Collis Tool 70404 Standard Tapping Driver MT4 Taper Shank

Product Description

The COLLIS TOOL 70404 is a standard tapping driver designed to hold and drive taps in machining and metalworking operations. Built with an MT4 taper shank, this driver mounts directly into compatible taper-shank machine spindles, providing a secure and concentric drive connection. It accepts a 1-1/8 inch tap with a tap shank diameter of 0.896 inches and a tap shank square of 0.672 inches. The tap entry depth is 1-3/4 inches, and the projection measures 2-3/8 inches. Machinists and toolroom technicians use this driver in drill presses, milling machines, and machining centers where rigid tapping or hand-over-tapping operations are performed.

This tapping driver is suited for production and maintenance machining environments where standard-geometry taps need a reliable drive interface. The MT4 taper shank fits the spindle bores of many common drill presses and vertical mills found in job shops, toolrooms, and manufacturing facilities. It is appropriate for use with right-hand taps in through-hole and blind-hole applications in ferrous and non-ferrous materials. The 1-3/4 inch entry depth accommodates the tap shank securely before engagement begins.

Key Features

• MT4 taper shank mounts directly into MT4-bore machine spindles for a rigid, concentric drive connection
• Accepts 1-1/8 inch taps with a 0.896 inch tap shank diameter
• Tap shank square of 0.672 inches ensures positive rotational drive without slippage
• 1-3/4 inch tap entry depth provides full engagement of the tap shank
• 2-3/8 inch projection positions the tap at working depth below the spindle face
• Weighs 2.45 pounds, indicating solid, durable construction suitable for repeated shop use

Compatibility

Designed as an OEM-style tapping driver for use with 1-1/8 inch taps on machines equipped with an MT4 taper-bore spindle.

Installation Notes

Installation is performed by machinists or toolroom technicians familiar with taper-shank tooling. Before mounting or removing the driver, power down the machine and confirm the spindle is fully stopped. Clean the MT4 taper and spindle bore with a lint-free cloth before seating to ensure proper contact and prevent runout. Use a drawbar or drift where required by the machine design; never strike the taper shank directly with a steel hammer.