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- Users: EngineerTex
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Lifting Jig
Why are you using a 5:1 SF for the appliance? 5:1 is for the wire rope of the crane that is continually being wrapped around the drum and sheaves and then straightened back out again - something almost fatigue-like. This appliance is not experiencing that, is it? Will this be a dynamic lift...- EngineerTex
- Post #2
- Forum: Mechanical engineering general discussion
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Design Clutch for pen-like object
Mechanical pencils? Engineering is not the science behind building. It is the science behind not building.- EngineerTex
- Post #2
- Forum: Mechanical engineering general discussion
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Galvanised Flange Face
Have you contacted a media blast company? Someone in the know should be able to select a gentle abrasive that would remove the zinc and leave the underlying steel undamaged. Engineering is not the science behind building. It is the science behind not building.- EngineerTex
- Post #5
- Forum: Mechanical engineering general discussion
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API-6A/16A Weld hardness
What particular section does the engineer reference when he makes this claim? Engineering is not the science behind building. It is the science behind not building.- EngineerTex
- Post #2
- Forum: Mechanical engineering general discussion
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Galvanised Flange Face
Why can you not remove the galvanizing? Engineering is not the science behind building. It is the science behind not building.- EngineerTex
- Post #2
- Forum: Mechanical engineering general discussion
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Old steel designations
Generally speaking, the size of AISC beams are notated by a nominal dimension of depth, a shape designation and finally, a weight per foot in pounds. Without looking in any book anywhere, I would conjecture that these designations mean: 9C25; 9”nom. depth C-channel at 25#/ft 9C20 1/2; 9”nom...- EngineerTex
- Post #3
- Forum: Mechanical engineering general discussion
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Material for Moto Guzzi main bearing
Do you have the original, presumably failed, bearing? If so, have XRF (X-ray fluorescence) done on it. If you prepare the sample, sand it with SiC and remove all traces of anything that could have been deposited by the crankshaft, as that will give you a false reading. Engineering is not the...- EngineerTex
- Post #2
- Forum: Bearing design, manufacture and maintenance
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Prying Force on Bolt
Depending on what you are looking for, this is probably an elasticity problem. Before going into an analysis, you should fully understand the elasticity of a bolted connection. I say that because I assume that you want to know how much you can safely load the bracket and bolt together. With a...- EngineerTex
- Post #3
- Forum: Mechanical engineering general discussion
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Fastener weather proofing torque
1) What is the enclosure material? 2) Are you (re)designing the enclosure? 3) Is the fastener screwed into a hole that is tapped into the inside of the enclosure? Can the bottom of the hole be sealed before assembly if that is where the problem comes from? Engineering is not the science behind...- EngineerTex
- Post #8
- Forum: Mechanical engineering general discussion
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Fire torch warning... Pressure created by resistance to flow??
Ok. Now we have two different views stating why is incorrect. If I can boil down the first school of thought, which I believe is held by akkamaan, it would be the following: Because the energy imparted to the fluid originates inside of the pump, both flow and pressure are created by the...- EngineerTex
- Post #52
- Forum: Fluid Power engineering
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Extracting energy from low pressure flow
How much flow do you have? Can you accelerate the water with a nozzle and use a pelton turbine? https://youtu.be/uN_yPUC8vHM Do you have enough flow to be able to boost pressure with a ram pump, store the higher pressure in a tank and then extract energy from that with a higher-pressure...- EngineerTex
- Post #8
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Neither does the pump. That is the whole point here. All of the parts of the system convert energy. I will not be condescending and act like you don’t know that energy is neither created nor destroyed. I will, however, point out that you conveniently and, I can only assume, purposely ignore it...- EngineerTex
- Post #44
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Respectfully, I disagree. Identical engines are used in a wide variety of vehicles. Knowing that vehicle weight, tire size, rated approach angle, etc. are what dictate drive shaft size is an important thing to know. Knowing that the load on the end of the cable is what controls the cable...- EngineerTex
- Post #39
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Who knows? Even if desirable, such a thing is impossible with the prime mover (your hand.) It illustrates that even if your arm is capable of applying a force of 10 pounds, it cannot do so without something to resist that 10 pounds, similar to how a pump that can push fluid against all sorts...- EngineerTex
- Post #36
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Let's see how that works. Try this real-world experiment. Put your hand straight out, facing up and place a postage stamp on your palm. Now apply 10 pounds of force straight upwards to the postage stamp. Can you do it? Why not? You can raise your hand as fast and as hard as you like, but...- EngineerTex
- Post #25
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Sure there is — solely because between the positive terminal and the negative terminal there is an enormous resistance to flow - a nearly infinite resistor commonly referred to as “air.” You do understand that an infinite or nearly infinite resistor is still a resistor, right? That resistor is...- EngineerTex
- Post #23
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Try this: No woman on Earth will generate a baby without a man, ever. Nobody was arguing that. So this brings us to the crux of the discussion. There is no such thing as a voltage field without a resistance to current flow, though I’ll listen if someone wants to explain how you could have...- EngineerTex
- Post #22
- Forum: Fluid Power engineering
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Fire torch warning... Pressure created by resistance to flow??
Where is the problem here? Who would say that the resistor doesn't create the voltage? Get your video camera and prove me wrong. Take the battery out of your car and remove the giant resistor on it, i.e., take away the 9" air gap by using a 2" diameter copper bar. Tell me where the voltage...- EngineerTex
- Post #20
- Forum: Fluid Power engineering
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Vibration table for tests (7-200Hz) from extruded aluminium profiles bolted together - good idea (?)
If you're going to go with bolting, use Nord-Lock washers. Verify that the extrusions that you plan on using are an alloy suitable for welding, so that if bolting doesn't work, you can go back and weld it. But welding is very cheap. You will probably be able to find someone to weld it for you...- EngineerTex
- Post #11
- Forum: Mechanical engineering general discussion
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Mechanical operated hydraulic valve to electrical operated.
Many modular valve blocks have the ability to have sections of them replaced or have additional features added on. Do you have a schematic? Do you have a valve part number or a valve stack part number? Engineering is not the science behind building. It is the science behind not building.- EngineerTex
- Post #2
- Forum: Fluid Power engineering
