Capt Spark

no idea what you want to know, but pressure and velocity is related by Bernoulli's eqn which can be found easily on the internet.

See Bernoulli's Equation: <a href="https://en.wikipedia.org/wiki/Bernoulli%27s_principle" target="_blank" rel="nofollow noopener noreferrer">Bernoulli%27S Principle</a>

or thru this: <a href="https://www.princeton.edu/~asmits/Bicycle_web/Bernoulli.html" target="_blank" rel="nofollow noopener noreferrer">Bernoulli's Equation</a>

go thru Bernoulli's euation (<a href="https://en.wikipedia.org/wiki/Bernoulli's_principle" target="_blank" rel="nofollow noopener noreferrer">Bernoulli's Principle</a>). This is all about conservation of energy.. if one component increases, other should reduce.

Can you attach a simple diagram & loading pattern / direction? It will be helpful to comment anything

true.. I agree completely. If there is any chance of even a little misalignment, a flex coupling is a must

why so? flange coupling needs complex modification to the shafts and is obviously a costlier arrangements with bolts. Do you find any reason why it is better than the simple...

Key is definitely a simple arrangement. And with this numbers, I think the calculation goes like this: F=64000N-mm/100mm=640N shear stress s = 640N/(80mm*5mm)=1.6 MPa (assuming 5 mm wide key) which...

see the amount of the torque to be transferred. if it is not so high, key / spline may be fine. for high torque transfer, flange is better. It give...

Sorry if it is a repost to someone, but wanted to share this link as there are lots of good lecture series uploaded on youtube by NPTEL, it may come...