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

Search results for query: *

  1. Strider17

    Power Surge Protector 220V-60A

    All: Thanks for your replies. Further info: The washing machine has been replaced with analog type. The damaged oven heating elements were OK, no flashing lights, and there was 120V power to the circuit boards. There was no apparent lightning at the time...there much wind which...
  2. Strider17

    Power Surge Protector 220V-60A

    All: I need to build/buy a power surge protector for a 220V-60A Double Oven. Or, Plan B, something inside the oven to protect the control/display circuit boards at a lower voltage/current rating. Background: My elderly mother lives alone in rural area prone to power failures. The last one...
  3. Strider17

    Replacing odd-ball sized bearings from 1989.

    If you can find a bearing with equivalent load bearing capacity, machine a sleeve to to fit the housing. This would be much better than machining the housing and losing rigidity. Use Loctite on the sleeve depending on the housing material. The more you know, the more you know you don't know....
  4. Strider17

    Relationship between aluminum hardness and strength?

    Gentlemen: Is there a useful relationship between the hardness of an aluminum alloy and its tensile strength? Is there a general rule of thumb that can be applied? If so, does this relationship apply only within an alloy series or across some or all series? Thanks.... Terry The more you...
  5. Strider17

    Brushed DC Motor w/PWM Control

    Gentlemen: This is not my field, but I have had to pick up some of the load.... I have a brushed DC gearmotor, 300 in-lb torque, with output of 8 RPM. If the speed is reduced thru a PWM controler to 1 RPM, will there be any torque left for the load? Any guess as to how much? Thanks in...
  6. Strider17

    Shear Strength of 416 SST

    Gentlemen: I need help finding the shear strength of 416 SST @36 RC. Can anyone help? Hopefully with a quotable reference...Thanks Terry The more you know, the more you know you don't know....
  7. Strider17

    What is the power/torque lost through a u-joint?

    ...those still interested I found a source who has an empirically based formula. To= Torque Out Ti= Torque in a= Operating angle of U-Joint To= Ti*cos^2 a Also suggested for reference was an SAE publication " U-Joint and Driveshaft Design Manual". Thanks again to all... Terry The more...
  8. Strider17

    What is the power/torque lost through a u-joint?

    Gentlemen: I have been through 20+ of my engineering books and a web search and I cannot find anything regarding torque or power loss through a u-joint. Also, I am trying to calculate the radial load for a bearing adjacent to the u-joint. Can anyone direct me to a source of info or provide...
  9. Strider17

    How to Tell 400 Series SST from CRS?

    Gentlemen: Thanks for the tips. I will order some CuSO4 and Nitric Acid for testing. I have a number of bars which could be 1030, 1045, 416, or 430, based on receiving records. The sawman cut off the color codes.... Thanks again...
  10. Strider17

    How to Tell 400 Series SST from CRS?

    Gentlemen: Is there a simple, shop based, test that can be used to distinguish martinsitic SST (400 series) from CRS/Drill Rod? Hopefully something on the order of grinding wheel sparks, etc... Thanks The more you know, the more you know you don't know....
  11. Strider17

    Big Dig Boston ceiling collapse

    JAE: Thanks for the links...It does smell like a political decision... TL The more you know, the more you know you don't know....
  12. Strider17

    Big Dig Boston ceiling collapse

    Gentlemen: This is not my field but what IS a tunnel ceiling? Why are "decorative" concrete panels suspended over a roadway, mounted by anchors/rods/grout all of which are loaded in tension? Why go to the effort of putting large concrete elements in a tunnel with no load bearing...
  13. Strider17

    Helicoils in Aluminium heads

    I have done many VW heads with helicoils with much success. They are much better than the solid inserts. Use white grease on the tap, it will catch the chips and you don't have to pull the head or engine. The more you know, the more you know you don't know....
  14. Strider17

    What is the best engineering advice you ever received?

    Advice from my father (also an engineer) when I was considering careers: "There are two types of jobs in the world. There is the type where you take a shower before you go to work, and there is the type where you take a shower when you get home from work. You want the first kind...." TL...
  15. Strider17

    When Is A Chamfer Not?

    If you say "Break edge .xxx max" you are saying that zero is OK. If you allow no break on the edge, that is what you will get.... Terry The more you know, the more you know you don't know....
  16. Strider17

    Estimate Residual Welding Stress in Column Weld

    Greetings Gentlemen: I hope you can point me in the right direction. I am trying to estimate the residual stress in a weld. I have a machine with a central column which is a 9 C 20.0 channel welded to a 1/2 in X 18 in SQ base plate. The base plate is welded to the end of the channel all...
  17. Strider17

    Blown MOSFET on motor control board

    VisiGoth: Thanks for your reply. All suggestions above seem to have validity. I (as an ME) would never attempt a new design or redesign, but I do want to effect a change. I am trying to convince the EE's and management that there are alternatives to smoking control boards which slows the...
  18. Strider17

    Blown MOSFET on motor control board

    VisiGoth: I cannot just blidly change requirements without knowing there is a viable solution. Can you give me the name of a device, circuit, or method that I could refer to as an option? Thanks itsmoked: It REALLY smoked. Thanks for the tip. See further info below. Additional info just...
  19. Strider17

    Blown MOSFET on motor control board

    Gentlemen: I am working on a project that has a proprietary motor control board that is used to control 6 DC motors on a medical device. During development and in the field there have been situations where the motors have been connected wrong, wired wrong, accidental shorts etc which has fried...
  20. Strider17

    Non-standard fasteners

    Yes a Joke...I have a copy I got a year ago having lost my first one.... It came as humorous catalog page from a legitimate fastener supplier. Go to this site and go 3-4 pages into their catalog... http://www.metricscrew-toolco.com/newcont.html Metric Screw & Tool Co 9 Lake St. Wakefield...

Part and Inventory Search

Back
Top