A reciprocating surface grinder machine is a type of surface grinder machine that uses a horizontal or vertical spindle to grind flat or planar surfaces on a workpiece. The grinding wheel on the machine is reciprocated back and forth over the workpiece, which is held in place by a magnetic chuck or other holding device.

Reciprocating surface grinders can be used for a variety of grinding applications, including precision surface grinding, flat grinding, and contour grinding. They are commonly used in the metalworking industry for grinding large and heavy workpieces, such as castings, forgings, and welded structures.

The grinding wheel on a reciprocating surface grinder machine can be dressed or shaped to achieve specific surface finishes or geometries on the workpiece. The machine can also be equipped with various types of coolant systems to help reduce heat and improve surface finish.

Reciprocating surface grinder machines can come in a range of sizes, from small benchtop models to large industrial machines capable of grinding workpieces several feet in length. They are widely used in the manufacturing industry for applications ranging from small-scale production to large-scale industrial production.