Powerful and uncompromising

The powerful HH 240 hob head enables workpieces up to a module of 12 mm to be machined. With different gear rations, up to 3000 RPM are possible. Due to the large travel range of the counter bearing, very long or, if necessary, relatively short tools can be used. As standard, even hobs with a maximum diameter of 240 mm can now be accommodated.

The hob head with a range-change gearbox is exceptionally well suited for particularly high torque requirements. Using different gear ratios, the optimum configuration for your requirements can be found.

Drive power (kw): 27
Max. module (mm): 12 / 12 / 9 / 3.5
Speed (rpm): 600 / 900 / 1500 / 3000
Gear ratios: 12 / 8 / 5 / 2,5

Optionally, the hob head can be equipped with a meshing/positioning device or a swiveling probe for gear check.

Dry machining in perfection

Special attention was paid to perfected dry machining during the development of the new machine generation. Thanks to the design-optimized machine bed, chips can be removed even better. In addition, essential components such as the machine table, the machine bed, the machine column and the flat guides have been covered with stainless steel covers so hot chips have no influence on the temperature behavior. This guarantees constant temperature behavior and has a significant effect on gear quality and process stability.

The new optimized control panel, LHStation & LHMobile

With the control panel, Liebherr is intelligently dividing the programming and operation of the machine between two system parts: The large, fixed monitor unit LHStation for data input and process monitoring and the standardized, mobile handheld terminal LHMobile with context-sensitive user guidance during set-up. Both units have a multi-touch surface as well as tactile elements for optimum operating speed and operating safety.

Mobile handheld unit LHMobile

• 10-inch multi-touch as standard
• Context-sensitive views such as PLC/NC keys and program statuses
• Wired signal transmission for maximum safety

The programming system by Liebherr: 25% faster set-up time

With the LHGearTec software, the system constantly guides users when entering workpiece and tool data, as well as during workpiece correction and process monitoring. The user guidance was redefined in intensive cooperation with designers and users.

Weitere Infos

Easy to maintain

Optimum machine accessibility during maintenance work is a prerequisite for ensuring productivity. For this purpose, all necessary maintenance access points are equipped with doors. Moreover, to enable quick and easy additional monitoring of specific statuses, window panes are inserted into the maintenance doors. This means the machine operator or maintenance personnel can read the signals from outside in very little time. An enclosure for the hydraulics has also been integrated into the new machine design. This ensures sustainable reductions to hydraulic power unit noise.

LC 300 / 500 DC with integrated ChamferCut device

With the LC 300/500 DC, the ChamferCut device is integrated on the operator side. This device has been enhanced in terms of user-friendliness. As such, the machine operator has unobstructed accessibility to both machining positions. Chip removal has also been significantly improved. Using the proven Liebherr ringloader concept, the workpiece can be transferred quickly and efficiently between the gear hobbing and chamfering machining positions. Chamfering by ChamferCut or FlexChamfer therefore takes place parallel to gear hobbing. The special feature of the chamfering unit is that it is controlled using 6 CNC axes as standard. Set-up or corrections and adjustments for varying flank corrections can be executed quickly and easily using the user-friendly software.

The chamfering parallel to machining has once again been improved in the overhauled machine series for gear hobbing. Perfect chip removal is now provided and chip deposits can be virtually eliminated.