Collis Tool 78912 Tapping Adapter Size 1

Product Description

The COLLIS TOOL 78912 is a tapping adapter designed for use with quick-change tooling systems in machining and tapping operations. It accepts a tap shank diameter of 0.168 inches and a tap square size of 0.131 inches, corresponding to a Size 1 tap adapter configuration. The adapter features through-coolant capability, allowing coolant to flow directly to the tap for improved chip evacuation and tool life during production tapping. It is a precision tooling component installed by machinists and tool room technicians on CNC machining centers and tapping machines.

This adapter is suited for light-duty tapping applications where Size 1 tap holders are specified. The through-coolant design makes it appropriate for applications requiring consistent coolant delivery at the cutting zone, particularly in production environments where tap life and cycle times are critical. The quick-change feature allows rapid tap swaps without removing the holder from the spindle, reducing changeover time on the machine.

Key Features

• Size 1 tap adapter with 0.168-inch tap shank diameter
• Tap square size of 0.131 inches for positive drive engagement
• Through-coolant design for direct coolant delivery to the cutting tool
• Quick-change compatible for fast tap exchanges at the spindle
• Projection of 0.28 inches and tap depth of 0.92 inches
• Flange diameter of 1.18 inches

Compatibility

Designed for use with quick-change tapping tooling systems that accept Size 1 tap adapters with a 0.168-inch shank diameter and 0.131-inch tap square.

Installation Notes

Installation is performed by a qualified machinist or tooling technician. Ensure the spindle and tooling system are fully powered down and the machine is in a safe state before changing adapters. Confirm the tap shank diameter and square size match this adapter before seating the tap to avoid damage to the drive mechanism. Verify coolant line connections are secure if through-coolant is active in the machine setup.