Collis Tool 75869 End Mill Holder 6MT Taper Shank 2 in

Product Description

The COLLIS TOOL 75869 is a Morse taper end mill holder designed to secure end mills in milling machines and machining centers. The holder features a 6MT taper shank that seats directly into the machine spindle and provides a 2-inch bore for tooling. With a projection of 4.8125 inches and a nose diameter of 3.75 inches, this holder positions the cutting tool at a consistent, rigid standoff from the spindle face. It is installed and used by machinists and toolroom technicians working on vertical or horizontal milling operations that require a positive, repeatable tool-holding solution without through-coolant.

This holder is suited for heavy-duty milling operations where a large-bore 2-inch tool shank must be driven by a 6MT taper spindle. Typical applications include production milling, die work, and toolroom setups on knee mills, vertical machining centers, and horizontal spindle equipment configured with a 6 Morse taper. The large nose diameter and extended projection accommodate face mills, shell mills, and large-diameter end mills that require solid, low-runout retention. No through-coolant path is present, so flood or mist coolant should be directed externally at the cut zone.

Key Features

• 6MT taper shank seats directly into compatible machine spindles for rigid tool holding
• 2-inch bore diameter accommodates large-shank end mills and shell mill arbors
• 4.8125-inch projection provides extended reach from the spindle face
• 3.75-inch nose diameter supports large-diameter cutter bodies
• No through-coolant design - external coolant application required
• Solid construction at 19.3 pounds ensures mass and rigidity during heavy cuts

Compatibility

Designed for use with milling machines and machining centers equipped with a 6 Morse taper spindle bore and requiring a 2-inch straight-bore end mill holder.

Installation Notes

Installation is performed by qualified machinists or toolroom personnel. Power down and lock out the machine spindle before seating or removing the holder. The taper surfaces of both the holder shank and the spindle bore must be clean, dry, and free of nicks or burrs before assembly to ensure full taper contact and prevent fretting. Verify draw bar engagement per the machine manufacturer's procedure before returning the spindle to service.