Double Disc Grinders > Giustina R242

Product catalog summary

Overview: Cinetic Giustina s.r.l., a subsidiary of Fives Cinetic, specializes in high-production grinding machines, particularly for the automotive industry. The company is based in Torino, Italy, and is part of the Fives Group, which had a turnover of approximately 350 million Euros in 2007.

Product Range: The product line includes grinders for flat surfaces, centerless grinders, special grinders for valves, camshafts, and high-speed CBN grinders for plunge and peel processes.

Double Disc Grinders R242: This model is designed for grinding large bearings up to 800 mm. It features horizontal wheel rotation, a machine weight of 14,000 to 14,500 kg, and grinding wheel sizes ranging from 762 mm to 1067 mm. The machine uses a moving quill spindle type with precision ABEC-7 bearings and offers a grinding feed rate of 0.1 to 1000 mm/min.

Applications: The grinders are used in various industries, including construction, agriculture, cement, marine, textile machinery, robotics, petrochemical, energy generation, material handling, and woodworking.

Loading Methods: The R242 model supports manual, gantry, and robotic loading. Manual loading involves using a jib crane for heavy rings, while gantry loading uses NC-controlled axes for precise placement. Robotic loading employs a 6-axis robot with brushless motors for efficient handling.

Control Systems: The machine is equipped with Siemens 840D or Fanuc NC systems, which manage the grinding process, guide machine setup, and monitor wheel wear.

Test Results: For bearings with a diameter of 360 mm, the machine achieved a maximum removal of 0.6 mm with high precision in thickness, parallelism, flatness, and roughness, maintaining a CPK of ≥ 1.67.

Contact Information: Cinetic Giustina s.r.l. is located at C.so Lombardia 79, Z. I. Pescarito, 10099 San Mauro T.se (Torino), Italy. Contact can be made via phone at +39.011.2228611 or fax at +39.011.2228632. More information is available at www.fivesgroup.com.

Catalog excerpts

Fives Cinetic encloses in the heart of the Fives Group all competences for assembly, equipment production and services for the grinding processes especially dedicated to the automotive industry. Cinetic Giustina is a 100% branch of Fives Cinetic and operates in the field of high production grinding machines in its Plant based in TORINO, Italy. The Fives Cinetic turnover during 2007 represents around 350 millions of Euro for 1400 employees. > Grinders for flat surfaces - Vertical double disc grinders - Horizontal double disc grinders - Grinders with rotary table Centerless grinders Special grinders...

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Giustina grinderR242 to groundbig bearings(up to 800 mm) > Cinetic Giustina s.r.l. 3 >

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Cement industry Textile machinery > Construction / Earthmoving Cardanic transmissions Marine / Port installations Agriculture Robotics Wood-working machinery Petrochemical industries Hydraulic pumps & motors A-Power Energy Generation System Material handling machinery Precision rings >

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Servo Control Wheel Positioning and Dresser Control > Siemens 840D Solutionline CNC Control > Cinetic Giustina s.r.l.

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Pieces could be loaded as follows:1.manually;2.with gantry;3.with robot. Manual loading . Rings are loaded manually (with possible use of a jib crane in order to help the operator handle big size and heavy rings) directly on the rings support, complete with rolls, which allows piece rotation between the grinding wheels (supports are supplied by part type range; a rapid change system is foreseen).Once the part is introduced between the grinding wheels, the grinding cycle starts. At the end of the grinding cycle, the support goes back to the loading position and the ring is taken manually from...

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Once the part is on the support, it moves until it reaches the right position between the wheels. Then, grinding cycle begins. The process can be carried out with the oscillation of the carriage, on which support devices are mounted, thus allowing better parallelism and flatness.At the end of the grinding operation cycle, the support goes back to the loading position, the part is taken by the gantry and unloaded on the tilting device which makes the part rotate 90 in order to unload it horizontally on a motorized carpet. Loading with robot . Rings are loaded and unloaded directly from and on...

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