What are the advantages and disadvantages of metal gears and plastic gears

What are the advantages and disadvantages of metal gears and plastic gearsMany people may not be very clear. The EP below will tell you about it, hoping to help you in product selection.

XNUMX. The advantages and disadvantages of metal gears:

advantage:

1. Metal gears have high precision and strength, and can be used in occasions with high precision, high speed and large load capacity.

2. A wide range of transmission ratio can be used for deceleration or speed increase.

3. It can ensure the instantaneous transmission ratio is constant, the stability is high, and the transmission movement is accurate and reliable.

4. It has a high coaxiality, and the diameter accuracy is also easy to guarantee. There is no need to consider shrinkage compensation in manufacturing.

5. Rugged and durable, high transmission efficiency, low noise, relatively simple application environment requirements, and easy maintenance.

6. The transmitted power and speed range is large, the structure is compact, the work is reliable, and a large transmission ratio can be achieved.

Things to note:

1,Precision gearThe manufacturing and installation requirements are relatively high, and the cost is relatively high.

2. Vibration, shock and noise during operation and generate dynamic load.

3. Lubrication is required and regular maintenance is required.

4. No overload protection.

5. When the accuracy is low, the vibration and noise are large.

6. It is not suitable for long-distance transmission between two shafts.

XNUMX. The advantages and disadvantages of plastic gears:

advantage:

1. It has the advantages of self-lubricating (no lubrication required), light weight, and low noise that metal gears lack.

2. As long as it can be drawn with CAD, it can usually be molded.

3. Complicated shapes can be formed.

4. The tooth profile is more accurate than metal gears.

5. Convenient manufacturing, low cost in large quantities, wear resistance and corrosion resistance.

Things to note:

1. Compared with metal gears, the strength and accuracy are worse, and the service life is shorter.

2. The working environment has high requirements, and there are high control requirements for the use environment such as temperature.

3. The diameter tolerance is larger than that of metal gears.

4. Need to be rightgearAll parts are tested.

5. Measure and adjust the abnormal shrinkage and molding abnormality of the molded plastic gear.

6. Molded, coaxiality is difficult to guarantee.

7. Generally used in occasions such as instruments, printers, cars, toys, etc. where the force is not large or the transmission accuracy is not high, and the cost must be controlled.

Molded plastic gears are processed by molds, and almost all metal gears are processed by cutting and grinding.One of their fundamental differences lies in their manufacturing methods.

The above description of the advantages and disadvantages of metal gears and plastic gears is for reference, and welcome to add if there are any deficiencies.