Collis Tool 70409 Standard Tapping Driver MT4 Taper Shank

Product Description

The COLLIS TOOL 70409 is a standard tapping driver designed for use with MT4 taper shank tooling in drilling and tapping operations. This driver accepts a 1.75-inch tap and provides a tap entry depth of 2.38 inches, making it suited for threading operations that require stable shank engagement and consistent torque transfer. The tap shank diameter measures 1.43 inches with a tap shank square of 1.072 inches. A projection of 3.25 inches positions the tap at the correct working depth. Machinists and tool and die professionals install this driver in milling machines and drill presses equipped with MT4 spindle receivers.

This tapping driver is used in machine shop environments where MT4 taper shanks are the standard spindle interface. It is appropriate for both production and job-shop threading applications on ferrous and non-ferrous materials. The driver accommodates standard square-drive taps, making it a straightforward fit for facilities already running MT4-compatible tooling setups. It is not limited to a single machine platform and can be applied across any equipment accepting the MT4 standard taper.

Key Features

• MT4 taper shank provides rigid, self-centering fit in compatible spindles
• Accepts 1.75-inch taps with a 2.38-inch tap entry depth
• Tap shank square of 1.072 inches ensures positive drive engagement
• 3.25-inch projection positions tap accurately at working depth
• 1.43-inch tap shank diameter suits standard production tap sizes

Compatibility

Designed as an OEM-style replacement and standard fitment for machine tools equipped with an MT4 taper spindle interface requiring a standard square-drive tapping driver.

Installation Notes

Installation and removal should be performed by a qualified machinist with the machine fully powered down and the spindle locked. The MT4 taper shank must be clean and free of burrs or debris before seating to ensure full contact and prevent fretting. Use a drawbar or drift as appropriate to your machine type when securing or releasing the taper. Follow applicable shop safety procedures and machine manufacturer guidelines during tooling changes.