Max Cone Distance (30-Degree Spiral Angle w/12″ Dia Wheel): 15″/(381mm) Maximum Pitch Angle, 90-Degree Shaft: 70-DEGREES Minimum Pitch Angle, 90-Degree Shaft: 5-DEGREES Maximum Pitch Diameter: (90-Degree Shafts): 0-degree spiral angle, 1:1 ratio: 15.5″/(393.7mm) 0-degree spiral angle, 3:1 ratio: 23″/(584.2mm) 30-degree spiral angle, 1:1 ratio: 21″/(533.4mm) 30-degree spiral angle, 3:1 ratio: 31.5″/(800.1mm) 40-degree spiral angle, 1:1 ratio: 22.5″/(571.5mm) 40-degree spiral angle, 3:1 ratio: 34″/(863.6mm) Coarsest DP (Module): 2 DP Coarsest DP (Module) (Metric): 12.7-Module Maximum Face Width: 3″/(76.2mm) Work Spdl Taper Hole Dia.(Large End): 3-19/32″ Work Spindle Bore Taper: (Per Ft) 39/64″ Work Spindle Thru-Hole Diameter: 3.87″/(98mm) Std Grind Wheel OD: 6″-8″ Std Grind Wheel OD (Metric): 1852-203mm Max. Wkhead Offset Above/Below Ctr: 4.5″ Max. Wkhead Offset A/B Ctr (Metric): 114.3mm Distance From Machine Center To Spindle Nose: 3″-20.5″ Distance From Machine Center To Spindle Nose (Metric): (76-500mm) Feed Rate (Seconds Per Tooth): 1.9-11.8 Approx. Floor Space: 135″ x 81″ Approx. Floor Space (Metric): 3429x2057mm Approx. Overall Machine Ht: 97″ Approx. Overall Mach Ht (Metric): 2464mm Approx. Machine Net Weight: 23,000 LBS. Approx. Machine Net Weight (Metric): 10,455 kg’s Machine Equipped With: (2) Machines are sold together Shared coolant tank Full set of index gears Full set of cams Full set of manuals Assorted grinding wheels and arbors