Specifications: Max. Outside Diameter (Spur & Helical gears): 12" Max. Face Width Spur: 6-3/4" Max. Face Width Helical:Depends on Pitch & Helix Angle Pressure Angles: 14-1/2" to 30" Max. Helix Angle: 45 Degree Pitch Ranges (Two Lead Screws Available): 6 to 48 D.P. -or 20 to 120 D.P. Involute Tolerance: 0.0002" or Better Tooth-to-Tooth Spacing: 0.00015" or Better Lead or Parallelism Per Inch of Face Width: 0.0002" or Better Overall Length Not Including Control Box: 7'12" -Including Control Box: 11'0" Overall Width: 8'9" Overall Height: 7'6" Weight, Net Approximate: 9,500 lbs