How are gearboxes rated?

Commercial gearboxes are rated with a L10 bearing life of 5,000 hours, or seven months. Industrial gearboxes are rated with a L1 0 life of 100,000 hours or 11 years. Even when the commercial gearbox service factors are applied for “continuous duty,” the life will not approach that of the industrial rated gearbox.

How do you calculate gear on a motor?

Gear Reducer Torque = 9550 * Motor power / Rated Power motor’s input revolution*Ratio* gear reducer efficiency. The above calculation is the torque equation. Motor power = torque ÷ 9550 × Rated power’s motor input speed /Ratio /service factor.

How is gearbox power calculated?

Motor power = torque ÷ 9550 × Rated power’s motor input speed /Ratio /service factor. [1] Service factor(f.s.):…How to calculate gearbox output torque?( gearbox output torque calculation formula)

Code Description Unit
T2 Gearbox output torque N.m (Kgs.m)
P1 Input Power Kw
n1 Input speed r/min (RPM)
i Total ratio

How do you calculate the rpm of a gearbox?

For a 60 Hz system with four poles, the calculations to determine RPM would be:

  1. (Hz x 60 x 2) / number of poles = no-load RPM.
  2. (60 x 60 x 2) / 4.
  3. 7,200 / 4 = 1,800 RPM.

How is gearbox service factor calculated?

It’s the ratio of horsepower your gear reducer can mechanically handle compared to the horsepower required for your application. Put simply, it is how overdesigned the gearbox is when it comes to handling the application load.

What is the gearbox factor?

The gearbox service factor is the ratio between the horsepower that a gearbox is rated to handle and the horsepower required for the application. In practical terms, it defines a performance safety margin that may be required by incredibly demanding tasks to help ensure long-lasting and trouble-free operation.

How do you design a gear box?

The first step in the gearbox design process is to select the material. A material is to be selected by doing intensive research on the properties of the various materials. A material is to be selected keeping in mind the various parameters like strength, weight, durability, cost and other parameters.

How do I know gearbox gear ratio?

What is gear ratio and how to calculate gear ratio

  1. gear ratio = (diameter of input gear)/(diameter of output gear)
  2. gear ratio = (radius of input gear)/(radius of output gear)

How do you calculate gearbox ratios?

To calculate the gear ratio: Divide the number of driven gear teeth by the number of drive gear teeth. In our example, it’s 28/21 or 4 : 3. This gear ratio shows that the smaller driver gear must turn 1,3 times to get the larger driven gear to make one complete turn.

How do you calculate gearbox efficiency?

Gearbox efficiency is the ratio of the output torque divided by the product of the input torque times the overall gear ratio. The overall gear ratio is the total gear reduction in the gearbox—the number of motor revolutions required for one revolution of the stem nut.

What is rated torque of gearbox?

For example if the design torque is 300 Nm, the rated nominal torque is 100 Nm. The motor shaft is clamped in the hollow input shaft of the gearbox. This torque shows when the motor shaft will start to slip inside the gearbox.