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  1. desertfox

    Brick work crack

    Afternoon All I don’t very often ask for help however I would welcome any advice on the brickwork on my home. I have never noticed this small crack in the brickwork until today. The house is around 40years old and I have had no problems over the past years. The crack (see photo) appears to be...
  2. desertfox

    Stress Relieving Stainless Steel Fabrication

    Hi all I'm hoping someone can put my thoughts in context regarding the above subject. I am currently trying to decide whether to have a small folded and welded piece of Ferritic Stainless steel stress relieved or not, the fabrication is made from a 1.5mm thick sheet folded into a U section...
  3. desertfox

    Thermal Expansion Of A Large AC Motor

    Hi Recently we received details of a large AC motor which will be mounted on a fabricated skid with 4 bolts M56, however about a week later we were informed that the bolts need to be increased in size to M64 because of thermal expansion of the motor casing. Now this is where I don't understand...
  4. desertfox

    Constant Torque Motor

    Hi Hope somebody can sort my confusion out:- I have a very old assembly drawing (1985) which shows an old DC motor on it and the only information I have on it are these figures 5.5kW at 1500 rpm and 2.75kW at 750rpm. Clearly the torque at these two speeds is the same and I understand that...
  5. desertfox

    Strain Energy

    Hi Help an old fart here, I have an impact situation where a mass M travelling at X m/s collides with a spring mounted block, I went for the usual energy transfer ie:- 0.5mV^2 = 0.5 Kx^2 Then I started to consider what effect spring preload would have if any...
  6. desertfox

    Torque Capability Of an Intereference fit joint

    Hi Can anyone help me with this query:- thread725-314067 regards desertfox
  7. desertfox

    Torque Transmission Of An Interference Fit Joint

    I am used to calculating interference fits between a hub and a shaft and their torque capability when both materials are stressed within their elastic limit. I was looking at something the other day which may lead to the shaft being stressed beyond its yield value, while the hub material would...
  8. desertfox

    Circuit Wiring Query

    Hi all I am considering putting a double socket in my garage near to where the distribution board is situated and was considering options of the best way to do this, my first idea was to run a mini ring main with the double socket directly to and from the distribution board, as I have already...
  9. desertfox

    Bolted Busbar Joint & Temperature Rise

    Hi I am looking to do a bolted joint analysis on a copper busbar similar to the one on page 13 of this paper.(link below) I need no help with the analysis as such, but an interesting point was brought to my attention and that was the fact that the stiffness of the plain washers was not...
  10. desertfox

    Mechanical Desktop

    Hi Just wonder if anyone can help,I am trying to get a free download of Mechanical Desktop 5 full version,I have done a google search and all I can locate are either demo's or sites which you need to register and pay £25. Anyone know where I can get it completely free. Regards desertfox

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