Union Twist Drill & Tool Company side and face milling cutter manufactured in Athol, Massachusetts, USA. Cutter is constructed from high speed steel and designed for use on horizontal milling machines for slotting, side milling, and general machining operations.

Cutter features arbor-mounted design with keyed center bore and precision ground cutting teeth. Marked 6” x 7/8” x 1-1/4”, indicating cutter diameter, cutter width, and arbor bore size.

Union Twist Drill & Tool Co. was a well-known American manufacturer of industrial cutting tools widely used in machine shops and manufacturing environments.

Specifications include:

• Manufacturer: Union Twist Drill & Tool Co., Athol, Massachusetts, USA

• Material: High Speed Steel (HSS)

• Diameter: 6 in.

• Width: 7/8 in.

• Arbor Bore: 1-1/4 in. keyed

• Type: Side and face milling cutter

• Designed for horizontal milling machines

• Heavy industrial construction

Removed from a working machine shop environment.