Collis Tool 70307 Standard Tapping Driver MT3 Taper Shank

Product Description

The COLLIS TOOL 70307 is a standard tapping driver with an MT3 taper shank, designed for use in drill presses, milling machines, and machining centers where controlled tapping operations are required. The driver accepts a 1-1/2 inch tap with a tap shank diameter of 1.233 inches and a tap shank square of 0.925 inches. Tap entry depth is 2.31 inches, with a projection of 2-15/16 inches. Weighing 2.51 pounds, this is a solid, production-grade toolholder suited for machine shops and maintenance facilities running tapping operations on ferrous and non-ferrous materials.

The 70307 is used in manual and CNC machining environments where a Morse Taper 3 spindle is present. It is a typical toolholder choice for knee mills, drill presses, and radial arm drill setups. Machinists and tool-and-die technicians install this driver when tapping larger-diameter threads that require a rigid shank connection and precise tap alignment. It is appropriate for both production tapping runs and single-operation maintenance work.

Key Features

• MT3 taper shank provides a secure, self-holding fit in compatible machine spindles
• Accepts 1-1/2 inch taps with a 1.233 inch tap shank diameter
• Tap shank square of 0.925 inches ensures positive rotational drive without slipping
• 2.31 inch tap entry depth accommodates standard tap geometry for larger thread sizes
• 2-15/16 inch projection provides adequate clearance for most workholding setups
• Weighs 2.51 pounds, reflecting robust construction for production use

Compatibility

Designed as an OEM-style tapping driver for machine spindles fitted with a Morse Taper 3 socket, compatible with 1-1/2 inch taps having a 1.233 inch shank diameter and 0.925 inch shank square.

Installation Notes

Installation is performed by a machinist or tool-and-die technician. Power down and lock out the machine before inserting or removing the taper shank driver from the spindle. Clean the MT3 taper and spindle socket thoroughly before seating to ensure full contact and proper alignment. Never force the tap into the driver square pocket; verify shank square dimensions match before assembly.