In Situ Crankshaft Grinding

Imagine running a major automotive plant in North India where vehicle doors and bonnets are stamped out every single day. Now, imagine the heart of that entire operation—a massive 3500-ton press supplied by a leading Japanese manufacturer— suddenly develops a 400 mm crack right through its main frame plate. For the plant managers, this wasn't just an equipment malfunction; it was an absolute emergency. Replacing a frame of this scale takes months and costs a fortune. That is when they called RA Power Solutions. Getting Down to Business on Site Our engineering team headed straight to the plant during a scheduled shutdown to take a closer look. Before we could fix anything, we had to see the true extent of the damage: The plant team stripped away all the parts around the trouble spot. We used chemicals to completely scrub off layers of paint and red oxide. We ran a hardness test on the material. Finally, we performed a magnetic particle inspection (MPI). The MPI confirmed our wor...

Cast iron shows up everywhere in marine, power, mining, cement, and heavy engineering—engine blocks, crankcases, cylinder heads, pumps, turbine casings, and you name it. It's strong, it damps vibration well, and it holds its shape under load, which is exactly why it's been the go-to material for these components for so long. The catch is that it's brittle. Push it too far, run it too long under stress, and it cracks. When a large casting cracks, the instinct is often to replace it. But replacing big cast iron components is expensive and slow, and that's exactly why metal stitching has become the preferred fix for a lot of operators. It repairs cracked cast iron without welding, and it does it while keeping the component's strength and dimensions intact. Why Do Cast Iron Components Crack in the First Place? After years of repairing marine and industrial machinery, one thing becomes clear pretty quickly—it's rarely just one cause. Usually it's a mix of condi...