The GF50Mi-70 by JTEKT Toyoda is a high-precision CBN Crankshaft Grinding Machine built for advanced manufacturing, offering exceptional productivity and flexibility.

The GF50Mi series is designed to meet the demands for higher labor productivity and small lot production of multiple models in the automobile engine manufacturing industry. This model is engineered with a dual linear motor wheelhead, allowing for the simultaneous cutting of both a crankshaft pin and an adjacent journal with two wheels. This process integration drastically reduces the total number of grinding steps and results in a significant reduction in cycle time.

The machine is founded on JTEKT’s legacy of accuracy, featuring the patented TOYODA STAT BEARING and a floating plate, which ensures high rigidity, stable accuracy, and long-term durability by eliminating bearing wear.

Flexibility and setup changeover time are managed efficiently through the pin phase indexing system that uses a touch sensor to accommodate various workpieces with differing pin diameters and pin strokes. The machine is controlled by the robust Toyoda GC50 CNC system.

Key Specifications:

• Type: High Precision Dual Wheel CBN Crankshaft Grinder
• Distance Between Centers: 27.6 inches (700 mm)
• Swing Over Table: 19.7 inches (500 mm)
• Maximum Grinding Diameter: 3.3 inches (85 mm)
• Wheelhead Drive: Dual Linear Motor Wheelhead
• Controls: Toyoda GC50 controls
• Primary Application: High-speed, high-accuracy simultaneous grinding of crank pins and main journals on automotive and industrial crankshafts.