CATALOG SPECIFICATIONS: Maximum Pitch Diameter with a 4" Hob 13.32" Maximum Pitch For Hobbing Steel: 4,25 DP Maximum Workpiece Diameter: 11.811" Travel Of Hob Head Carriage: 8.858" Work Table Diameter: 12.401" Hob Spindle Centerline Above Machine Table: 6.496" Minimum Maximum Length Of Workpiece: 26.772" Infinitely Variable Radial Feed: .039" - .472"/Minute Rapid Traverse Of Hob Slide: 37.795"/Minute Weight Of Machine: 14,000# Approx Maximum Hob Length ...5.900" Maximum Hob Diameter: 5.512" Maximum Hob Shift Or Tangential Travel: 5.900" Hob Head RPM, Infinitely Variable: 80 - 640