Brief description of the Grinding tool

The grinding tools and technology is user friendly, but at the same time it is capable of grinding the crankpin/Main journal within close dimensional tolerance. The grinding tool is portable and can be easily carried by technicians to the site whether it is a remote power plant or a ship stranded in mid sea.

The Machine is located on the Fillet radius of the pin which serves as reference for the grinding of the pin. The machine rotates around the crank pin at about 3 rpm in oscillating motion i.e. it will turn 360 degree in clockwise direction and 360 degree in anti-clockwise direction. The grinding process itself is carried out by a pneumatic grinder operating with a suitable grinding stone for fine finish and close dimensional tolerance. The pneumatic grinder used will be of different sizes depending on the Crankpin diameter. The speed of the Pneumatic grinder will be between 7000 rpm to 4000 rpm depending on the grinder size.

Since the machine uses the fillet radius as the reference as well as the guide way the ground pin’s concentricity with the actual pin center is maintained.
The drive for the machine is also pneumatic which give high power output within the confined space.

After the actual grinding process the pin will be honed with a special vibratory honing machine to achieve close dimensional accuracy and fine surface finish.
In case of situations where the depth to be undersize is more machining attachment is also used.