6

The image shows what is often known as a zerk fitting, aka a grease fitting. The ball seals the passage from the outside to the internals which require grease. A grease gun with a properly sized connector will snap onto the zerk fitting. The gun is used to pump grease under pressure to the area described in the image as "no space, grinds," likely ...


6

It approximately means it is allowed or forbidden to have scratches at the place of round. When you are making cylinder surface you can to do it many different ways: milling, welding, soldering. In one case must be strong requriment for smoothness of surface (for example in bearings need to minimize friction). In other cases it is allowed to have scratches (...


5

I think it might be shorthand for a kinematically constrained design. It is the "This height gauge has three points of contact with the surface plate which makes it kinematic." which makes me suggest this interpretation. I also found a link where they seems to equate a "kinetic mount" to a mount that is "is fully constrained, but not ...


5

Split system air conditions (heat pumps) are refrigerator based systems. The two tubes you mention transport refrigerant from the compressor in the outdoor to unit to the indoor unit & return it from the indoor unit to the compressor in the outdoor unit, in a closed loop. Water is removed from the atmosphere by condensation, by the indoor unit. This ...


4

Imagine you were driving a car along the path shown in a cross section view of the radius - you need to make a 90 degree bend, and you need to stay inside the cones that denote the tolerance band. In the first image, you find yourself about to hit the cones, so steer sharply left, then almost hit the other cones, so steer right, left, right etc. In the ...


3

Regarding the first question: why 1 ship is more efficient that 100 smaller ones. if you did some research I'm sure you'd find that one large ship probably uses about the same steel than a 10 smaller ones capable of carrying the same load. See evolution of container ships. A ship 200x20x10 meters could transport about one tenth of a ULCS (which is 400x59x16)....


3

I don't want to spoil the fun of solving this for yourself so I offer the following suggestions: Redraw the assembly with all edges, including the hidden edges, shown as dotted lines. Draw solid lines on all the intersections. Join up any vertices which form edges not on the outer surfaces of the assembly. Count the faces. Step 3 is the only tricky bit. In ...


3

The impulse causes lateral acceleration of the rod and rotation of the rod. $$ P=m\frac{dv}{dt} \quad \text{for lateral acceleration}$$ $$ P=I\frac{d\omega}{dt} \quad \text{for rotational acceleration}$$ We calculate the net acceleration for each point along the length of the rod and after multiplying that by the density of the rod we get the forces' acting ...


2

The chart shows the maximum power with the throttle wide open. You can run at lower powers simply by having the throttle partly closed. If you want to use a low power output like 0.24HP, you will probably need some sort of automatic control system to keep the RPM down to 2000. A simple throttle lever with manual adjustment might be too sensitive to adjust ...


2

You have the right idea using a shoulder screw. In between the two pieces, use flat washers and a springy Belleville washer. A Belleville washer, also known as a coned-disc spring, conical spring washer, disc spring, Belleville spring or cupped spring washer, is a conical shell which can be loaded along its axis either statically or dynamically. A ...


2

The topics necessary warrant their own books and each topic is sufficiently large that the books already exist and are large already, so combining them into one book would mean you could not carry it. The logical solution is to have books for each topic,: mechanics, thermofluids, tribolgy, control etc and you combine what you need according to the problem ...


2

In ASME Y14.5:2018 5.16.2, the term reversal is used in the definition of CR: The part surface shall be a fair curve without reversals. The term is not defined. It probably means that the curvature sign (measured in 'some' plane) doesn't change as figure shows. For your information, in ISO GPS ('Geometrical Product Specification') tolerancing, the ...


2

If I hadn't messed up understanding your idea then you can connect all rods to achieve the desired result. I've considered two bars connecting to maintain all rods paralel to each other. The starting position will be with Rod A and Rod B are inactive (position 0-0) and rod Y will remain in $Y_0$. The intermediary position Rod A or Rod B will be active, and ...


2

If you consider the base concept of material used versus available volume for transport, a smaller vessel will have a poorer result. A water craft capable of carrying one container will use a certain amount of material, call it c and assign the value of one. This imaginary assignment is containers divided by material, equal to one in this example. The next ...


2

Instead of a Servo, this could be very easily be done by the combination of a spring and a linear magnetic actuator. The downside is, that the setup needs a minimum weight of the item to overcome the closing spring. Upon detection of the hand, the actuator retracts the locking bar and the weight of the item pushes the door open against the spring. As the ...


2

If you look at some common vending machines (I'm talking about the ones that hold snacks), They dont use a servo. Instead they have a motor turn a screw/coil continuously until the purchased item pushed along drops from inside the coil, tripping a simple sensor (like a limit switch) which tells the motor to stop. Feedback ensures the purchased item is ...


2

I'd personally go with Magnetic actuators, as those are highly reliable and can flip between their states extremely fast. As they are providing linear motion in a rather short range, you would need some lever on the hinge, but the part itself can be the hinge. Most magnetic actuators also have a rather small build volume, so the actuator might even be ...


1

The indoor coil cabinet has a catch pan and drain. The installer has to connect a drain pipe to the cabinet and then get the water outside somehow. Common options are to tie the pipe into a house drain (or drain vent line), gravity drain the water using a separate pipe to the outside, or collect the water in a small tank and pump it outside or into the ...


1

You have to remember that you can control independently (or with a fixed gear ratio), the rotational velocity for each roll. So, in order to decrease the tension, what you do is you decrease the rolling speed progressively in the output zone. A very similar concept which is under the same restrictions, is the belt pulley system. Below it shows the tension ...


1

Of the 5,211 container ships of 2018, 19 <500GT, 2,213 between 500≤GT<25.000, 1,538 between 25.000≤GT<60.000 and 1,441 are ≥60.000GT.  Source: Equasis.  So the majority of container ships (72%) were below 60,000 DWTs.  This comes down to supply and demand. No point in sending 11,000 TEU vessel to ports with 1,000 TEU requirements.   Feeder container ...


1

See https://en.m.wikipedia.org/wiki/Kinematic_coupling A kinematic coupling is constrained in (only) 6 degrees of freedom.


1

These terms are difficult to define: depending on the application, functions, types, moments, quantity, quality, etc. For this reason, when speaking of these terms a series of conditionals are specified that end up being regulated by some institution (For example: ISO, ANSI, EC, CE, etc.) Then, you can find, for example, "safety" in machine ...


1

Bioreactors: Process and Analysis, by Tapobrata Panda https://books.google.co.uk/books?id=HVGSfMa062kC "This book also covers the mechanical design considerations for the various kinds of bioreactors."


1

Gimbals are the classic solution for this: https://en.wikipedia.org/wiki/Gimbal And if you don't need any roll, you can omit one of the gimbal rings, in which case a pan/tilt mechanism is sufficient (often sold for photography.) You might look for a gimballed gyroscope toy and start with that. (Flight quality gimbals are expensive.)


1

Perhaps a "turntable bearing" also called a "lazy susan" bearing. Something like this one: https://www.amazon.com/Square-Inch-Susan-Turntable-Bearing/dp/B00ZSQSWTM


1

Take a look at a silicone gun mechanism. Simple and practical and does exactly what you are trying to invent.


1

Look for overrunning clutch or power transmission elements. You may find a lot of info in Ringspann site: Ringspann power transmission section Or here: Ringspann catalogue


1

The arrangement on the left is often used for fully floating hubs on vehicle axles, as the end float is easily set and controlled.


Only top voted, non community-wiki answers of a minimum length are eligible