ARCO tapping die M8 x 57 mm, combi/hand tool for thread cutting

ARCO tapping die M8 x 57 mm is a combi-style hand tool designed to cut or repair external M8 threads on bolts, studs and rod ends. The tool’s 57 mm length and combi construction make it suitable for use with manual holders and provide a balance between cutting reach and control. It is intended for metalworking and maintenance tasks where accurate thread formation or restoration is required.

Advantages

The combi design allows cutting and finishing of external threads with a single die, reducing tool changes during manual operations. Its hand-tool format is optimized for use with appropriate holders to provide consistent alignment and stable cutting. Constructed for workshop and field use, the die offers wear resistance and dimensional stability to maintain thread accuracy over multiple operations.

Suitable for

• Cutting new M8 external threads on rods and bolts
• Repairing damaged or worn M8 threads on studs and fasteners
• Maintenance and repair work in workshops and on-site service
• General metalworking tasks requiring manual thread formation

Key specifications

• Thread size: M8 (metric external thread)
• Overall length: 57 mm
• Type: combi/hand tapping die for external threads
• Intended use: manual operation with suitable die-holder
• Application materials: steel alloys, common ferrous metals and other machinable metals

How to use

Mount the tapping die securely in a compatible die holder designed for combi dies. Ensure the workpiece and die are aligned coaxially to avoid cross-threading. For cutting new threads, start the die square to the workpiece and apply steady, even pressure while turning the holder; periodically reverse the die slightly to clear chips. For thread repair, position the die over the damaged area and proceed slowly to follow the existing thread path, checking engagement frequently. Use cutting fluid suitable for the workpiece material to reduce friction and improve finish.

Usage recommendations

Inspect the die before use for signs of wear or damage and replace if cutting edges are rounded. Select an appropriate die-holder and apply cutting lubricant when working with harder alloys. For best thread accuracy, clamp the workpiece securely and maintain consistent feed; avoid excessive force to prevent tool or workpiece damage.