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Rajastc
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I want to calculate torque to rotate 1200 kg of mass which is attached in 1.5" dia shaft. Shaft is supported by 2 bearings at its end. Neglect bearing frication. Please help.
That's what I said earlier: if friction is negligile, even very small torque values will be sufficient.Rajastc said:if the mechanism is symmetrical, respective load, torque will be negligible. And consider no bearing friction. Right?
But the formula for torque is
T= mass x g x Radius x coefficient of frication.
The formula for torque:tygerdawg said:Finally, turning the object from rest requires PeakTorque = (TorqueToAccelerate) + (TorqueForFriction) + (TorqueToKeepTurning) + (TorqueForAnythingElse) + etc.
To initiate rotation we will need to consider co-efficient of static friction and "torque required to keep it turning" will require to consider co-efficient of kinetic friction. soRajastc said:Thanks tygerdawg , mfb & Jobrag..I got fair idea to proceed further.The formula for torque:
1. Torque to accelerate= MMI x Acceleration.
2. Torque for frication= T=μ*m*g*R
where :
T : the required torque
μ : the friction coefficient
m : the weight of the cylinder
g : Earth gravity
R : radius at contact bearings/cylinder
Can you confirm the above torque for frication formula?
3. Torque to keep turning :
In my case , no need continuous rotation. but for understanding, can you give some more information?
Torque is a measure of the force that causes an object to rotate. It is directly proportional to the magnitude of the force applied and the distance between the force and the axis of rotation.
The required torque to rotate an object can be calculated by multiplying the force applied to the object by the distance from the axis of rotation to the point where the force is applied. This is known as the moment arm or lever arm.
The formula for torque is T = F x d, where T is torque, F is the force applied, and d is the distance from the axis of rotation to the point of force application.
To determine the required torque to rotate a 1200 kg object, we need to know the force being applied and the distance from the axis of rotation to the point of force application. Once we have these values, we can use the formula T = F x d to calculate the required torque.
Yes, there are other factors that can affect the required torque for rotation, such as the shape and size of the object, the distribution of mass within the object, and any external forces acting on the object. These factors may need to be taken into account when calculating the required torque for a specific object.