Collis Tool 70305 Standard Tapping Driver MT3 Taper Shank

Product Description

The COLLIS TOOL 70305 is a standard tapping driver designed to hold and drive taps in machining and fabrication applications. It features an MT3 taper shank for secure mounting in compatible spindles and machine tool holders. The driver accommodates a 1-1/4 inch tap with a tap entry depth of 2.19 inches and a projection of 2-15/16 inches. The tap shank diameter measures 1.021 inches, with a tap shank square of 0.766 inches. This tool is installed by machinists and tool-and-die professionals working with milling machines, drill presses, and lathes where tapping operations require a positive-drive holder.

The COLLIS TOOL 70305 is suited for production and job-shop tapping operations where repeatable tap engagement and secure drive are required. It is commonly used in vertical milling machines and drill presses with MT3-compatible spindles. The MT3 taper shank provides positive seating without the need for a drawbar in most applications, making it well suited for manual and semi-automatic tapping cycles in both ferrous and non-ferrous material work.

Key Features

• MT3 taper shank for direct spindle mounting in compatible machine tools
• Accommodates 1-1/4 inch taps with 1.021 inch shank diameter
• 2.19 inch tap entry depth for deep-reach tapping applications
• 2-15/16 inch projection for clearance in standard work setups
• Tap shank square of 0.766 inches provides positive rotational drive
• Single-piece construction for consistent tap alignment and reduced runout

Compatibility

Designed as an OEM-style tapping driver for use in machine tool spindles with an MT3 Morse taper bore, compatible with 1-1/4 inch taps having a 1.021 inch shank diameter and 0.766 inch square drive.

Installation Notes

Installation is performed by machinists and machine tool operators. Before mounting, power down and lock out the machine spindle per applicable OSHA lockout/tagout procedures. Clean the taper shank and spindle bore thoroughly before seating to ensure full contact and accurate alignment. Do not use excessive force to seat the taper; a firm hand press or soft mallet tap against a clean bore is the standard practice for MT-shank tools.