Zhejiang Sankai Mechanical and Electrical Co., Ltd

Inline Planetary Reducer

Inline Planetary Reducer

Inline Planetary Reducers can offer various speed ratios by changing the number of teeth on the gears or by altering the configuration of the gears. Planetary gearboxes often employ a modular design that can be combined as needed to meet various transmission ratio requirements.
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Zhejiang Sankai Machine and Electric Co.,Ltd

 

 

Zhejiang Sankai Machine and Electric Co.,Ltd is an integrative and professional manufacturer of power transmission device, which specialize in scientific research, production and marketing. As located in Taizhou city, southeast of Zhejiang province, Zhejiang Sankai has a very convenient transport system. And after years' effort, based on dedication and pragmatic management, Sankai has become a famous innovator among transmission industry in the world.

 

Why Choose US

 

 

Our Factory
Zhejiang Sankai Machine and Electric Co.,Ltd is an integrative and professional manufacturer of power transmission device, which specialize in scientific research, production and marketing.

 

Innovation
Adopting advanced detecting equipment and means, company establishes a quality control system that is in accordance with 1S0900 I: 2015. Products are sold all over the country, exporting to Southeast Asia, Europe, America and other regions. Sankai will continue, as we always do, to strive to become a leader of power transmission industry.

 

Our Products
Our company specialize in High Precision Planetary Gearbox, NMRV series Worm Gearbox, UDL series Stepless Speed Variator, SRC series Helical Gearbox, SKM series Helical-Hypoid Gearbox, Precision Gearbox for Robot Arm and PC Helical Gear Unit.

 

Quality services
Sincerely Sankai determine to provide service of better quality, in-time and fast reply to our clients. And Sankai is looking forward to cooperating with domestic and foreign friends and grow together with our hard work and professionalism.

 

Inline Planetary Gearbox

Inline Planetary Gearbox

A Inline Planetary Gearbox is a type of gear system that consists of multiple gears arranged around a central gear, known as the sun gear.

Inline Planetary Gear Reducer

Inline Planetary Gear Reducer

Inline Planetary Gear Reducers are known for their high efficiency, typically ranging from 90% to 98%.

Precision Planetary Gearbox

Precision Planetary Gearbox

Backlash refers to the slight movement or play between the gears in a gearbox. Precision Planetary Gearboxs are designed to minimize backlash for precise motion control.

Precision Planetary Gear Reducer

Precision Planetary Gear Reducer

The lifetime of a Precision Planetary Gear Reducer depends on factors such as operating conditions, maintenance, and quality of components. With proper care, they can have a long service life.

Precision Planetary Reducer

Precision Planetary Reducer

Precision Planetary Reducers offer excellent precision and accuracy in motion control applications due to their compact size and low backlash.

Right Angle Planetary Gearbox

Right Angle Planetary Gearbox

Right Angle Planetary Gearboxes usually require proper alignment during installation to ensure smooth operation and to avoid premature wear.

Right Angle Planetary Reducer

Right Angle Planetary Reducer

Right Angle Planetary Reducers can be coupled with various motor types, including electric motors, hydraulic motors, or even manual crank handles, depending on the application requirements.

Right Angle Planetary Gear Reducer

Right Angle Planetary Gear Reducer

Some advantages of Right Angle Planetary Gear Reducers include compact size, high torque transmission capacity, efficient power transmission, and the ability to handle large speed ratios.

Helical Planetary Gearbox

Helical Planetary Gearbox

Helical Planetary Gearboxes can offer various speed ratios by changing the number of teeth on the gears or by altering the configuration of the gears.

 

What is Inline Planetary Reducer

 

 

Inline Planetary Reducers can offer various speed ratios by changing the number of teeth on the gears or by altering the configuration of the gears. Planetary gearboxes often employ a modular design that can be combined as needed to meet various transmission ratio requirements. In contrast, gear reducers typically consist of two or more sets of parallel-axis gears, reducing speed by having a smaller gear drive a larger one. Gear reducers have a relatively simple structure but may be bulkier, with lower transmission ratios suitable for applications where high precision is not a critical requirement.

 

Advantages of Inline Planetary Reducer

High Efficiency
Planetary gear reducers known for their excellent efficiency. due to their multiple gear sets working together. They minimize power loss and maximize output.

Multiple Gear Stages

Planetary gear reducers utilize multiple gear stages. to distribute the load and power, resulting in reduced friction and power loss. This efficient design ensures maximum energy transfer and utilization.

Load Distribution

The load in a planetary gear system shared among multiple gear teeth. minimizing the stress on individual gears and promoting efficient power transmission. This load distribution reduces frictional losses and enhances overall efficiency.

Gear Mesh Design

Planetary gear reducers often incorporate helical or optimized gear tooth profiles. enhancing gear mesh efficiency and reducing energy losses associated with gear engagement.

Lubrication Efficiency

Planetary gear reducers designed to facilitate effective lubrication of gear teeth and bearings. Proper lubrication reduces friction and heat generation. leading to improved efficiency and extended component life.

