Parlec 7717-025 Tapping Adapter 1/4 Inch Pipe

Product Description

The PARLEC 7717-025 is a tapping adapter designed to hold 1/4 inch pipe taps in rigid or floating tap holders used in CNC machining centers and tapping machines. It accepts a tap shank diameter of 0.562 inches and a tap square size of 0.421 inches, providing a secure, positive drive connection to the tap. The 7717-025 is part of the NUMERTAP 770 series, which is engineered for precision tapping applications where repeatability and concentricity are critical. Machinists and toolroom technicians install this adapter when setting up pipe thread tapping operations on production or job-shop equipment.

This adapter is suited for pipe tapping applications in both production machining and maintenance environments. It is used in setups requiring 1/4 inch pipe thread formation in metal workpieces, including ferrous and non-ferrous materials. The quick-change feature allows for fast tap exchanges without removing the holder from the spindle, reducing changeover time in high-mix or repetitive tapping operations. It is a direct-fit component within the NUMERTAP 770 system.

Key Features

• Accepts 1/4 inch pipe tap shank diameter of 0.562 inches
• Tap square size of 0.421 inches for positive rotational drive
• Quick-change design enables fast tap swaps without spindle removal
• Outside shank diameter of 1.25 inches for holder interface
• Projection of 0.700 inches for controlled tap reach
• Part of the NUMERTAP 770 series for system compatibility

Compatibility

Designed for use within the PARLEC NUMERTAP 770 series tapping system. Compatible with holders and tooling configured for a 1.25 inch outside shank diameter and the NUMERTAP 770 quick-change interface.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before inserting or removing the tapping adapter. Verify that the tap shank and square dimensions match the adapter specifications before assembly. Follow the machine tool and tooling manufacturer guidelines for torque and clamping procedures applicable to your specific holder model.