FEATURE FOCUS Special bearings for planetary Bonfiglioli was facing a severe challenge in trying to increase the performances of their planetary travel drive 700C series, limiting at the same time the dimensions and not being badly affected on the costs. The solution? A special full-complement double-row cylindrical roller bearing developed by CPM. Andrew Bones In order to increase the performances of their planetary travel drive 700C series, Bonfiglioli has chosen CPM as a reference partner in the global special bearings scenario. ince 1956 Bonfiglioli has been designing and developing innovative and reliable power transmission and control solutions for industry, mobile machinery and renewable energy applications, globally. They promote sustainable and shared development around the world by providing dynamic, responsible, prompt and customer-centred products and services. The development of effective, tailored solutions for a wide range of applications is a fundamental aspect of Bonfiglioli’s job. They succeed in this because they closely co-operate with customers, listen to requests and work with them to improve their own performance. The very same happens with their partners and providers. Bonfiglioli works to the strictest standards of quality and safety, as certified by seven different international institutes. The products they manufacture – that use CPM special bearings – are intended for a wide range of industrial fields of application as earthmoving machines, road construction and maintenance machines, generic construction machines, lifting and internal Power Transmission World - september 2012 transports, drilling machines, foundations and ground stabilization, agricultural and forest machines, as well as yaw and pitch drives for wind turbine generators for renewable energy systems. Bonfiglioli’s customers range from top international OEMs to local operators. The challenge: criticality in lubrication Bonfiglioli was facing a severe challenge in trying to increase the performances of their planetary travel drive 700C series, limiting at the same time

Technical data of the solution Giovanni Zinzani, Mobile & Wind Solutions, Product Development Director in Bonfiglioli (Calderara di Reno, Bologna, Italy). CPM solution • Bearing – part number 2609 Key components • Cylindrical roller bearing • Steel100 Cr6 • Internal Diameter 50 • External Diameter 69.67 • Width 37.5 • Cr 111.2 kN • Cor 186.9 kN The solution: a special cylindrical roller bearing mensions and not being badly affected on the costs. During an endurance test made in according to Product Development Process, the bearings assembled on the planetary gears of one of these proto unit failed...