Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by rwelk

  1. rwelk

    single phase motor -- current

    one more thing, I don't know if it ac or dc, should that matter? The specs i have are from the company I bought the fan from, and not the motor, and that is partly why I have such limited information.
  2. rwelk

    single phase motor -- current

    what is the power factor? Can I determine that, or is that a characteristic of the motor? If i can't determine it, can I estimate reasonably? This motor is ''small'', 0.5hp, 1725rpm, 120V/1ph/60hz used to run a small fan. Unfortunately, those are the only specs I have on the motor. cheers
  3. rwelk

    single phase motor -- current

    If I have a 120V - single phase motor, is current simply equal to power/voltage?
  4. rwelk

    Wood Chip Boiler Controls

    Look into Danfoss controls.
  5. rwelk

    Looking for surface hardening of 304SS

    Out of curiousity, why can the outside not be hardened?
  6. rwelk

    Switching from SS304L

    mcguire, any idea on costs of 439?
  7. rwelk

    Switching from SS304L

    I have been looking into switching from 304L to a cheaper alternative. I noticed in MetalMickey's thread, that it was suggested to switch to SS201, SS439, or SS430Ti. What type of applications would these materials work for? I am looking to use it on a conveyor used to move ash. The...
  8. rwelk

    FEMLAB

    I am just learning femlab, and to do simple problems it's coming along well. but i was wondering if anyone knows a good website that has a list defining error messages? Or does anyone know if it is in one of the manuals? I have searched through them but haven't found anything. I am wondering...
  9. rwelk

    FEMLAB question

    Can anyone tell me what the error message "Solnum out of range -- Maximum value: 0" means, and how to correct this error?
  10. rwelk

    curious about engine breaking

    I don't know if anyone can answer this question. But I was just curious if engine braking a car (manual transmission) has any negative effect on the motor, or gearbox?
  11. rwelk

    good magnetic material with low magnetisation

    try www.matweb.com, I think it's a great database
  12. rwelk

    abrasion resistance

    Can anyone tell me what physical factors play a role in abrasion resistance? I would think that hardness would play the most significant role, but is it the only deciding factor? I guess, maybe a low thermal conductivity to keep the material from heating up, and softening. Although, I don't...
  13. rwelk

    To Metman, How Did You Know Recrystallization T

    I believe recrystallization starts at 727C for carbon steels. I hope metman agrees with me on this. I thought it could be read off the phase diagram of Fe-Fe3C.
  14. rwelk

    thrust force on bearing

    Does anyone know how to calculate the thrust force acting on a bearing used for a screw conveyor?
  15. rwelk

    Pressure from garden hose

    Maybe I'm just not reading this right, but are you simply filling up the tank? If so, is it too difficult to put an escape valve on top just to be sure? Either way, the calculation does not seem to be too difficult. Constant temp, and amount of air, with a change in volume and pressure. I'm...

Part and Inventory Search