Threading die set DORMER L111NO3 for external threads M10–M25 (round die, adjustable)

DORMER L111NO3 is a round, adjustable threading die engineered for cutting and restoring external metric threads from M10 to M25. Intended for use with compatible die stocks or holders, this die delivers controlled material removal to produce accurate external threads in steel and similar metals. Its adjustable design allows minor size correction for thread repair and fine-tuning during fabrication or maintenance tasks.

Advantages

The adjustable round-die design enables precise control of thread fit and compensates for minor deviations in workpiece diameter. Manufactured to workshop standards, the die offers consistent cutting performance on steel and similar ferrous materials. Its compatibility with standard die stocks ensures straightforward setup, and the construction provides durability for repeated use in both shop and field environments.

Suitable for

• Repairing worn or damaged external metric threads (M10–M25)
• Creating new external threads on shafts and rods made of steel or similar metals
• Maintenance and fabrication tasks in workshops and on-site service operations
• Adjusting thread fit for assemblies requiring precise external thread dimensions

Key specifications

• Thread form: Metric external threads from M10 to M25
• Die type: Round, adjustable
• Material compatibility: Steel and similar ferrous metals
• Usage: For use with standard die stocks or holders
• Function: Cutting and restoring external threads with adjustable fit control

How to use

Secure the round die in an appropriate die stock or holder, ensuring the adjustable screws or clamping mechanism are accessible for fine adjustment. Prepare the workpiece by deburring the end of the rod or shaft and applying suitable cutting lubricant. Start the die square to the workpiece and apply steady, even pressure while turning; reverse periodically to break chips and clear swarf. Use the adjustment feature to fine-tune the die opening for the desired thread fit, then complete the cut and clean the threads before assembly.

Usage recommendations

Use appropriate cutting oil for steel, maintain correct alignment between die and workpiece, and avoid excessive feed force to extend die life. Inspect threads after cutting and perform final cleaning to remove chips and lubricant. For hardened or non-ferrous materials, verify material suitability before cutting.