A JIG coordinated hole grinding machine is a specialized machine tool that is used to grind the internal and external surfaces of holes to a precise size and finish. The machine uses a grinding wheel that is guided by a JIG or fixture to ensure accurate alignment and positioning of the workpiece during the grinding process.

JIG coordinated hole grinding machines are typically used to grind holes that have a very precise size and shape, such as those used in the aerospace, medical, and precision manufacturing industries. They are also used to grind holes that have a specific surface finish requirement, such as those used in the automotive and electronic industries.

A JIG is a work holding device that is used to hold and position the workpiece during the grinding process. It can be adjusted to provide accurate alignment and to hold the workpiece in the correct position. It also provides the reference point for the grinding wheel to provide a precise and accurate grinding.

The JIG can also be designed to be adjustable to accommodate different sizes and shapes of workpieces, and it can be used to grind different types of holes such as circular, rectangular and irregular shaped holes.

A JIG coordinated hole grinding machine typically consists of a grinding wheel that is driven by a high-speed motor, a JIG or fixture to hold and position the workpiece, and a coolant system to keep the workpiece and the grinding wheel cool. They require skilled operators and a good understanding of the grinding process. They are also relatively expensive, and require proper maintenance and calibration to ensure accurate and precise grinding.