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    I have dealt with a number of special bevel gears...

    I have dealt with a number of special bevel gears over the years, and I haven't seen any of your calculations. That said, my first impression of the picture is that whatever factors in your...
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    There are cabinet door hinges that do that. They...

    There are cabinet door hinges that do that. They connect the door to the frame in such a way that when the door opens it pivots about a centerline that is outside the physical boundary of the hinge...
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    I think your problem is probably the location of...

    I think your problem is probably the location of center of rotation. If the centerline of your pivot point is above the red floor then the bottom corners of the two opposed green shells are going to...
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    We might be able to help if you could draw it out...

    We might be able to help if you could draw it out to scale.
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    The drawing could use much improvement. Most of...

    The drawing could use much improvement. Most of the lines looked like object lines to me. None of them looked like hidden lines or tangent lines. Based on the arrangement of the lines in the left...
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    That's a very open-ended question with very...

    That's a very open-ended question with very little definition. What have you tried? Why didn't it work?
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    What is your question?

    What is your question?
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    Back in the day engineers used mechanical...

    Back in the day engineers used mechanical indexers to drive dial indexing tables for all kinds of automated assembly processes. I used Camco indexers on several successful projects. Like these:...
  9. I have no idea of the loads you are dealing with...

    I have no idea of the loads you are dealing with or the precision with which these carriages must move. Are the carts rolling on the floor now with no damage? If so, great! No need to over-think...
  10. Have you sized the wheels? If so, contact the...

    Have you sized the wheels? If so, contact the manufacturer's application engineer and get their recommendation on angle size etc. I would say as long as its fully supported on concrete over its...
  11. A few tips: 1 - You said the rails are fully...

    A few tips:
    1 - You said the rails are fully supported on a concrete floor, so I don't see where a bending analysis is even required.

    2 - The bending diagram you referenced is for a beam...
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    Well sorry, but the phrase "looking for an...

    Well sorry, but the phrase "looking for an element of patentable novelty" does seem to infer that one is desiring to achieve a patent. I'm trying to understand why one would intentionally not use a...
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    No need to remove yourself. Hang around. There...

    No need to remove yourself. Hang around. There is always more to learn.
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    What he said!

    What he said!
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    In a way you just answered some of your own...

    In a way you just answered some of your own questions. You said the instrument displays "Nm". That is a different animal than "N". One is a unit of force. The other a unit of torque. And there...
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    A force of 7N applied at the center is simply a...

    A force of 7N applied at the center is simply a force of 7N. Force has a linear direction and a single location. A rotary force is a torque. And torque is always expressed in terms of force @...
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    The key to failure analysis is to identify the...

    The key to failure analysis is to identify the very FIRST point of failure, the initial crack, and why it failed AT THAT POINT. Many times we find a "stress concentrator" at that point, usually in...
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    I don't understand your question - "How to...

    I don't understand your question - "How to machine it?".

    Are you saying you don't understand the machining steps involved to create the various parts? If that is the case then get advice from a...
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    "I'm not sure whether I would get a smooth and...

    "I'm not sure whether I would get a smooth and accurate surface from a tube with an inside weld seam".

    You have your answer from Kelly:
    "ID of pipe smaller than required on build then drill/ream...
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    Have you built prototypes? Did they work well? ...

    Have you built prototypes? Did they work well? Go from there, one step at a time.

    I doubt that this is the place to get all your engineering and process information for the successful...
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    When I read the word "piston" I assume some fluid...

    When I read the word "piston" I assume some fluid or air will be involved. I also assume you will want the piston to seal against the walls of the cylinder and not leak as it moves. If that is...
  22. You said you calculated the moment created by a...

    You said you calculated the moment created by a 500# load at the corner 40" from the center (1667 ft-lb) but didn't know what to do with it. Well, first thing, it's "ft-lb", not "lb/ft". There's a...
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    Well you're in the right neighborhood, but wrong...

    Well you're in the right neighborhood, but wrong address I think. The ONLY review on that item is not pretty. The product itself might be fine but there are no guiding instructions etc to help a...
  24. Thread: Lead screws

    by jboggs
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    Homework question?

    Homework question?
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    You are looking for a flow divider. There are two...

    You are looking for a flow divider. There are two types that I know of: proportional and gear or rotary. My experience with the proportional types has not been good. (They were probably...
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