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Recent content by umreng

  1. umreng

    Overhead Traveling Crane Overload

    I am looking for guidelines to follow and/or requirements to satisfy in the event of an accidental overload of an OHC hoist. (I am aware of the ASME Engineered Lift criteria which includes a maximum frequency of 2 such lifts in any 12 month period and required pre-lift inspection, post-lift...
  2. umreng

    Anchor Bolts, Base Plates

    Thanks for two great responses! I have a couple of follow-up questions for dik and evelrod. 1. You both agree, as I understand your responses, that the leveling nut approach is advantageous in project cost and project schedule. (I agree with this.) I get the feeling that you both feel that...
  3. umreng

    Anchor Bolts, Base Plates

    We are installing a new 60 ton overhead crane runway, and the structural engineer recommends a leveling nut be installed beneath the base plate to achieve a level structure and hold the structure in place prior to tightening the anchor bolts and grouting the base plates. I always thought it was...
  4. umreng

    4" 150lb threaded Flange

    Call a Vendor who sells forged steel pipe flanges. The Vendor can furnish you excerpts, dimensions, ratings, etc.
  5. umreng

    Demagnetize a Railcar

    If you really want (need) to demagnetize the entire railcar, you should read the article at the following link: http://www.redlandsfortnightly.org/subm.htm During WWII, submarines and other ships were actually demagnetized to help them avoid detonating submerged German mines armed with...
  6. umreng

    Safety Boots ANSI Z41 PT99

    Our safety rules require safety boots which meet ANSI Z41 PT99. We do not have a copy of this standard. (It is quite pricy.) Does anyone have a copy they can let me use for a short while?
  7. umreng

    Cracking problems in Heat treating 4340

    Thank you all very much for the prompt responses and technical insight & information. The following is in reply to the questions which have been raised by the responders: 1. My original post of July 29 included all of the information on the drawing. Quench medium, draw temperature, etc. were...
  8. umreng

    continuous casting of steel - jerking

    During continuous casting, there should always be a lubricant filled gap between the mold surface and the strand surface. The lubricant may be mold powder in the case of slab casting or a special liquid (rape seed oil) in the case of billet or bloom casting. The lubricant is an excellent heat...
  9. umreng

    Cracking problems in Heat treating 4340

    I have some critical service pivot pins in a heavily loaded piece of plant equipment for which I am having spare pins manufactured. My original equipment supplier furnished details of the pins and associated parts at time of order placement several years ago. The drawings include the required...
  10. umreng

    I would gladly pay next Tuesday, for Safety Industry mentoring today.

    Try the Dodge Report for projects in the U.S. For worldwide search, try United Nations Information Center Worldwide (http://www.un.org/aroundworld/)
  11. umreng

    Material Storage Rack Compliance

    See www.osha.gov. If the area in question is a construction site, see Part 1926. If the area in question is not a construction site, see Part 1910.
  12. umreng

    Tool Steel

    Thanks for the information, fritzcoinc. What temperature is your sheared material? You are using a hot work ("H" Type) material that is commonly used for hot shearing (~1300-1700 degrees F.) steel bars and plate. My only experience in cold shearing has been an S-7 (Shock Load...
  13. umreng

    Dry Lube for High Precision Bearing

    Try Plesh Revolube sealed bearings. (www.plesh.com) The graphite based lubricant is a solid that fills the cavity between the rolling elements and the inner and outer race.
  14. umreng

    Steel pinion vs. plastic

    There are many engineered plastics on the market that can be (and are) used in successful gear and pinion applications. The important thing is to look at the maximum expected actual beam load on the gear teeth at operating temperatures. The lubrication is also very important from an operating...
  15. umreng

    Tool Steel

    Thanks for the help, maui and unclesyd. This is exactly what I needed (and more)!
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