Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep 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 minerk

  1. minerk

    More snake oil or the real deal?

    Is it time for someone to mention Shroedinger's cat? Don't all quantum discussions end up as arguments about that damn cat?
  2. minerk

    Hard Wire Welding

    I believe the term is referring to hard-surfacing using a MIG process. Is it being applied to resist wear?
  3. minerk

    Torque calculation

    Taking another look at the drawing I see a notation that the input shaft is actually DRIVEN by a torque multiplier.
  4. minerk

    Light-duty tension cable needed. 3 to 5lbf. Small dia

    I've used http://www.phillystran.com/index.htm for larger Kevlar ropes. Not sure how small of an assembly they'll make, but it might be worth checking.
  5. minerk

    Torque calculation

    Torque is Force (lb) x distance (ft). Where you're getting confused is not understanding that the torque in the shaft/sprocket is the same everywhere in the shaft/sprocket. The tangential force is different depending on the perpendicular distance to the axis of rotation. Here's how the...
  6. minerk

    Torque calculation

    The unit as shown has a total reduction of 125:1, entirely due to the torque multiplier. As previously pointed out, gears of the same diameter do not change torque. To get the required input torque divide the desired output torque by the total gear ratio (125).
  7. minerk

    The future of entry level jobs and U.S. engineers

    On careerbuilder.com I find 410 engineering jobs from the last 30 days using the search string "entry level electrical". Took me about 1 minute. I don't think H1B's and automation are your problem.
  8. minerk

    Dry Break Schematic Representation

    I've seen them shown as a check ahead of a connection, i.e. -O>-] [-<O-
  9. minerk

    Formula for rolled up conveyor belting

    Here's one I found, I can't tell you if it works or not... Belt length in feet = A x number of coils x 0.131 A = Diameter of coil in inches + Diameter of coil hole in inches
  10. minerk

    Large stroke 100+ Ton cylinders?

    Looks like Enerpac has 200-ton and up cylinders with up to 48" stroke. http://www.enerpac.com/Main_Navigation/products/industrial_tools/home.htm Click on "General Purpose" under "Cylinders"
  11. minerk

    Shaft steels

    Bigger shafts isn't the answer. Get rid of the stress concentrations and you'll have it. It looks like your small shaft failures occured at the transition to the hex outside the gearbox. If that's true, there's no reason you can't make a smooth transition from the large diameter down to the...
  12. minerk

    Shaft steels

    Shaft failures 1, 2, and 3 (from left to right) are all due to stress concentration at the sharp transition between the diameters. The concave appearance of the shaft ends shows that the reduced diameter actually pulled material away from the shaft as it cracked. This is classic stress...
  13. minerk

    Slab on grade damage

    Another vote for Anvil top (or equivalent). Ever try rolling a tool box (filter cart, welder, torch rig, hand truck) over imbedded rails? Install the anvil top in strips to accomodate the gauge of the tracked equipment.
  14. minerk

    Steel plate for engineering machine.devoloped by chinese manufacturer.

    infomine.com. Good luck, I've got somebody in here peddling wear plate just about every week. Most of our business goes to the guy providing the best service (measuring, cutting, forming, etc) and best availability of plate.
  15. minerk

    EP oil and bronze gears

    No, EP oils should not be used with yellow metals. EP additives work by chemically reacting with the metal surfaces. This reaction is too aggressive for yellow metals, resulting in rapid corrosion.
See more

Part and Inventory Search

Back
Top