The Machine Concept In gear manufacturing, the technology of high-speed dry hobbing has substantially reduced cutting times and machining costs while increasing workpiece quality and environmental protection. Originally introduced by Liebherr, this process has met with tremendous success. The new demands of this modern technology include higher hob and table speeds, reliable removal of the hot chips, and machine-wide management of the considerable process heat. The proven machine concept also offers a number of significant new developments: the completely symmetrical design of the machine’s structural...

The Machine Bed The rigidity of the machine structure was optimized using FEA simulation. Steep side walls and two integrated chip augers offer efficient and reliable chip removal. This is especially important for dry cutting. The Hob Head A maintenance free direct drive AC motor is used for the hob spindle. Drive power up to 27 kW and speeds up to 3000 rpm offer large reserve capacity for future tool developments. For very high torque requirements the hob head is equipped with a reduction gear drive. The tool interface is offered either with a hollow shaft taper (HSK), a collet or a steep taper...

The Controls – Intelligence from Experience In standard, the machines are delivered with Siemenscontrol in connection with Siemens-drives. The essential features of these advanced controls are: • PC based control technology • digital drive technology • integrated PLC • advanced field bus systems (profi bus) • TFT flat screen • optional network integration • dialog input tailored to gear machining • Teleservice • Diagnostic tools With these customer-oriented options, we satisfy the demands of the international markets. Versatile Workpiece Handling The tailstock column enables manual and automatic...

Technical Data Max. workpiece diameter Max. axial travel Table diameter Table speed Center Distance between hob and table Hob-head swivel Shift 200 mm Hob-head swivel Shift 300 mm Max. shift/tangential travel Max. hob diameter Max. hob length Axial rapid travel Radial rapid travel Tangential rapid travel Hob-spindle speed ranges Cutter-spindle drive capacity Total weight of machine with tailstock column Total connected load

Machine Tools and Automation Systems by Liebherr With around sixty years of experience in the field, Liebherr is one of the world‘s leading manufacturers of CNC gear cutting machines, gear cutting tools and automation systems. These innovative products are the result of advanced ideas, highly qualified employees and the latest manufacturing systems at each of their locations. They are characterised by economy, ease of use, quality and reliability in combination with a high degree of flexibility. Liebherr employs approximately 1,200 people in the field of machine tools and automation technology...