Collis Tool 70302 Standard Tapping Driver MT3 Taper Shank

Product Description

The COLLIS TOOL 70302 is a standard tapping driver designed for use with a 7/8 inch tap and a Morse Taper 3 (MT3) taper shank. It accepts taps with a 1-1/2 inch tap entry depth and features a 2-5/16 inch projection from the taper nose. The tap shank diameter is 0.697 inches and the tap shank square measures 0.523 inches. This driver is used in milling machines and drill presses where the spindle accepts an MT3 taper, allowing machinists and toolroom professionals to thread holes with a standard floating or rigid tap holder setup.

The COLLIS TOOL 70302 is suited for metalworking applications in machine shops, production environments, and maintenance facilities. It is compatible with MT3 spindle tooling setups and is installed by machinists or tool and die professionals performing tapping operations on ferrous and non-ferrous materials. The driver accommodates standard tap shank geometry and provides consistent tap alignment during through-hole and blind-hole threading operations.

Key Features

• MT3 taper shank for direct spindle mounting on compatible machine tools
• Accepts 7/8 inch taps with standard shank geometry
• 1-1/2 inch tap entry depth for positive tap engagement
• 2-5/16 inch projection provides clearance for workholding setups
• 0.523 inch tap shank square for positive drive transmission
• 0.697 inch tap shank diameter for secure tap retention

Compatibility

Designed as an OEM-style tapping driver for machine tool spindles with an MT3 taper bore accepting standard 7/8 inch tap shank geometry.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the machine spindle before seating or removing the taper shank driver. Clean the MT3 taper bore and the driver shank thoroughly before insertion to ensure full contact and prevent fretting. Follow the machine manufacturer and applicable shop safety guidelines when setting up tapping operations.