... whitworth threads such as 7-1/2,9-1/2,10-1/2, 11, 11-1/2,13, 13-1/2, 19, 27 t.p.i. and ... (10-4/5″)Max. swing diameter over gap700mm (27-1/2″)Max. length of workpiece1000mm (40″)1500mm (60″)2000mm (80″)Effective ... range/No.0.25-10mm/20Range of longitudinal feed0.04~2.46mm (0.0015″~0.0913″)Range of cross feed0.02 ...