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  1. DesignerMike

    Valve clearance changes as engine heats up.

    I am working on a motorcycle engine and got into a discussion about how the valve clearances will change as the engine gets hot. It's on an inline 4 cylinder with 5 valve per hole. (small valves) His claim was that the valve stem gets hot (expands) and reduces the clearance with the camshaft...
  2. DesignerMike

    Air driven circulating pump

    I'm looking for a small (1/10 HP) circulating pump, centrifugal inline if possible. I'm looking for air driven due to the fact it needs to be XP class1 div1 Physically it needs to be TINY (about 3.5" diameter and about 5" long total) I'm replacing a grundfos pump that was not XP. We spoke to...
  3. DesignerMike

    Drive heating elements with a VFD

    Long story, but I am working on a little R&D project that requires a immersion heater total draw of about 50 amp. The heater will be installed where there is normally a large extrusion pump. There is a VFD wired to the pump via plug/recepticle. Question is can I drive the immersion heater...
  4. DesignerMike

    hydraulic relief valve to cut torque

    I have a high torque low-speed hydraulic motor that will produce excessive torque in a new application. I can't cut the system pressure, and prefer to re-use the motor I have. NOTE: It's a closed center constant pressure system. I believe I can put a relief valve inline before the motor to cut...
  5. DesignerMike

    Watt..BTU-horsepower confusion

    I don't do these calculations often enough, and would like someone to verify my conversions please. I need to heat a 150 gallon tank of oil from ambient to 300 deg F. I come up with 250,000 BTU I want to hit temp after about 1 hour. I have a single shell, insulated, SS tank (bottom head not...
  6. DesignerMike

    AL6XN tubing

    I'm looking for some sources of Sanitary tubing in AL6XN. My first quote was a little shocking. I know it's a lot more, but that is INSANE! Any suggestions? I would need the tubing, fittings, and the welding disposables.
  7. DesignerMike

    Air motor tachometer

    I am designing a unit with an adjustable speed air motor (Gast 4AM). I need a tachometer, only mechanical (no electric on the unit. Gast doesn't make an add-on, but I have seen them on other units. The tachs I have seen replaced the idle side bearing cover with the tachometer. Any ideas...
  8. DesignerMike

    Locknut socket? What are they called??

    One of my vendors works on a bunch of different drive shafts and housings. He is constantly running into bearing locknuts he can't get a spanner wrench on. Most of the nuts are N-07...N-11 sizes. I always just make what I need, but often times they are not very elegant, and a pain to make if you...
  9. DesignerMike

    Thermal calculator, or simple conduction formula

    I'm looking for a on-line thermal conduction calculator, or simple spreadsheet to do some simple calculations. usually I'm looking at sanitary SS tubing (.065" wall) that is either jacketed with hot water, steam, or chilled water. Occasionally I am using tubing routed through a tank to maintain...
  10. DesignerMike

    Heat conductive putty

    I'm planning on running steam through a coil of copper tubing to heat a small SS hopper. I will have insulation on the outside, but I'm sure I will get poor heat transfer without some type of heat conducting putty. Mcmaster carr offers one type, but it claims it gets very hard when cured. I...
  11. DesignerMike

    Am I calculating the heat gain correctly?

    I have a customer with a DI water system. The cold loop (ambient temp) keeps heating up during times of low usage (nights and weekends). I predicted this, but they thought it would be insignificant. I need to add a cooler to the loop at some point and am working on sizing it. I have only three...
  12. DesignerMike

    non-stick coating SS x adhesive

    I'm working on a new project for an adhesive manufacturer. Much of the equipment I am replacing is covered in this nasty black layer of glue. The stuff is somewhat water soluable. I noticed that many of the SS tubing parts clean up very well, but the tanks and framework are filty. What is the...
  13. DesignerMike

    Non-stick coating for SS

    I'm working on a new project for an adhesive manufacturer. Much of the equipment I am replacing is covered in this nasty black layer of glue. The stuff is somewhat water soluable. I noticed that many of the SS tubing parts clean up very well, but the tanks and framework are filty. What is the...
  14. DesignerMike

    Looking for an elusive stress formula

    I have been digging through my old text books looking for a formula (that I used about a year ago and misplaced). I need a simple formula to find stress of a flat square plate, fixed on edges, with a pipe welded to the center. There is a relatively large moment force on the pipe, and I know the...
  15. DesignerMike

    Where can I find a Stainless Steel hydraulic jack?

    I'm looking for a hand or foot operated SS hydraulic jack, long stroke, light duty (less than 1000 pound cap). Something like you would see on an engine hoist or a pallet lift. Much like a McMastercarr 2923T51. I may be able to use a SS cylinder and a SS hand pump unit seperates. Thanks for the...
  16. DesignerMike

    Where for standard fitting dimensions

    I have dimensions for almost all the fittings I'm using except for a threaded union Female X Female, 1 1/2&quot;NPT. I need to squeeze a threaded union through another pipe for assembly...and the pipe does not strech very much :<) Where can I find dimensions for a standard threaded union (I...
  17. DesignerMike

    Fiberglass tank fittings

    Today I came accross a fitting that I have not seen before. The fitting is on a fiberglass tank (I primarily use SS). They use a triclamp style, and size face gasket, but the OD of the flange is much larger than a standard triclamp. Also, the &quot;clamp lip&quot; and flange are much thicker...
  18. DesignerMike

    Where are all the models?

    I just switched jobs, and I'm considering converting to Solidworks from Inventor. There are some awesome model sharing and code sharing sites for the Inventor people. ie www.cbliss.com many of the parts are iparts (or design parts) and I have downloaded hundreds if not thousands of models of...
  19. DesignerMike

    Hard time finding metric material

    I am looking for mechanical tubing, 50mm OD x 10mm wall in 316LSS (or comperable). I need a close tolerance on the OD with a descent finish (20-30 is ok), the ID can be less precise. Didn't have any luck with my normal suppliers, so I'm asking the experts. Thanks
  20. DesignerMike

    Anyone with some good friction information?

    I am looking for a table with some co-efficient of friction information. Just close approximations. Simply dry clean Stainless steel on chrome plated steel (or some other combinations) NO LUBRICATION, chrome is 10-20rms, Stainless is 40-50. I'd rather not do any testing if I can get away with...

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