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Swiss gear specialist Christ & Heiri relies on FANUC-controlled CNC gear hobbing machines to deliver maximum qualityTask: To reequip a factory with CNC gear hobbing machines capable of meeting Christ & Heiri’s extremely high standards and guaranteeing maximum customer satisfaction. The machines require a control that is easy to program and ideally suited to sophisticated gear, sprocket and worm machining processes.Solution: Install FANUC-controlled Monnier + Zahner machines to produce tens of millions gear wheels, sprockets and worms in diameters ranging from 0.5 to 40 mm every year.Result: The company’s 24 Monnier + Zahner gear hobbing machines run round the clock, seven days a week. Programming is straightforward thanks to Monnier + Zahner’s increasing use of FANUC controls with Panel i to complement the CNC. This enabled the company to use its own PC-based software to develop a unique dialogue interface that is touch-screen operated.Another key function to benefit production is FANUC’s Electronic Gear Box (EGB), which precisely angles the tool and workpiece in a highly-precise transformation ratio.

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High-quality thanks to qualified employees and modern machine and control technologyAnyone supplying the automobile industry must guarantee the highest quality of components and prompt delivery. A showcase company in this regard is the gear specialist Christ & Heiri, guaranteeing utmost customer satisfaction due to its vast expertise and FANUC-controlled gear hobbing machines from Monnier + Zahner.Christ & Heiri AG in Selzach near Solothurn (Switzerland) is an exemplary company, right down to the details. Modern, automated CNC gear hobbing machines are lined up in a row on a spotless workshop floor. Chips and lubricants are disposed of by means of a duct system in the facility ceiling, and centrally processed. Modern measuring and inspection equipment ensures that the gear wheels and worms – meaning the shafts equipped with one or more screw threads – are delivered in optimal quality to the customer.For Managing Director Arno Heiri, this high quality and prompt delivery are two core elements that are responsible for the success of his company: 'We have had very close, longstanding relationships to our customers, above all from the watchmaking and automobile industry.'

Just how much customers appreciate the cooperation with Christ & Heiri has been manifest in the past few years. Because in June 2010, the company's production facility burned completely to the ground. In this, the building was only eighteen months old and equipped to the latest standards.

It was a devastating blow to the then 59-year-old entrepreneur and his team. The fact that Arno Heiri was able to rebuild his plant in the same place and in the same way was largely attributable to his customers. They assured him that they wanted to continue working with Christ & Heiri. His employees also felt a responsibility towards their boss, and they put all their efforts into rebuilding the company. After one year, it was done, and today the production in the new facility with the same employees is running at full speed again. Huge demand for gearbox componentsBecause in modern vehicles, there are many small actuator motors these days – for central locking, controlling the air-conditioning unit, for electric windows, for adjusting the exterior mirrors, for the sunroof, the boot locking mechanism, for seat adjustment and much more.

There is a commensurately high demand for gearbox components such as gear wheels and worms. Depending upon the component, orders at Christ & Heiri range from small series of up to 1000 parts, all the way to large series from 5-6 million units per year.For Christ & Heiri, meeting high precision parameters is no problem. Amongst the twenty-five employees of this company steeped in tradition – it was founded 65 years ago – a vast amount of expertise has accumulated. The Head of Production, Pascal Zimmermann, explains: 'The experience of our workers, in combination with our state-of-the-art machinery, puts us in the position to handle the highest quality requirements with process reliability.' The management places the greatest importance in process reliability.

After all, the 24 CNC gear hobbing machines from Monnier + Zahner are running round the clock, seven days a week. All the automobile parts are produced on the MZ120 and MZ 130 gear hobbing and worm milling machines and the Duplex M644CNC high-production double-spindle worm milling machine.Monnier + Zahner AG from Safnern near Biel, Switzerland, enjoys Arno Heiri's complete trust: 'Our partnership has existed for 10 years, and we have never been disappointed.

The FANUC-controlled MZ machines are high-precision and reliable. If we have any service request, the employees are on the spot immediately. That is why Monnier + Zahner has become the main supplier of our CNC-controlled gear hobbing machines.' About Monnier + Zahner AGIn 1964, Eugen Monnier and Robert Zahner established a company in the Safnern-Moos industrial park which up to 1972 was dedicated to the engineering of machines for watch case fabrication.

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The watchmaking downturn caused a shift of production to machines for the manufacturing of medical implants. In this field, Monnier + Zahner AG has achieved a worldwide leading position.Other important mainstays are grinding machines for dental drills and cutters, along with machines for the production of worms and gears for gearbox manufacturers and suppliers to the automotive industry. This also includes special machines that are built according to customer requirements. Since 2007, the company Lambert-Wahli AG has also been part of the Monnier + Zahner AG group. Today the team comprises 65 employees, including twelve trainees. Monnier + Zahner produces between 65 and 100 machines per year.