PM-HSS and carbide skiving cutters

• Tools made of powder-metallurgical high speed steel (PM-HSS) are inexpensive to purchase, but are more prone to wear.
• Due to the raw material and manufacturing process, tools made of solid carbide are more expensive to purchase and recondition. Because they are relatively expensive, using them is only worthwhile for high production numbers or higher-strength materials.

Conical and cylindrical tools have different axis alignments. The relief angle of a conical skiving tool is determined by its design and is usually centered, while a cylindrical skiving tool requires additional tilting or an off-centered position. The control system of the Liebherr gear skiving machines (LK) controls both tool types.

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

Optimal tool design

• Ideal technological design for every gear
• Accurate profile calculation taking account of the crossed axis angle and cutting face offset
• Avoidance of collisions especially for internal gears
• Optimal cutting and clearance angles for the entire process

• Two to five times faster than gear shaping
• One to two quality grades better than gear shaping
• Excellent single indexing quality at the workpiece
• Tool life similar to gear shaping
• Available tool designs: conical and cylindrical
• Process-optimized tool design
• Tools available in PM-HSS and carbide (also with indexable inserts)
• Dry skiving possible
• Pressure angle and lead modification possible

The wafer cutter is a coated disposable tool that represents the optimum tool condition comparable to a non-helical shaper cutter. The thin, coated wafer disc is clamped in a special wafer holder and mounted just like a shaper cutter on the shaper cutter holder of the shaping machine.

• Maximum process reliability, since process parameters are fixed
• Economical in series production
• No wear-related profile changes on the workpiece, since the tool is not resharpened
• Very simple machine adjustment (reduced setup time)
• Always fully coated tools in use
• Machine does not need to be adjusted after wafer change during one lot of workpieces

Solid wafer cutters are used when a constant workpiece profile is required, thus reducing the usable tool height. Solid wafer cutters are available for any kind of spur or helical gear, with the optimum coating for each application. The solid wafer cutter has the same advantages as the wafer cutter even when used for smaller batch sizes.

In special cases solid wafer cutters can also be manufactured with different teeth for up-shaping and/or down-shaping processes.

Master gears are manufactured up to quality level 3 as per DIN 3962 and are supplied with a test certificate.

The following gauge types are available:

• Master gears
• Plug gauges
• Ring gauges

Plug and ring gauges can be supplied as Go and No Go gauges.

Liebherr after-sales service offers sharpening and coating of gear tools. Our satisfied customers are happy to use this well-established service.

You can rely on the experience of the tool manufacturer for sharpening and coating your tools.

ISO 9001:2015

Our high quality standards prompted us to implement the international standards for quality management systems in our tool manufacturing as long ago as the 1990s. The benefits of this can be seen in the high degree of customer satisfaction and are highlighted by the success of our products in the market. Therefore, our goal is to continually improve our quality management system.

Highly qualified specialists will recondition your grinding tools at our in-house electroplating shop.

After the tools are inspected, the tool body is ground if necessary, all in a very short time and at an attractive price. Thorough quality control at every process step ensures consistently high tool quality.