Collis Tool 70304 Standard Tapping Driver MT3 Taper Shank

Product Description

The COLLIS TOOL 70304 is a standard tapping driver designed for use with a 1-1/8 inch tap in machine tool applications. It features an MT3 (Morse Taper 3) taper shank for secure mounting in compatible spindles, with a 1-3/4 inch tap entry depth and a 2-5/16 inch projection from the shank face. The tap shank diameter is 0.896 inches, and the tap shank square measures 0.672 inches, ensuring positive drive engagement. Machinists and tool and die professionals use this driver to maintain accurate tap alignment and consistent depth during tapping operations on drill presses, mills, or tapping machines.

This tapping driver is suited for production and job-shop environments where reliable, repeatable tapping of threaded holes is required. The MT3 shank interface fits a wide range of machine tool spindles commonly found in vertical mills and drill presses. The driver accommodates the specified tap shank dimensions and is appropriate for ferrous and non-ferrous workpieces where controlled tapping depth is critical to part quality.

Key Features

• MT3 taper shank provides rigid, self-holding fit in compatible machine spindles
• 1-3/4 inch tap entry depth accommodates a range of through-hole and blind-hole applications
• 2-5/16 inch projection allows clearance between spindle and workpiece surface
• 0.896 inch tap shank diameter and 0.672 inch tap shank square for positive rotational drive
• Designed for standard tapping operations on drill presses, vertical mills, and dedicated tapping machines

Compatibility

Designed as an OEM-style replacement or direct-fit tapping driver for machine tool spindles accepting an MT3 taper shank interface and accommodating a 1-1/8 inch tap with a 0.896 inch shank diameter and 0.672 inch shank square.

Installation Notes

Installation should be performed by a qualified machinist following standard machine tool setup procedures. Power down and lock out the machine before inserting or removing the taper shank driver from the spindle. Clean the MT3 taper surfaces on both the driver and the spindle socket before seating to ensure full contact and prevent fretting. Follow applicable shop safety standards and machine manufacturer guidelines for tool retention and speed selection.