... the condition of of heavy duty and high speed,It has a square working,semiautomatic cycle function. Model: HP3120K Heavy-duty gear ... hobbing machineMain Technical DataMax.work piece dia: 200mmMax. module: 6mmMax.hob diameter: 140mmDia.Of worktable : ... and worktable surface: 310-510mmWorktable bore diameter: 65mmDia.of hob arbors dia: 22,27,32,40mmWorkpiece helical angle ...