hauser mod 3 smo
Hauser Jig Borers Page 2 . Hauser No. 4 Jig Borer For many years Hauser offered just two twin-column jig borers, the No. 4 and No. 5, and a jig grinder of similar construction, the Type SM. In the 1930s an additional model, the 3 1/2, had also been listed, together with the possibility of even larger machines (though details are scarce).