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 cowski 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: *

  • Users: TheRocketScientist
  • Order by date
  1. TheRocketScientist

    Fitting two plastic parts

    They sell screws in your neck of the woods? Or can't you penetrate the disk for some reason?
  2. TheRocketScientist

    Lithium Iron Phosphate Battery: 200 mile automobile range?

    Does this look legit to anyone? I smell DEEP AROMA of Bullsnort. http://www.evperformancewarehouse.com/index2.html and http://www.usunitedenergysystems.com/index2.html Lithium Iron Phosphate (LiFePO 4) batteries?? "Our SOLARIS EV® All Electric Sports Car Range: 200 to 300 Mile Per Charge...
  3. TheRocketScientist

    240V AC Motor Fail to Start counter/ 120V lacks N wire

    I have an AC motor of about 1.5HP, run with 240V AC single phase. The motor is about 300 ft from the controller, which switches only one leg of the 240V. At the motor, then, I have a ground wire, one leg always hot, and one switched line. Typically on/off abut 60/40% on a 5-minute total cycle...
  4. TheRocketScientist

    Preparation of stainless steel for Loctite threadlocker

    Interference fit on SS fasteners is asking for a LOT of galling issues. SS galling leads to siezure and permanent mating [welding] of the nut and screw, and it must then be twisted off and discarded. That would be great IF it happened after your desired torque was attained, but typically it...
  5. TheRocketScientist

    Understanding Drawings

    I had trouble interpreting a drawing when working at "Commercial Machinery Fabricators" corporation. I am a degreed engineer with a background as mechanic, machinist and machine builder as well... between jobs at the time, I was hired as a welder, then moved to the lathe when the lathe operator...
  6. TheRocketScientist

    Preparation of stainless steel for Loctite threadlocker

    Cyanoacrylate [Krazy (R)] glue comes to mind. I sometimes use that for a threadlocker when retention is more critical than a possible future dismantling.
  7. TheRocketScientist

    TEK screws- seeking #2 drill tip exact specs

    Not sure we can change the screw type. There is a lot of managerial inertia there. That screw is used in a lot of other applications, NONE of which will get a pre-drilled hole, as it's not practical. As for these screws exhibiting a poor drive/strip ratio, that's not been my experience with...
  8. TheRocketScientist

    TEK screws- seeking #2 drill tip exact specs

    I am looking for exact specifications for the #2 drill tip of a TEK type self drilling screw. I am securing a plastic block to 0.090" thick aluminum extrusion with 3/4" long stainless steel #10 TEK type screws. Currently using #10-16 screws with a #2 drill tip, which strip at about 70-80 in-lbs...
  9. TheRocketScientist

    ball / roller bearings wearing shafts

    Sure, how's this: http://s19.photobucket.com/albums/b172/Rocket_Science_442/?action=view&current=7297_SHAFTS12.jpg These were 1" shafts to start with Tries set screws at 60 and 120 degrees, Loctite on the set screws and the shaft, PEER brand piching collars [fail], eccentric rings, etc. all...
  10. TheRocketScientist

    Grain Bin Overpressure Coefficient

    Is there a reason the structure can't be round? That just seems like a bad idea to me to try to contain a lot of pressure [e.g. at the bottom of the structure] with a square structure having flat [at least when built] walls. Seems like they would want to bulge out and become round. Therefore...
  11. TheRocketScientist

    remote 240V AC site has no ground wire

    Yes, the conduit that enters the earth is steel. It runs from a plastic enclosure on the wood wall down into the ground to an undetermined depth. Here in Michigan [USA], the soil is always quite moist, so it should have great earth contact. Interestingly, the conduit that arises from the ground...
  12. TheRocketScientist

    remote 240V AC site has no ground wire

    Test wall outside the building was wired by others before me. From the building come 5 wires- 3 are L1 L2 L3 of 3-phase 240V AC, a 4th wire serves as a Neutral for the 240V AC which gives 125V AC off 2 legs and 210V AC off the 3rd "crazy" leg. These come from a known breaker panel in the...
  13. TheRocketScientist

    Control bus- can a loop be used?

    OK, good, some configurations do support rings. As for the type of control, let's say similar to VFD- or specifying a position or other operating parameter via a 1-10V signal [subject to noise], or 4-20mA type signal... or the digital equivalent. Basically, provide half the control signal...
  14. TheRocketScientist

    Control bus- can a loop be used?

    Suppose one wishes to control a series of electric motors via a control bus such as serial, ethernet, RS232, whatever... can these devices be arranged in a loop? Think of an electric fence around a field... with the control signal being sent out both directions down the fence... each post...
  15. TheRocketScientist

    575V 60 Hz 3-ph 1HP motor- any use for it?

    I have a nice new 3-phase motor. However, because it's 3-phase, it has limited use around the house. Also, it's 575V [and appears to not be re-wireable for other voltages]. Rated 1HP. Any use for this thing? Dummy motor for 1ph => 3ph converter? I guess it can be run on 480V, but torque will...
  16. TheRocketScientist

    C shaped spring

    I think not. Are you referring to a device that holds a broom handle to the wall? Perhaps similar. I was thinking more of a wireform [circular cross section] wherein the springiness derives from forcing the ends of the "C" closer together or perhaps further apart. End action not unlike a simple...
  17. TheRocketScientist

    C shaped spring

    I have a vertical panel which turns about a vertical axis somewhat less than 90 degrees slowly from one position to another. I am envisioning a spring, shaped something like the letter "C", laid horizontally, perpendicular to the panel's vertical axis of rotation. At each end of the C, a...
  18. TheRocketScientist

    Countersunk Socket heads binding on initial removal

    "My initial thought is that this is not a problem, just the way it is." - there you go, it's only a problem if defined as such. The flip side of that coin is, it's a FEATURE that prevents loosening during normal use. Perhaps the field service guy needs the right tools. The handheld hammer...
  19. TheRocketScientist

    gearbox torque?!?!?

    Here's one version of a peristaltic pump: http://www.ledebuhr.net/pumps/index.php?gclid=CPHp5v7Q35oCFQoMDQod608DzQ you might use a small gearmotor and a crankshaft and rod to move the syringe plunger. Pretty much any available small gearmotor would do that task. Syringe speed would vary with...

Part and Inventory Search

Back
Top