# Questions tagged [shafts]

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### Shaft undergoes torsion and centrifugal stress

I use this model to get the tangential and radial stress formulas but I want to examine a system also undergoes a torsion under constant speed. I'm a little confused at this point, do I need to point ...
40 views

### How to build bench with a rocking top rectangular section?

I want to build a metal bench, maybe 2m x 50cm x 40cm(W). A bit like a weights bench. The flat top rectangular section you sit or lay on should rock maybe 30 degrees to each side. What parts would be ...
66 views

### Why aren't tricycles use cardan shafts?

All the tricycles I saw use chains. It looks far from being efficient comparing the regular bike: Notice how long the chain is. They have to use 2 chain idlers. The back path is inside the curved ...
69 views

### How to adapt a threaded drive shaft to a keyed shaft (for use with V-belt pulleys)?

I am sure there is a very simple answer to this question, but with no formal mechanical engineering education, I don't know what it is. I have a 2.5 HP, 3,450 RPM continuous duty electric motor with a ...
91 views

### Is there a special wrench used to remove this servo tachometer?

I tried using a pulley puller with moderate force to remove the tachometer but it didn’t seem so budge (although I didn’t use heat to soften potential adhesive inside). Looking at the shaft I can see ...
153 views

### How (or should I) to connect a D-shaft to a load, through a bearing?

I have a gear with a D-shaft that is intended to directly drive a turntable. Something relatively heavy at very low speeds and with not much torque, if it's important. I really don't want the gear to ...
51 views

### Are double universal (Cardan) joints exactly constant velocity?

Some double universal joints use a centering joint to ensure that the angle of the input and output are equal to maintain a constant velocity through the joint. From what I can tell, this centering ...
14 views

### 3" shaft high wear

A 3" drive shaft 27" long with keyway. Application 40 ft long mixing tank Limestone 40% mix with water RPM 60, temperature 70 °F - 200 °F Shaft supported by hard iron static bearing 1045-...