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Recent content by seventofour

  1. seventofour

    Understanding Torque

    Thank you dvd and Tbuelna for the replies. Perhaps this is why the gearing companies have yet to reply since there are too many unknowns.
  2. seventofour

    Understanding Torque

    I am working on ordering some gearboxes but I am confused on how to select the right one. I work for a small fab shop and we are making a trailer for a foundation contractor. On this trailer will be two reels that are 20inches in diameter when empty and 60 inches when full. These two reels...
  3. seventofour

    Ball Screws and Torque calculations

    I have a set of 4 ball screws, 2 inch diameter by 0.50", one in each corner to lift up a 12,000lb transformer. Each side will have one motor driving a right angle worm gearbox in the center that will power the two other right angle gearboxes that turn the ball screws. I was given that the...
  4. seventofour

    Ball Screws and torque

    I have a set of 4 ball screws, 2 inch diameter by 0.50", one in each corner to lift up a 12,000lb transformer. Each side will have one motor driving a right angle worm gearbox in the center that will power the two other right angle gearboxes that turn the ball screws. I was given that the...
  5. seventofour

    Conveyor Torque

    3DDave, thanks for the reply. Well the customer got back to me, now it seems everything has changed. The roller diameter is now 14 inches, width is 4 feet, and has a length of 10 feet, zero angle, and the conveyor has to handle 10000lbs. It is a level conveyor and the castings will not be any...
  6. seventofour

    Conveyor Torque

    A company called the other day with a question about their conveyor. My company did not build the conveyor but did supply the gearbox. The conveyor is 8 feet long, and 4 feet wide, it is level and transports castings to the grinding department of a foundry. The motor they are using is a 4...
  7. seventofour

    Starting Torque for a welding turntable

    Not really sure if this is a gearbox question or a motor question or if I am even on the right path. We have a pipe fabrication turntable used to rotate the pipe while a submerged arc welding machine welds the joint. The total length of the pipe is 25ft long and is supported by roller stands...
  8. seventofour

    Overhung Load Equation

    I want to extend the output shaft of a gearbox by 6 inches, from the face of output seal to the end of the shaft would be 6.00 inches. I want to calculate the overhung load but all of the equations that I find seem to focus around having a pulley or sheave at the end of the standard output...
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