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Recent content by MattRR

  1. MattRR

    Look for helical formed gears

    I don't understand what you are talking about. Can you provide further explanation? Thank-you very much.
  2. MattRR

    spur gear box or planetary gear box in light winch

    Rinsuke, For more info, contact George Gianopulos & Associates, Dayton, Ohio. Phone 937-274-2996. Matt
  3. MattRR

    spur gear box or planetary gear box in light winch

    Rinsuke, I am aware of someone who is developing a new type of "bearingless planetary" for a similar load, speed, and reduction ratio application. Target cost is $400 per unit, building 100 units at a time. Unit cost could be reduced if larger production is planned. Weight is under 5...
  4. MattRR

    Looking for info on "Dog" clutch

    From page 138 of "Manual Gearbox Design" by Alec Stokes, "To prevent the face dogs slipping out of engagement while under load, they should be manufactured with a retaining reverse angle of between 5 degrees and 7.5 degrees on their mating faces. This means that the nose or outer...
  5. MattRR

    Low cost manufacturing of gears

    I am helping someone with a new project. He will have production volumes of 50-100 units at a time. The unit has 11 gears. 5 simple spur gears, 20 pitch, .5-1.5 inch diameter; 4 planet gears about 1 inch in diameter and 14 pitch, and a ring gear that is 3 inches in diameter. Of course it is...
  6. MattRR

    Looking for info on "Dog" clutch

    Alec Stokes wrote a book, "Manual Gearbox Design", that I believe has that information. I could not find the book this morning, I will continue to look. I also have a paper by a Chrysler engineer, I am still looking for it. Hope to have an answer by tomorrow.
  7. MattRR

    Gear vs Chain efficiency

    EnglishMuffin, I was not referring to Novikov gears, although I do believe Novikov gears do have unrecognized advantages. For Novikov gears, I would recommend contacting Dr. Stepan Lunin, his contact information is at www.zakgear.com. I was referring to S type gears, and derivatives of S gears...
  8. MattRR

    Gear vs Chain efficiency

    One of the primary advantages of non-involute gears is that it is possible to dramatically reduce sliding losses in gear meshes. I am so tired, of the so called gear "experts", who keep insisting involute meshes are always so efficient. I won't even talk to them anymore. Involute gears...
  9. MattRR

    Moving fireplace down flight of stairs

    Horizontal, you are pulling the coefficient of friction times 450 lbs, or about 150 lbs. At 45 degrees, to be safe, I would make sure you can handle the full 450 lbs.
  10. MattRR

    Steel pinion vs. plastic

    Plastic gears usually are ok to 1 hp.
  11. MattRR

    Gear Analysis

    You might try George Bowers at 765-349-9828.
  12. MattRR

    Press fit pin retention

    If we put a flat on the side of the pin to let the air out, would loctite work ok? There is a loctite UK website that indicates loctite works well on press fit pins. I know that roll pins do work lose. I just need assurance that the groove pin absolutely will not work lose before I can propose...
  13. MattRR

    Press fit pin retention

    Would loctite be ok?
  14. MattRR

    Press fit pin retention

    We have vibration under unusual situations - usually when we have not balanced the assembly correctly. Thanks for the websites!
  15. MattRR

    Press fit pin retention

    We currently pin two concentric shafts to form a torquemeter. We use five pins around the circumference of the shafts. The pins are inserted radially from the outside. We weld over the tops of the pins to insure they do not come loose under heavy vibration. We would like to eliminate the weld...
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