The GF50Mi-140 by JTEKT Toyoda is a high-capacity, high-precision CBN Crankshaft Grinding Machine built for maximum productivity and flexibility in grinding long automotive and industrial crankshafts.

As part of the advanced GF50Mi series, this machine is specifically designed to meet high-demand production requirements for longer workpieces, featuring a substantial Distance Between Centers of 55.1 inches (1400 millimeters).

The GF50Mi-140 enhances efficiency through a dual linear motor wheelhead configuration. This technology allows for the revolutionary capability of performing simultaneous grinding of both a crankshaft pin and an adjacent journal using two wheels, significantly reducing the number of grinding steps and cutting down cycle time.

The machine’s foundation for enduring accuracy is rooted in JTEKT’s patented technologies: the TOYODA STAT BEARING and a floating plate, which ensure high rigidity, long-term stability, and the elimination of bearing wear. Productivity is further improved by the integrated pin phase indexing system that utilizes a touch sensor, as well as an automatic setup change system. These features allow the machine to quickly adapt to workpieces with varying lengths, diameters, and pin strokes, ensuring minimal downtime. The entire operation is managed by the reliable Toyoda GC50 controls.

Key Specifications:

• Type: High Precision Dual Wheel CBN Crankshaft Grinder
• Distance Between Centers: 55.1 inches (1400 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 long automotive and industrial engine crankshafts.