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 an elementary number of teeth, independently of feed, etc. Also included is a separate supplementary Manual: "Hobbing Carriage With Automatic Axial Traverse of Tool with Electro-hydraulic Drive".