A planer is a type of metalworking machine tool that uses linear relative motion between the workpiece and a single-point cutting tool to cut the work piece. A planer is similar to a shaper, but larger, and with workpiece moving, whereas in a shaper the cutting tool moves.

A planer machine is a type of metal working machine that uses linear relative motion (reciprocation) between the workpiece and a single-point cutting tool to cut the work piece. … A Planer Machine is larger and has moving workpiece, whereas in a shaper Machine cutting tool moves.

Principle and Working of PLANER MACHINE. Introduction: The planer is a machine tool designed to produce plane and flat surface on a workpiece which is too large or too heavy. The workpiece is securely fixed on a table called platen, and it reciprocates horizontally against a single edged cutting tool.