Looking for CAD Gear Draftsperson

Not able to find these required gears, we now are turning to having them made.

PDF file: Internal_Gear_CAD_Specs4
PDF file image
To save to your computer, right click on link and choose save as.

So we need a CAD gear draftsperson. Here are the specifications of the gears:

LATEST UPDATE 9/4/2012: Now we want the outer gear to be about six inches in diameter. And if you’ve seen/downloaded the specs here prior, the third drawing, “1-stand+connector.jpg” has been changed. This is also reflected in the PDF file.

CAD files that now need modifying – Manufacturing Files.zip
Click to download

  1. The resulting revolution of this transmission will be a 2:1 ratio increase in a reverse direction
  2. We are making a prototype, and plan on using nylon or equivalent plastic, 7/16 to 1/2 inch thick.
  3. Generator is expected to be 20,000 watts with a 100 amp service or 9-10 HP, but I’m suspecting that it’ll be double that.
  4. RPM considered: 3600, but this is for the production models.
  5. The prototype will probably run 5) 100 watt light bulbs at the max, so the load should be fine with nylon gears … if nylon, planetary gears should have brass bushings.
  6. Brass bushings will be inserted in gears where they come in contact with axle rotation, on the planetary gears
  7. We will also need a drawing using steel gears (type of steel TBD), with ball bearings on the planetary gears, with an enclosure (later)
  8. Later still, we will be using magnetic bearings
  9. Sun gear will be fitted for a 3/4″ axle, with a 3/16″ keyway and set screw
  10. Eight helical thread inserts will be installed in the outer gear that will accept 1/4″ fine threaded bolts
  11. Axles for planetary gears will be determined by drafts person, or use 3/4″ metal
  12. Gear teeth pitch and size will be determined by drafts person, but should have at least 2 teeth in contact
  13. All specifics for the following are ONLY suggested, and can change according to drafts person:
    1. Tooth spacing
    2. Contact angle
    3. Teeth quantity on all gears

Please see following drawings.
Should changes be necessary, please contact Steve

Plan view of 2:1 step-up internal gears we need

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3D view of 2:1 step-up internal gears we need

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Stand & hub for the 2:1 step-up internal gears

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Drawing from Rushgears

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2 thoughts on “Looking for CAD Gear Draftsperson

  1. Clarence Goetz

    Hi there,

    Interested in assisting you with this project. Have 16 years experience with AutoCAD, 25 years in construction (Mechanical) and a LARGE desire for alternative energy’s.
    If you still need someone to draw this up for you please let me know.


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