Round Die DIN 223 (DIN EN 22568) HSS - UNF 1" x 12 LH

• Use for external thread cutting on rods, studs, and similar cylindrical workpieces.
• Use in repair work to restore damaged external threads when sufficient base material is available.
• Use in workshop setups with a suitable die holder or fixture that keeps the die square to the workpiece.
• Process: manual driving or assisted driving depending on your holder and machine setup
• Use: thread cutting, re tapping, and thread cleaning depending on condition

Note Prepare a lead in on the workpiece to support clean entry and reduced risk of cross threading.

• Useful for restoring slightly damaged external threads when the workpiece allows a clean pass.
• Compact round die format fits common die holders for manual or guided external threading.
• Made from HSS according to the title for general purpose threading applications.
• Helps produce repeatable threads for repair parts and small series work.

• Limited in hardened, highly abrasive, or scale covered materials where cutting edges wear quickly.
• Manual external threading is slower and more sensitive to alignment than dedicated machine threading.

1. Confirm the thread system and nominal size in the product title against your drawing and mating part.
2. Prepare the workpiece diameter and add a small chamfer as a lead in for clean entry.
3. Clamp the workpiece securely and keep the threading zone accessible and stable.
4. Mount the die in a suitable holder and align it square to the workpiece axis.
5. Apply a cutting fluid suitable for the workpiece material and the die material.
6. Start the thread with gentle pressure and maintain alignment through the first turns.
7. Reverse slightly at intervals to reduce cutting load and clear chips from the cutting edges.
8. Continue to the required thread length and then remove the die while keeping alignment.
9. Clean the thread and protect the die before storage.

Scope of supply is defined by your order confirmation and delivery note.

• Product type: Round die
• Thread system: UNF
• Standard: DIN 223
• Material: HSS
• Tolerance class: 2A

What is the main difference between a round die and a threading insert on a machine

A round die is a compact hand or fixture tool for external threading, while machine threading inserts are set up in dedicated holders with controlled feed. A die is practical for repair and small batch work where setup time must stay low.

Where can you find setup and handling notes for round dies

Use the technical information for round dies for general setup guidance and terminology. Technical information round dies as PDF

Which tolerance class is typical for external threads cut with dies

External thread tools are often used to produce the usual fit class for the thread system. If your drawing specifies a special fit, select a dedicated tolerance execution rather than a general purpose die.

What holder type do you typically use with a round die

Use a suitable die holder or die stock that clamps the die securely and keeps it square to the workpiece axis. Stable guidance supports better flank quality than high force.

How do you assign inch based thread designations to workshop documentation

Use a conversion reference to map inch designations consistently across drawings and process sheets. Inch to mm conversion table as PDF

When is a round die not the right tool choice

It is not the right choice for highly hardened, scale covered, or abrasive materials where edge wear accelerates. It is also not ideal when you need high output with tight process control that requires machine threading.

Where can you find additional product information and selection tables

Use the product catalog for overview and related external threading tools. VD 23 catalog as PDF