Summit Series 70 70" x 480" Heavy Duty Engine Lathe Maximum Swing Over Bedways: 70." Maximum Swing over Carriage: 53." Distance Between Centers: 360" Bed Length: 480" Spindle Speeds (16): 3-300 Spindle Bore: 8.1" Spindle Nose: A15 Diameter of Tailstock Sleave: 8." Traverse of Tailstock Sleave: 17." Taper of Tailstock Sleave: 7 MT Bed Width: 39." Longitudinal & Cross Feeds: 0.0062 - 0.3968 IPR Longitudinal Feeds: 0.0031 - 0.1984 IPR Longitudinal Feed of Swivel Slide: 0.0031 - 0.1984 R Cross Feeds: 0.0031 - 0.1984 R Longitudinal Traverse Swivel Slide: 15." Diameter of Lead Screw: 2." Whitworth Threads, Inch (70): 1/4 - 28 I Metric Threads (70): 1 - 112M Diametral Pitch Threads (70): 1 - 112 Module Threads (52): 0.25 -28 Maximum Weight Between Centers: 33,075 L. Maximum Weight with One Steady Rest: 45,000 L. Rapid Traverse of Carriage: 216.53 IPM Rapid Tracerse of Cross Slide: 108.26 IPM Equipped With 59" 4-Jaw Chuck Power Compound for Taper Turning Inch & Metric Threading Hardened Bedways Thread Dial Rapid Traverse 31" Diameter 4-Roller Type Steady Rest 41" Diameter Steady Rest Follow Rest 49 HP Main Spindle Motor (37 KW)