Collis Tool 78911 Tapping Adapter Size 1 Through Coolant

Product Description

The COLLIS TOOL 78911 is a size 1 tapping adapter designed for use with quick-change tooling systems in CNC and production tapping applications. It accepts taps with a shank diameter of 0.141 inches and a tap square size of 0.110 inches, and supports through-coolant delivery to flush chips and manage heat at the cutting zone. The adapter features a flange diameter of 1.180 inches and a tap depth of 0.850 inches, providing secure tap retention with defined projection of 0.280 inches. Licensed machinists and tool-room technicians install this type of adapter as part of a modular quick-change tapping setup on machining centers and drill presses.

This adapter is suited for production environments where tap changes must be made quickly without removing the holder from the spindle. The through-coolant feature makes it appropriate for blind-hole and deep-hole tapping where chip evacuation is critical. It is compatible with quick-change tapping systems that accept size 1 adapters and is typically used in light-duty tapping operations on ferrous and non-ferrous materials in both job-shop and high-volume manufacturing settings.

Key Features

• Size 1 tapping adapter for quick-change tooling systems
• Through-coolant capable for chip flushing and heat control during tapping
• Tap shank diameter: 0.141 inches
• Tap square size: 0.110 inches for positive drive engagement
• Projection of 0.280 inches and tap depth of 0.850 inches for controlled reach
• Flange diameter of 1.180 inches for stable seating in the holder body

Compatibility

Designed for use with quick-change tapping systems that accept size 1 adapters with a 0.141-inch tap shank diameter and a 0.110-inch tap square size.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the spindle drive before installing or removing the adapter. Ensure the adapter seating surfaces are clean and free of chips or burrs before engagement. Verify through-coolant port alignment with the machine spindle coolant supply before running production.