Parlec 7717-075 Tapping Adapter 3/4 Inch Pipe

Product Description

The PARLEC 7717-075 is a tapping adapter designed for 3/4 inch pipe tap sizes, built as part of the NUMERTAP 770 Series. It accepts a tap shank diameter of 0.906 inches and a tap square size of 0.679 inches, with a quick-change interface that allows fast tap swaps during production or maintenance operations. The outside shank diameter measures 1.25 inches and the projection is 2.25 inches. This adapter is installed by machinists and tool-room technicians working with tapping heads on CNC machining centers, drill presses, and similar equipment where consistent thread quality is required.

This adapter is suited for applications requiring 3/4 inch pipe thread tapping in metalworking environments, both production and job-shop settings. The NUMERTAP 770 Series is a recognized quick-change tapping system, and this adapter interfaces with compatible 770 Series holders to maintain alignment and torque transfer during tapping cycles. It is appropriate for use in residential and commercial plumbing-component manufacturing, industrial fluid-system fabrication, or any operation producing NPT-threaded pipe connections at this size.

Key Features

• Accepts 3/4 inch pipe tap size with 0.906 inch tap shank diameter
• Tap square size of 0.679 inches for secure positive drive
• Quick-change design enables fast tap replacement without removing the holder
• Outside shank diameter of 1.25 inches for stable seating in the tapping head
• 2.25 inch projection provides clearance for a range of workpiece configurations
• Part of the NUMERTAP 770 Series for system-level compatibility

Compatibility

Designed for use with PARLEC NUMERTAP 770 Series tapping heads and holders that accept the corresponding outside shank diameter and quick-change interface.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Before mounting or changing adapters, ensure the machine spindle is fully stopped and all power is isolated per shop lockout/tagout procedures. Verify that the tap shank diameter and square size match the tap being used before engaging the quick-change mechanism. Inspect the adapter seating surfaces for wear or contamination prior to each use to maintain thread quality and prevent tap breakage.