Minimax Single-Phase 4.8Hp (x3) 8.5' Combination machine 12″ main blade w/12″ Tersa cutterblock w/mortiser, 1.25″ interchangeable spindle, DADO, add table, grav handwheels by SCM Group North America, Inc.. Product Type: Combination Machine. Horsepower: 4.8 HP. Phase: 1.