It seems like you might be referring to a Grinding Machine. A Grinding Machine is a tool used for cutting, finishing, and shaping materials with high precision by using a rotating abrasive wheel.

Types of Grinding Machines:

1. Surface Grinding Machine: For producing flat surfaces with high accuracy.
2. Cylindrical Grinding Machine: Used to grind cylindrical surfaces, both internal and external.
3. Centerless Grinding Machine: Grinds cylindrical surfaces without using centers to hold the workpiece.
4. Tool and Cutter Grinding Machine: For sharpening tools like drills, milling cutters, and other cutting tools.
5. Bench Grinder: A small, versatile machine used for sharpening and light grinding.
6. Belt Grinding Machine: Uses a belt coated with abrasive material for surface finishing.
7. Jig Grinding Machine: For grinding complex shapes and holes with high precision.