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  • Users: nnjunger
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  1. nnjunger

    O & K Shovel

    I am looking for some information on an O&K RH75C shovel. I was recently transfered to a location where this shovel was in service. We are upgrading our equipment fleet, and I am trying to determine how well this shovel can support the new trucks. However, I have been unable to find a cut...
  2. nnjunger

    Failure Modes

    We are beginning to establish our failure modes, and I am sure that libraries of standard failure modes exist for common pieces of equipment (pumps, fans, gearboxes, etc.). Does anyone know how to obtain this information as a starting point rather than reinventing the wheel. I understand that...
  3. nnjunger

    Improving Yourself/Adding New Skills

    I have a general question. Now that I have been in industry for about 10 years, I have found that I am slipping into more and more of a project management role, and am losing some of my "hard" engineering skills. To make matters worse, I have found that I am having a hard time keeping up with...
  4. nnjunger

    Part Time Work

    Let me give a little background on myself and what I am looking for. I have about 7 years experience in maintenance and engineering in an industrial manufacturing setting, and am finally getting around to reviewing to take the PE exam. One thing that I have run into is that I need to expand my...
  5. nnjunger

    Foundation Mass/Looseness

    I have a rather large fan (250 HP, belt driven, 600 rpm, 9'2" fan wheel diameter). We had some vibration on the fan prior to our shutdown, we opened and inspected the shaft bearings. Upon inspection, we found bearing looseness, so we replaced both bearings. After reassembly, we are still...
  6. nnjunger

    shutdown management software

    Does anyone have any experience with some good shutdown/turnaround project management software. I have been trying to use microsoft project, but it really does not like jobs that run 24/7, or have very strange start times. It might just be the way I am trying to use it with changing working...
  7. nnjunger

    calculating bearing radial load

    I am having a bad day evidently. I have forgotten how to run calculations for radial load on a bearing. Does any one have a good reference for this type of work or guidance along the subject? Thanks in advance.
  8. nnjunger

    stainless fasteners

    There has been a concern raised of "gaulding" of stainless nuts when used with the stainless steel "studs" that we have in place. Is there a good reason to use carbon steel versus stainless in this application. Corrosion at the point of these fasteners is not an issue, the only reason that the...
  9. nnjunger

    belt tension and bearing load

    I am trying to run a simple calculation for bearing load on a motor bearing, and have evidently not done enough calculations in a long time, because I keep getting unrealistic answers. My system is pretty simple, I have a motor, belt driven to a machine. The sheaves are 14" drive, 12" driven...
  10. nnjunger

    PE for Mechanical

    I am looking for PE review material, and was wondering what people have found useful (I am sure this has been covered before, but I couldn't find the thread), and also if anyone has review material they are looking to sell at a reasonable price. Thanks.
  11. nnjunger

    open loop question

    I have a process problem that I am trying to solve. I will try to provide all the background I can. I have a tank, volume is approximately 10,000 gallons, surface area is 628 ft^2. This tank is initially filled with water at 60 degrees F. I have a constant supply of water to the tank at 60...
  12. nnjunger

    Fatal error on LT2002

    I am trying to edit a large file supplied by a vendor. When I try to add/copy basic functions on this drawing to explain some of it, I get a "INTERNAL ERROR: GEDIT 3", which then kicks me out of the drawing and shuts down autocad. Any ideas or suggestions?
  13. nnjunger

    Elongation of material

    I was given an unexpected response today by a vendor regarding ordinary 2 or 3 ply belt conveyor material (similiar to goodyear 220 or 330). They stated that the material actually shrinks at temperature. I am aware of some materials, especially on refractory applications that I have dealt...
  14. nnjunger

    acad instruction

    I am looking for an online course/tutorial to help me brush up on autocad. I have never been an expert, but my job is changing to require more drafting and design work, hence the need to improve my skills. I have looked for courses in my area, but they seem either too basic, or too general for...
  15. nnjunger

    gearbox base plate design

    I am looking for a software package to simulate loads on stresses on baseplates for gearboxes. Most of the applications I have are retrofitting equipment in an existing facility, but we have to design new bases to take the loads. Currently, we use past experience and common sense, but not a...

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