Until a few years ago, clamping devices for gear manufacturing machining were manufactured individually. This meant that if anything broke, the machine stood still for a long time – depending on the supplier’s capacity – since there were no standardized spare parts.

For the team led by Dieter Lange, Head of Order Construction, this was an untenable situation: “We wanted a solution which would reduce customer downtimes as far as possible. With SECLA, we have developed a solution with defined interfaces which is always available in stock at a consistent quality, and can be delivered correspondingly quickly, and which is suitable for all Liebherr technologies.” The greatest challenge for development was the large range of technologies: the clamping arbor supports dry and wet machining, permits every conceivable interfering contour and nonetheless demonstrates very high rigidity.

A very high concentricity enables us to achieve a new dimension of gear quality.

Florian Schmölz, Project Manager
With SECLA, Liebherr is setting a new standard in clamping technology
With SECLA, Liebherr is setting a new standard in clamping technology

High quality and service life

The project began four years ago with the initial desire for a standardized main body. However, in the course of development, an even greater amount of standardization was achieved. Defined interfaces simplify tooling and retooling. Numerous experiments, from material analyses to strain and endurance tests, successfully proved the quality and durability of the clamping unit. “A very high concentricity enables us to achieve a new dimension of gear quality,” reports project manager Florian Schmölz. Older machines and machines made by other manufacturers can also be equipped with the new SECLA. “This innovation can therefore be deployed very flexibly.”

Your advantages

- Short delivery times

- Independent of all gear cutting processes

- Suitable for hard and soft machining

- Dry and wet use possible

- Simple and fast retooling

- Large clamping area

- Excellent machining quality

- Integrated rinsing solution

Well thought-out details

“Then there are a number of functionalities which we have developed over the years in various special solutions,” adds Stefan Breyer, a member of the clamping device development team. The constructive details include the perfected integrated rinsing solution (from size 3). This enables the clamping device to be permanently cooled by air or oil and cleaned at the same time. Both these things ensure that it will work well over a longer service life. The slender design and intelligent geometry make SECLA suitable for a maximum range of applications, without any loss of rigidity. It enables hobbing, shaping, skiving, grinding and ChamferCut processes in one clamping fixture – and for a majority of common gear sizes.

  • Optional: upper mounting for counter column

  • Optional: clamping cone

  • Clamping element (segment clamping bushing and tension adapter)

  • Test workpiece

  • Workpiece support

  • Workpiece support

  • Protective cover

  • Clamping base for table interface

SECLA segment clamping arbor in figures

  • Ten sizes for 20 to 200 millimeters bore diameter
  • Rinsing channels from size 3
  • Concentricity up to 5 micrometers
  • At least 250,000 clamping cycles