Selecting the Right Gearbox for Rotating a 500kg Engine Manually | Expert Advice

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Discussion Overview

The discussion revolves around selecting an appropriate gearbox for manually rotating a 500 kg engine assembly using a steering wheel. Participants explore the mechanical requirements and considerations for this task, including torque calculations and safety mechanisms.

Discussion Character

  • Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant requests assistance in determining the right gearbox for manually rotating a 500 kg engine assembly.
  • Another participant calculates the torque required on the steering wheel based on the engine's center of gravity and suggests a method for determining the necessary gearbox ratio depending on the desired force exerted by the operator.
  • A different participant expresses concern about the need for a one-way gearbox or a similar mechanism to prevent accidents if the operator releases the steering wheel.
  • One participant suggests the use of a rotating engine repair stand as a potential solution for the problem.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the best gearbox solution, and multiple approaches and concerns are presented without resolution.

Contextual Notes

Participants discuss various assumptions, such as the pivoting direction of the engine and the operator's exertion level, which may affect the gearbox selection. The calculations depend on specific dimensions and conditions that are not fully detailed.

Who May Find This Useful

Individuals interested in mechanical engineering, gearbox selection, or manual operation of heavy machinery may find this discussion relevant.

Oje Navarroza
Hi guys badly needed your help, i need to rotate the engine assy. with a mass of 500 kg using a steering wheel so i need to define what is the right gearbox, please be noted that it will be manually rotated by a person see attached drawing for your reference

I'm hoping for your quick response, thank you so much guys
GODbless
 

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    engine stand.jpg
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In which dimension is the engine supposed to pivot? The drawing seems to show it pivoting downward so that it ends up below the shafts. If this is this correct and the engine center of gravity is 320mm from the shaft, then without a gear box the torque on the rim of the steering wheel would be:

(500kg x 320mm) / 750mm = 213kg force on steering wheel rim.

Choose how hard you want the operator to struggle and divide 213kg by that number. That is gives you the gearbox ratio needed. For instance if you want 5kg force on the wheel rim then 213/5 = 43 gearbox ratio. Figure out how you will stop a disaster if he let's go of the steering wheel.
 
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Thanks Tom G. yeah your right that is my another problem i hope there's a one way gearbox or like a concept with chain block/chain hoist.
 

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