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  • Users: bob1111
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  1. bob1111

    THOUGHTS ON DFL COATINGS. FLUKE OR WORTH IT?

    We have looked at adding DFL coatings to a few high wear parts. It requires that we lightly blast the materials with Al02 before coating. The main component in DFLs is Moly (same think in oil!) Just curious if these coatings are a marketing scam? I really do not want to waste my time and...
  2. bob1111

    STILL TRYING TO SELECT MATERIAL FOR TRANS. SHIFT FORK

    Here is the deal. We had pretty much settled on 8620 and then carburize it. Then we found out that 8620 is pretty much non-existent in flats. So now we are back to the drawing board... The part needs to be through hardened to around HRC 35 depending on alloy. The fork tips need to achieve...
  3. bob1111

    Help selecting alloy for small shaft. hard surface, low load

    We are making a simple shaft with a bearing tolerance OD to +/- .0002" We want to keep the entire part in house because pricing is a concern. We are looking very hard at 17-4PH H900 but it is only HRC 38-42 and we really need to be around HRC 50. The shaft is roughly 7/16 diam and 3" long. I...
  4. bob1111

    Pack carbing of low carbon steels.

    Per my other threads, we want to bring a carburize process in house for small volume work. Per our research, the ONLY one that seems safe enough to bring in is pack carbing by cooking the parts in a carbon rich powder and then either removing quickly for quenching in water or allowing to slow...
  5. bob1111

    Help selecting proper in-house HT procedure for 8620

    We are wanting to bring a case hardening process in house for some parts we are making. We are primarily looking at 8620 as the material. These are auto transmission parts. We would like to buy the material in the pre-hard condition (125ksi), machine the parts, then apply a surface hardening...
  6. bob1111

    Help selecting high stiffness material w/ good fatigue life

    We are working on a shift fork for a transmission. The OE part is an unknown steel alloy. Have not got everything tested yet but seems to be around RC35-38 and the shift paws that have all the sliding friction seem to have some type of hard silver coat on them that is around RC65. I grinded...
  7. bob1111

    DAQ HELP WITH SELECTING CARD FOR LOGGING SCOPE / LABVIEW

    What I need: A scope system that will hook up to labview or comparable with 4 channels and ability to sample at least at 50M samples/sec or so. I will need to log and compare data from separate channels recorded simultaneously. I also will need to output another frequency that will sweep from...
  8. bob1111

    HELP FINDING A SUITABLE METEL FOR METHANOL SUBMERSION

    We have an automotive fuel system part we need to machine that will be subject to 99% Methanol. We are open to nearly any metal as long as it has a high level of machinability and is not an exotic (expensive) material. We have considered 300 series stainless and a few Brasses. The OEM part we...
  9. bob1111

    REALLY NEED HELP! METAL SELECTION TO USE IN METHANOL FUEL.

    I could REALLY use some help here. We are designing a new fuel system part for the auto industry that will be used in Methanol. many parts are brass but this can corrode if left in Methanol for extended periods. With our new part, we have considered Stainless Steel for its reduced corrosion...
  10. bob1111

    NEED HELP FINDING A FAST ACTING AND EASY WAY TO AUTOMATE VALVE

    We are looking to automate a butterfly valve and it looks like we may want a type of servo control. The motor only needs to rotate 90* but needs to go from close to open in .1sec as well as be positioned anywhere in between very quickly. We do not "need" to know the actual position but just be...
  11. bob1111

    need to throttle water quickly and automated

    We have an application where we will need to throttle water flow very quickly and precisely. Specs are 40-60psi, 30-40gpm, and full open to full closed in .1sec or less with ability to precisely tune in partial openings. We need a rather economical solution here. We have considered a poppet...
  12. bob1111

    Eddy current dyno DIY. help with absorbers and sensors

    We are going to build another dyno, but an eddy current this time around. We are looking at dedicated brakes right now but have read a few threads about using an induction AC motor and running DC to it as a brake. I was curious if this would have any chance of working for 200HP? Regarding...
  13. bob1111

    2-stroke tuning, squish velocity for race fuel and methanol

    Any hard core 2-stroke tuners here? We are doing some extensive research on head designs for high performance 2-strokes. Mostly looking at MSV numbers, squish band dims, etc. We are looking to tune for specific fuels and though the MSV can be calculated, it really means nothing if you don't...
  14. bob1111

    Clutch plate friction materials

    We are considering development of a new multi-plate wet clutch pack and curious what friction materials might be available to increase friction over an OEM type friction material? We will have the increase the power holding ability by 3x in this clutch. We cannot increase the diameter of the...
  15. bob1111

    Could we discuss piston mfg methods and designs

    We build race engines here and considering stepping into custom piston mfg. This may or may not be feasible but it has brought on some new questions as to piston design and mfg methods. I would like to learn the forging method to creating the rough impressions of a piston. We are a machine...
  16. bob1111

    Trying to learn Nikasil or Electroplating for cylinder bores

    We have a part here that is an automotive type bore that requires a nickel silicon carbide coating on the inside of the bore. This is typically done by electroplating I believe. We would like to look into doing this in house because the prices for this service are ridiculously high. Could...
  17. bob1111

    Looking for production company for Nikasil or NSC coating bores

    We have a customer looking to produce a small bore Al cylinder from casting. The cylinder will require precision boring and plating. Can anyone recommend a company that specializes in doing these coatings as a production type setup? Probably will run around 100 at a time. maybe 50 at a...
  18. bob1111

    Info on Aluminum foundry starup.

    Not sure if I have the right area or not. Looking for information about Al casting of intricate parts like 2-stroke engine cylinders. We have zero experience on the subject but are a multi axis CNC machine shop with 3D digitizing capability. We had thought that possible we could use a 3D...
  19. bob1111

    Really need help wtih o-ring comp for engine application

    We are designing a small engine cylinder head that will be seated with a rubber o-ring. There are similar designs already out there that work fine. Problem is deciding what o-ring composition to go with. Most people have no idea. So far, we are looking at Viton but there are several...
  20. bob1111

    Help finding tutorials, user forum for Catia Machining

    Our company may seek to try Catia's machining abilities for multi axis lathe and 4-5 axis mills. Just curious where I can get some useful info on machining in Catia? We currently use another program to create toolpaths but recently was decided that an all-in-one approach might be best. Any...

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