
• Restoring damaged or corroded external threads on studs and fasteners
• Workshop maintenance and light fabrication tasks requiring metric threads
• Preparing bolts or shafts for assembly with M8×1.25 nuts and components

Key specifications

• Thread size: M8 (8 mm nominal diameter)
• Thread pitch: 1.25 mm (metric fine pitch)
• Application: external thread cutting and repair
• Form factor: round threading die compatible with standard die stocks
• Operation: manual hand tool for use with die holders/handles

How to use

Select a suitable die stock or holder that matches the die's form factor and secure the die in the holder according to the holder manufacturer's instructions. Clamp the workpiece firmly in a vise or fixture and ensure the shank is aligned and supported to prevent bending. If cutting a new thread, turn down the rod to the recommended pre-thread diameter for M8×1.25 and chamfer the leading edge. Apply cutting lubricant to the workpiece and start the die square to the workpiece, turning it slowly with steady pressure to engage the material. Advance the die a few turns, then reverse slightly to break chips and prevent jamming. Continue cutting until the required thread length is achieved, periodically applying lubricant and removing chips. Clean the freshly cut thread and check fit with a mating nut or gauge.

Usage recommendations

Use appropriate cutting lubricant for steel or the material being threaded, maintain alignment between die and workpiece, and protect cutting edges by storing the die in a dry, clean place when not in use. For damaged threads, remove burrs and corrosion before rethreading and consider using progressive passes with light cuts to restore the profile accurately.