HEY No. 3 Automatic Facing and Centering Machine: Operating and Maintenance Manual. Includes a copy of the Technical Sales and Specification Catalogue.

HEY No. 3 Automatic Facing & Centering Machine: Equipment for Short Work - Supplementary publication.

Hey No. 3 Automatic Facing and Centering Machine: Detailed Manual of Standard Tooling to Inch Standard with clear illustrations.

HEY 10-inch Gear Tooth Rounding and Chamfering Machine. Operating and Maintenance Manual.

HEY 20-inch Gear Tooth Rounding and Chamfering Machine. Operator's Instruction Manual; two Manuals in one.

HEY 18A Gear Burring Machine. Operator's Instruction and Maintenance Manual.