LK 300 - 500 / 700 M | Gear skiving machine

LK 300 - 500 / 700 M

New dimensions

Highlights

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Module - 8.00 mm
8.00 mm
Workpiece diameter - 300 - 700 mm
300 - 700 mm

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Maximum flexibility

- Enlarged work area

- NC counter column for long shafts

- FlexChamfer: the most flexible chamfering solution on the market

Maximized productivity

- Fast axis movements thanks to optimized drive design

- Very short setup times thanks to Liebherrs clamping fixture quick change

Improved ergonomics

- Fold-out steps for easy access

- Optimum accessibility for maintenance work

- Ergonomic machine operation thanks to LHStation and LHMobile

Machine concept

Increased efficiency thanks to gear skiving

Gear manufacturers are seeking alternative processes that are more productive and cost-effective than the gear shaping method and more flexible than broaching.

Successful gear skiving by means of:

Machine
Tool
Process

The foundation for successful gear skiving is the rigidity of the machine: The cast iron machine bed absorbs the occurring process forces. In the machining head, a high spindle rigidity is achieved by means of a special bearing concept, which means that longer tool holders can also be used. This is particularly important for machining internal gears.

In combination with a burst-proof housing, the machine is suitable for both dry and wet machining with oil or emulsion.

In addition to the machine, the appropriate tool is crucial for a stable process. Our in-house tool development and manufacturing enables us to design the optimal tool for every workpiece assuming that the theory of skiving has been absorbed and understood.

The planned process must be taken into account when designing tools. Our intensive technological development and extensive tests on customer projects have given us a complete understanding of gear skiving and, with Skiving³, we offer a complete solution consisting of machine, tool and process.

The tailstock makes the machine suitable not only for external and internal gears but also for shafts.

Axes

Additional functions

Automatic workpiece change

The new NC ringloader is now available for a fast and automatic workpiece change. Shafts and wheels with a maximum workpiece weight of up to 100 kg can be loaded and unloaded fully automatically using this automation variant adapted to gear skiving.

For a matching external automation system, Liebherr offers additional customized solutions such as robot loading or workpiece feed using plastic chain or hinged chain conveyors.

Wet machining

With internal gear, wet machining is advantageous because the meshed blades are cooled and lubricated, which reduces the thermal load on the tools. Another reason is that chips that form are perfectly removed, which prevents them from being drawn into the running process. Optimum chip removal significantly increases the gear and surface quality.

Coolant nozzles quick change concept

With its innovative coolant nozzle design, Liebherr provides customers with the unique ability to have a specific coolant nozzle available for each workpiece. This way, complex adjustment work during the setup process can be significantly reduced and the process is far more stable. The coolant nozzle set is changed using a quick-change clamping fixture.

Deburring

As with every machining process, burrs result from tool runout. To remove these quickly and cost-effectively, Liebherr offers an adaptable turning tool on the gear skiving head. Using the turning tool and the corresponding software, these burrs can be removed without problems. The tip diameter can also be turned in the same machining step.

Centering a gear

A centering process is necessary for position dependency or hard machining. For this, Liebherr offers a simple solution by means of a meshing sensor on the gear skiving head. Customized solutions can be developed as needed.

The highest precision in gear skiving: LK 700 M manual gear skiving machine

The Liebherr LK 700 M offers maximum flexibility and efficiency for small batch sizes as a manual gear skiving machine, making it ideal for job shop operations and specialized gear manufacturers. Designed for workpieces up to 700 mm in diameter, it combines precise skiving technology with simple, ergonomic handling. Thanks to the NC controlled, swivelable tailstock, manual loading is significantly easier, while the large L door provides optimal accessibility and convenient crane loading from above.

The LK series delivers advanced gear skiving performance with optimized tooling, collision safe operation, and outstanding accuracy for internal and external gearing.

Maximized operator friendliness

The new optimized control panel LHStation & LHMobile

With the control panel, Liebherr intelligently divides 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 setup. Both units have a multi-touch surface as well as tactile elements for optimum operating speed and operating safety.

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Advantages of Skiving³

Machine

Rigid machine design
Ringloader concept for fast workpiece change
Tailstock for shaft machining and optimum workpiece clamping
Optional chamfering during the machining process

Tool

Design and manufacturing of conical and cylindrical skiving wheels
Process-optimized tool design
Tools in PM-HSS & carbide versions

Process

Process analysis and simulation for optimal cutting conditions
Application technology for optimal customer support
Collision analysis with calculation software

Hard skiving: an alternative to grinding or honing

The hard skiving process opens up new possibilities for hard-fine machining of internal gears and splines that are difficult, unproductive or impossible to achieve using processes such as grinding or honing. It allows targeted compensation of hardening distortion, offers impressive flexibility, tool life and cost efficiency, and can be used on gear skiving machines from Liebherr-Verzahntechnik GmbH with a simple tool change.

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Technical data

Module	8.00 mm
Workpiece weight	100 kg
Axial travel	700 mm
Shift distance	470 mm
Swivel angle of gear skiving head	30 °
Max. spindle power	27 kW
Hob speed	2,500 min-1
Tool diameter	250 mm

Variants

productOrderInquiryTableCaption
Variants	LK 300	LK 300 DC	LK 500	LK 500 DC	LK 700 M
Workpiece diameter (mm)	300	300	500	500	700
Table speed (min-1)	750 / 1,000 / 1,500	750 / 1,000 / 1,500	750 / 1,000 / 1,500	750 / 1,000 / 1,500	1,000 / 750

Tool and technology competence

Interaction of tool, technology and machine: Skiving³

Field tests have clearly shown that the key to success is mathematical and technical control of the tools and the process, as well as coordination of the technology to the tool and machine. This has been proven in various applications during customer trials.

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Liebherrs in-house tool production

Liebherr offers a comprehensive range of gear cutting tools, many years of experience in gear manufacturing, and the highest level of product quality down to the smallest detail. Our gear skiving tools are manufactured at our sites in Ettlingen, Germany and Collegno, Italy.

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