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Type: Posts; User: Hudson

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  1. Not my field but the amateur radio people who...

    Not my field but the amateur radio people who experiment with transmissions in the microwave bands get pretty inventive with antenna construction. You might check out some of the things in that...
  2. Free cad and free cad fem module. Your comfort...

    Free cad and free cad fem module. Your comfort level with the tutorials will give you the ability to refine the time estimate a bit.
  3. And you think the print is unclear?

    And you think the print is unclear?
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    You need help with the equations? Moment...

    You need help with the equations?

    Moment from arm = 100 kg x 650 mm = 65000 kg mm

    (22.5 mm x Force on bottom bolts) + (152.5 mm x Force on top bolts) = 65000 kg mm in the opposite...
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    A ball park method: You have a moment on the...

    A ball park method:

    You have a moment on the beam that is transferred to the plate. Presumably you know the distance from the bolt holes to the bottom edge of the plate.

    I would calculate...
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    You have not presented a clear picture of the...

    You have not presented a clear picture of the problem or exactly how your equation came to be. We went from casting a cylinder to a rectangular tube of unknown dimensions and we added a speed but...
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    To convert rpm to radians per second, multiply by...

    To convert rpm to radians per second, multiply by .10472
    The obtain centrifugal force you need to square the rotating speed so to convert to rpm^2 use .10472^2 or .010966
    You also need to convert...
  8. Water molecules are very polarized and are pulled...

    Water molecules are very polarized and are pulled apart by the opposite charges in the equipment you illustrate. It is a DC current not a frequency phenomenon.

    You can store energy in this...
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    Are you referring to the bending owing to...

    Are you referring to the bending owing to gravitational force? If so, is the shaft uniform in dimensions so that you can treat it like a uniformly loaded beam? Then you probably want the shaft...
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    One method is to use a press fit and/or a...

    One method is to use a press fit and/or a retaining ring on the shaft in the fixed location and have a slip or sliding fit on the floating end. In both cases the outer race is fixed.
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    My review suggests the original post was...

    My review suggests the original post was manufactured by rolling - in self-pity. The material is probably snowflake.



    It is entirely possible that the interviewer was trying to be helpful...
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    Check out sonic welding. There is also some...

    Check out sonic welding.

    There is also some pretty good glue in the plumbing aisle.
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    force on pins

    The projecting pins will be pushed outward or inward by the mating holes.

    This force exerts a bending moment on the pins attempting to rotate them.

    The force also tries to move the pins away...
  14. Thread: No. of Holes

    by Hudson
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    Multiply the pressure times the area inside the...

    Multiply the pressure times the area inside the gasket to get the force trying to push the cover off the valve. The total clamp load of the bolts should be several times this value. How many times...
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    You'd think it would work just fine as the...

    You'd think it would work just fine as the external pressure is only 1/10 of the rated internal pressure capacity.
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    Another option is a stepper motor. You have 12...

    Another option is a stepper motor. You have 12 Volts. You'll need, in addition to the motor, a driver that regulates D.C.direction and power to the motor coils to determine position and motion plus...
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    An observation: The holes on the smallest bolt...

    An observation: The holes on the smallest bolt circle are near the weakest part and none of the holes are aligned for manufacturing.
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    The deliberate misalignment of locating pins...

    The deliberate misalignment of locating pins creates an "interference fit".
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    Can you machine a 10mm hex on the end of the 12mm...

    Can you machine a 10mm hex on the end of the 12mm shaft and let maintenance use a socket wrench and extension?
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    A file or tiny grinder on a bottom edge would...

    A file or tiny grinder on a bottom edge would remove any plating and reveal the base material.
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    Why not tolerance a wall thickness to the O.D....

    Why not tolerance a wall thickness to the O.D. that can be checked with a simple ball or tube micrometer instead of relying on CMM and inspection tables. Think like a machinist.
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    Do I see 'B' and 'C' datums as the edge of both a...

    Do I see 'B' and 'C' datums as the edge of both a 3" and an 8" square part? Then you call out parts to be centered?

    Why not make two bolt holes a common datum in the x & Y plane?
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    Sounds dangerous but, first determine if the...

    Sounds dangerous but, first determine if the floor can handle the load. If you have two 1 foot wide, seven foot long supports at the base and 21,000 lbs supported by them that's 1500 lbs/sq.ft if...
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    Consider a urethane adhesive for windshields. ...

    Consider a urethane adhesive for windshields.

    https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Auto-Glass-Urethane-Windshield-Adhesive/?N=5002385+3293242009&rt=rud
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    Are they multi-million dollar dies? Years ago,...

    Are they multi-million dollar dies? Years ago, when the earth was thought to be cooling, auto makers used a free machining, low melting alloy called Kirksite for fender dies.

    More recently,...
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