China high quality Gear Reducer NEMA17 42mm One Stage Two Stage 3: 1 4: 1 5: 1 7: 1 10: 1 9: 1 12: 1 15: 1 20: 1 25: 1 30: 1 40: 1 50: 1 70: 1 Planetary Gearbox gearbox definition

Product Description


Products Description

Product Paramenters

MODEL PLE42 Reduction ratio Number of stage
Nominal Output Torque N.m 8 3 L1
9 4
9 5
5 7
5 10
10 15 L2
12 16
12 20
10 25
10 28
10 30
10 35
10 40
10 50
10 70
10 100
Sudden Stop Torque N.m 2 times of nominal output torque
Nominal Input Speed rpm 1000
Max Input Speed rpm 2000
Max Radial Load N 300
Max Axial Load N 100
Efficiency % 96 L1
92 L2
Backlash arcmin ≤15 L1
≤20 L2
Noise dB ≤55
Protection Level IP 54
Life Span h 20000
Working Temp. -20°~+150°
Lubrication Method   Permanent Lubrication
Weight kg ≈0.25 PLE42-L1
≈0.35 PLE42-L2
≈0.29 PLE42-L1SW
≈0.38 PLE42-L2SW


Company Profile



Product packaging


1. Do you have online contact info?

2. How can we know the product quality?
A2: We suggest you to order a sample. Also, you can send us email for detail photos for checking if you cannot get enough information in the product page.

3. Is this your final price? May i have the discount?
A3: Our price is the factory price, and if your quantity is larger, we will allow the discount for you.

4.Is there cheap shipping cost to import to our country?
A4: Yes, we have our regular shipping company, they have very good price.

5. Can we visit your factory?
A5: Yes welcome warmly. No. 295, Xihu (West Lake) Dis. Road, Xihu (West Lake) Dis. Town, Xihu (West Lake) Dis., HangZhou City, ZheJiang Province, China.

6.What is the Warranty for your products?
A6: All products product warranty for 1 year, free service for 14 years.


Application: Motor, Electric Cars, Motorcycle, Machinery, Marine, Toy, Agricultural Machinery, Car
Hardness: Hardened Tooth Surface
Installation: Vertical Type
Layout: Planetary Reducer
Gear Shape: Cylindrical Gear
Step: Double-Step


Customized Request

gear gearbox

Are there any disadvantages or limitations to using gear reducer systems?

While gear reducer systems offer numerous advantages, they also come with certain disadvantages and limitations that should be considered during the selection and implementation process:

1. Size and Weight: Gear reducers can be bulky and heavy, especially for applications requiring high gear ratios. This can impact the overall size and weight of the machinery or equipment, which may be a concern in space-constrained environments.

2. Efficiency Loss: Despite their high efficiency, gear reducers can experience energy losses due to friction between gear teeth and other components. This can lead to a reduction in overall system efficiency, particularly in cases where multiple gear stages are used.

3. Cost: The design, manufacturing, and assembly of gear reducers can involve complex processes and precision machining, which can contribute to higher initial costs compared to other power transmission solutions.

4. Maintenance: Gear reducer systems require regular maintenance, including lubrication, inspection, and potential gear replacement over time. Maintenance activities can lead to downtime and associated costs in industrial settings.

5. Noise and Vibration: Gear reducers can generate noise and vibrations, especially at high speeds or when operating under heavy loads. Additional measures may be needed to mitigate noise and vibration issues.

6. Limited Gear Ratios: While gear reducers offer a wide range of gear ratios, there may be limitations in achieving extremely high or low ratios in certain designs.

7. Temperature Sensitivity: Extreme temperatures can affect the performance of gear reducer systems, particularly if inadequate lubrication or cooling is provided.

8. Shock Loads: While gear reducers are designed to handle shock loads to some extent, severe shock loads or abrupt changes in torque can still lead to potential damage or premature wear.

Despite these limitations, gear reducer systems remain widely used and versatile components in various industries, and their disadvantages can often be mitigated through proper design, selection, and maintenance practices.

gear gearbox

Can gear reducers be used for both speed reduction and speed increase?

Yes, gear reducers can be utilized for both speed reduction and speed increase, depending on their design and arrangement. The functionality to either decrease or increase rotational speed is achieved by altering the arrangement of gears within the gearbox.

1. Speed Reduction: In speed reduction applications, a gear reducer is designed with gears of different sizes. The input shaft connects to a larger gear, while the output shaft is connected to a smaller gear. As the input shaft rotates, the larger gear turns the smaller gear, resulting in a decrease in output speed compared to the input speed. This configuration provides higher torque output at a lower speed, making it suitable for applications that require increased force or torque.

2. Speed Increase: For speed increase, the gear arrangement is reversed. The input shaft connects to a smaller gear, while the output shaft is connected to a larger gear. As the input shaft rotates, the smaller gear drives the larger gear, resulting in an increase in output speed compared to the input speed. However, the torque output is lower than that of speed reduction configurations.

By choosing the appropriate gear ratios and arrangement, gear reducers can be customized to meet specific speed and torque requirements for various industrial applications. It’s important to select the right type of gear reducer and configure it correctly to achieve the desired speed reduction or speed increase.

gear gearbox

How do gear reducers contribute to speed reduction and torque increase?

Gear reducers play a crucial role in mechanical systems by achieving speed reduction and torque increase through the principle of gear ratios. Here’s how they work:

Gear reducers consist of multiple gears with different sizes, known as gear pairs. These gears are meshed together, and their teeth interlock to transmit motion and power. The gear ratio is determined by the ratio of the number of teeth on the input gear (driver) to the number of teeth on the output gear (driven).

Speed Reduction: When a larger gear (output gear) is driven by a smaller gear (input gear), the output gear rotates at a slower speed than the input gear. This reduction in speed is proportional to the gear ratio. As a result, gear reducers are used to slow down the rotational speed of the output shaft compared to the input shaft.

Torque Increase: The interlocking teeth of gears create a mechanical advantage that allows gear reducers to increase torque output. When the input gear applies a force (torque) to the teeth, it is transmitted to the output gear with greater force due to the leverage provided by the larger diameter of the output gear. The torque increase is inversely proportional to the gear ratio and is essential for applications requiring high torque at lower speeds.

By selecting appropriate gear ratios and arranging gear pairs, gear reducers can achieve various speed reduction and torque multiplication factors, making them essential components in machinery and equipment where precise control of speed and torque is necessary.

China high quality Gear Reducer NEMA17 42mm One Stage Two Stage 3: 1 4: 1 5: 1 7: 1 10: 1 9: 1 12: 1 15: 1 20: 1 25: 1 30: 1 40: 1 50: 1 70: 1 Planetary Gearbox   gearbox definition		China high quality Gear Reducer NEMA17 42mm One Stage Two Stage 3: 1 4: 1 5: 1 7: 1 10: 1 9: 1 12: 1 15: 1 20: 1 25: 1 30: 1 40: 1 50: 1 70: 1 Planetary Gearbox   gearbox definition
editor by CX 2023-12-04