Thread Tap Holder STAHLWILLE 77390002 for M5–M12 taps

STAHLWILLE thread tap holder 77390002 is an accessory for manual tapping that holds hand taps with nominal sizes from M5 to M12. Designed for use in workshops and service environments, the holder secures the tap to improve alignment and control during the cutting of internal threads in metal and other materials. The tool is compatible with standard hand taps in the specified size range and intended to provide a repeatable grip for manual threading operations.

Advantages

The holder provides a firm and concentric grip on hand taps, reducing wobble and improving thread quality. Its construction is intended to withstand workshop use and to facilitate quick tap changes while keeping the tool aligned with the workpiece. By stabilizing the tap, the holder can contribute to more consistent thread geometry and reduced risk of tap breakage during manual operation.

Suitable for

• Manual internal threading in metal components
• Workshop and service repair stations
• Prototyping and small-series mechanical assembly
• Maintenance tasks requiring controlled tap alignment

Key specifications

• Accepts hand taps in the M5 to M12 nominal size range
• Designed for manual tapping operations
• Provides concentric clamping to improve alignment
• Durable construction suitable for regular workshop use

How to use

Inspect the tap holder and selected hand tap for damage or wear before use. Insert the hand tap into the holder and secure it according to the holder's clamping mechanism, ensuring the tap is centered and perpendicular to the holder axis. Position the tap and holder over the pre-drilled hole, apply cutting fluid if appropriate for the material, and turn the tap by hand with steady, controlled motion. Reverse periodically to break chips and clear the cut threads. After tapping, remove the tap from the holder and clean both components to remove metal shavings.

Usage recommendations

Use appropriate cutting fluid for the workpiece material, maintain steady axial pressure, and avoid excessive torque to reduce the risk of tap breakage. Regularly inspect and clean the holder to ensure reliable clamping and alignment.