JET 321415 GH-1840ZX Lathe with ACU-RITE 300S DRO. Uniquely designed exclusively by JET. ISO 9001 certified manufacturer. 3-1/8" bore spindle is supported by two tapered and one ball bearing. Chrome molybdenum headstock gears are hardened, ground and shaved. Universal gearbox allows inch, metric, diametral and module pitch threads, no change gears required. Carriage features one-shot lubrication and Turcite-B on bed sliding surfaces. T-slotted compound slide featuring a four-way tool post. One piece cast iron base absorbs vibration allowing heavier cuts. High quality ANSI Class 50 wear resistant cast iron bed ways are hardened and ground. Removable gap allows up to 23-5/8" diameter work on14", 25-7/8" on 16" , 27-1/2" on 18" and 29-1/2" on 22". Five position automatic carriage stop increases productivity. Attractive chrome control levers, dials and knobs complete this impressive package. Tolerance test certificate included