This is automatically grinds exterior of pipe. Polishing and buff grinding stone or wheel paper are used at each grinding head. It is also constituted with roller that transfers and supports work.

Different grinding materials ate installed at the head of main body for rough, medium, and buffing processes. It is constituted with the three most important elements of grinding such as grinding abradant (belt or wheel paper), transfer roller, and supporting rubber roller.

In particular, abrasive has many variables in accordance with martial condition, so selection of abradant is the most important matter.