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  1. H

    Help on 8X12 Harbor Freight Lathe

    There is a remote possibility that reversing switch is bad. Are you able to check it.
  2. H

    Newbie needs advice about a lathe

    I know its off topic but had to respond. I had forgotten about those days and you are very correct. It may well be when and where it was first initiated.
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    Help on 8X12 Harbor Freight Lathe

    Look, sometimes these things are a matter of time and patience. The drum switch is tricky in that there is internal wiring to it that flips current connections at the same time. And to make matters a little more confusing the older drum switches have the ability to change that internal wiring...
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    Help on 8X12 Harbor Freight Lathe

    I recommend you start with the motor. Most of the time you will find the connection diagram for the motor on the shell. If one exists note the reverse terminal and forward terminal. If it has a capacitor start it should be indicated on that diagram. If its not there you will need to get...
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    Newbie needs advice about a lathe

    Yes, these words are derived from slang words from those who play video games. They do not use Latin or Greek (few do) and it becomes part of the culture. And almost every young person plays video games. Language is changing and reflects the culture it is in. And it is why science uses Greek...
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    Looking for input on a cylinder block corrosion issue.

    Petro plastics products are from the field of organic compounds and can be made acidic, basic or neutral they can if improperly used cause all kinds of corrosion. They are applied as a liquid and usually hardened with time. Their use is predicated on a chemical reaction occurring. Hopefully...
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    Almost burned my shop down and didn't even know it

    Not true! Both systems are equally dangerous. Lower voltages tend to paralyze the muscles and as a matter of fact current of less then 75 ma will kill you if it gets across the chest and heart. Both circuits 120 60 Hz or 240 50 Hz require the same diligence when working with them. Electrical...
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    Forced Air Diesel Fuel Burner

    Yes, actually that pressure and a little more to account for what is called piping loss. The horse power required to do this is part of the parasitic draw on the cycle. Technically you would also add to the flow about 10% over the steaming rate to account for blowdown. The parasitic draw also...
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    Forced Air Diesel Fuel Burner

    Flow begins when the vessel reaches a pressure above atmospheric which is 14.7 not before. No pressure differential no flow. The pressure is a function of pv=mrt. Heat just raises the state properties of the fluid. Each tube has to be calculated for fitting + entry losses + friction losses...
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    Forced Air Diesel Fuel Burner

    No the working fluid does not supply the energy for its flow it always moves to the low pressure it sees. And this is a design function barring a stuck check valve, control valve, or a broken cap blocking a tube. Pressure drop is key in fluid flow. Flow is always from high pressure to low...
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    Forced Air Diesel Fuel Burner

    You are correct boiler tubes are based on surface area required and mass flow through them. Unless forced circulation is involved the tube area is designed for a range of velocities and is a critical calculation if thermal differences are driving the flow as in many boiler tube furnaces. On...
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    Looking for input on a cylinder block corrosion issue.

    You might be interested to know that the locktite fluid compatibility chart has a special exemption for potable water. Possibly because of the chlorine or other additives I would guess as potential problems. This loctite is not on the list. All other types of water are more tolerable to a...
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    Looking for input on a cylinder block corrosion issue.

    It is very difficult to ignore the observation that the corrosion is occurring where the loctight is located. What you might consider is asking locktite if there are compounds or metals that would enhance corrosion and they would or should know. The corrosion is localized which looks like...
  14. H

    question about aluminum shrinkage

    If you are old school -- prior to calculators and digital aids-- the pattern is laid out with a shrink rule and the dimensions of the scale account for the shrink of the metal upon cooling. The dimensions come from the casting drawing in finished form. Not sure where you would get a shrink rule...
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    Electric car plant

    What is said and what is thought is the basis of established policy. It goes back to the fundamental principal that laws are based on society mores. Princeton University should know this and too accept the fact what we think has no significance ignores the fact that we vote for those who...
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    Electric car plant

    The problem with this type of calculation is the boundary conditions when comparing these systems. There is no way electricity is produced and distributed at 100 percent efficiency. Even windmills have theoretical losses as they can not totally extract all of the wind energy. On a side note...
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    Electric car plant

    So cant resist doing the math-- Lets say my gas auto is 20 % efficient. Its probably higher. But a 6 times greater for an electric vehicle is 120 % efficiency. Now that number is a bit questionable. My experience is a kw cost 15 cents and its going up another 14% due to rate increases. I...
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    Wanted I need a part made...

    Bill is absolutely correct. I have never seen in any engines diesel or gas any exhaust system which had aluminum parts. And I have fitted thermocouples in manifolds to ensure the gas temperatures stayed below certain values like 1100 degrees F. The correct fix is to pull the headers and...
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    Wobble Plate Air Compressor

    I have had some experience in utilizing atomizing burners with steam and air. The air compressors for these systems are specially designed for an even air flow. They are also expensive. You can take out some of the pulse by using a storage tank the bigger the better. You can also add a...
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    looking for advice on a boiler project

    Not a good idea to wait until no steam comes out. You could end up warping the metal and destroy it. Low water cut off is what you need. HMEL
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