TOS OF71 Gear Hobber: Operator's Instruction & Maintenance Manual (available in both English and German). Includes detailed installation and operating instructions, technical descriptions, maintenance and adjustment procedures, indexing change-gear charts, differential change-gear charts, instructions for setting change of indexing shifter, reversing of table rotation shifter,etc) tables of change-gears for cutting spur gears with elementary number of teeth, independently of feed, etc. Also included are two separate supplimentary Manuals: "Automatic Indexing Attachment" and "Hobbing Carriage With Automatic Axial Traverse of Tool with Electrohydraulic Drive".