Balanced Torque Sharing

Planetary gear systems distribute torque evenly across multiple gears. preventing excessive load on individual components. This balanced torque sharing minimizes power losses and ensures efficient power transmission.

Compact and Lightweight

The compact and lightweight design of planetary gear reducers . reduces inertia and rotational losses. optimizing efficiency and allowing for higher power density in a smaller footprint.

 

The Correct Selection of Planetary Reducer
Planetary Gear Heads
Coaxial Gearbox
Planetary Gear Heads
Coaxial Gearbox

Load Analysis
Begin with a thorough analysis of the load that needs to be driven, including the size of the load and its characteristics (e.g., continuous or intermittent, impact or non-impact). This helps determine the type and specifications of the gear reducer required.

 

Reduction Ratio Selection
The reduction ratio is the ratio of the output speed to the input speed, which directly affects the system's output torque. Choosing the appropriate reduction ratio based on load requirements ensures the system provides sufficient power while avoiding over-engineering and increased costs.

 

Efficiency Consideration
The efficiency of the gear reducer impacts the energy consumption of the entire system. A high-efficiency reducer minimizes energy loss, reduces operating costs, and enhances overall performance.

 

Installation and Maintenance
Consider the installation method and maintenance requirements of the gear reducer. Choosing a reducer that is easy to install and maintain can reduce downtime and increase production efficiency.

 

Environmental Adaptability
The operating environment (e.g., temperature, humidity, dust) of the gear reducer significantly affects its performance and lifespan. Selecting a reducer suitable for specific environmental conditions can prevent failures due to environmental factors.

 

Noise and Vibration
In applications with strict requirements for noise and vibration, such as medical equipment or precision instruments, choosing a low-noise and low-vibration gear reducer is essential.

 

Precision Requirements
For applications requiring precise control, such as robotics or precision machine tools, selecting a high-precision planetary gear reducer ensures the accuracy and repeatability of the system.

 

Key to Installing Precision Planetary Reducer

 

 

When installing precision planetary gearboxes, the following key aspects should be carefully considered:


Integrity Check: Before installation, ensure that both the motor and the gearbox are free from damage and that the connecting parts between the motor and gearbox are dimensionally compatible.


Ensure Co-axial Alignment: The output shaft of the gearbox must be coaxial with the input shaft of the motor to prevent breakage of the motor shaft or wear of the gearbox gears.


Clean Connection Areas: Remove any rust-preventive oil from the motor's input shaft, positioning protrusion, and the gearbox connection area to ensure a tight connection and flexible operation.


Avoid Striking: During installation, it is strictly prohibited to strike the gearbox with hard objects such as hammers to prevent damage to the bearings or gears.


Tighten Bolts Uniformly: When installing, first tighten the bolts on the diagonal to ensure even stress distribution, followed by the remaining bolts.


Lubrication: Add the recommended type and amount of lubricating oil or grease, especially for vertically installed gearboxes, where a suitable lubrication method should be adopted.


Installation Space: Ensure there is sufficient space for installation and future maintenance.


Protection Requirements: Consider protection against dust, water, and other environmental factors to suit different working conditions.


Temperature Range: Select a gearbox suitable for the temperature range of the working environment.


Cost-effectiveness: Choose a gearbox with a high cost-performance ratio based on actual usage requirements.

 

The Application Areas of Planetary Gearboxes
 

Robotics and Automation
In robotics, planetary gearboxes are used to provide precise control and high torque at low speeds, which is essential for accurate and controlled movement of robotic arms and other actuators. They are particularly favored in servo and stepper motor applications due to their precision and efficiency.

 

Machine Tools
The machine tool industry relies on planetary gearboxes for their ability to deliver high power density in a small package. They are used in various machine tools such as milling machines, lathes, and CNC machines to ensure precise and reliable transmission of motion.

 

Medical Equipment
In the medical field, precision is paramount, and planetary gearboxes are used in equipment like diagnostic imaging systems, surgical instruments, and medical beds. Their quiet operation and high torque make them ideal for medical applications where patient safety and comfort are critical.

 

Aerospace
Planetary gearboxes are used in aerospace applications for their ability to withstand harsh environments and provide reliable performance. They can be found in control systems for aircraft, in satellite deployment mechanisms, and in various other aerospace equipment where reliability and precision are essential.

 

Renewable Energy
In the renewable energy sector, planetary gearboxes are a key component in wind turbines and solar tracking systems. They are designed to handle the high torque and variable loads associated with these applications while maintaining efficiency over long periods.

 

Material Handling
Material handling equipment such as conveyor systems, hoists, and cranes benefit from the high torque and compact size of planetary gearboxes. They ensure smooth and efficient operation, even under heavy loads.

 

Automotive Industry
While not directly used in the passenger compartment of vehicles due to space constraints, planetary gearboxes are used in certain automotive applications such as steering systems and auxiliary drives where high torque density is required.

 

How to Deal with the Temperature Change of Planet Gear Reducer

 

The main purpose of planetary reducers is to reduce the speed of equipment used for transmission service. The whole gearbox must have enough lubrication and cooling to operate effectively. If proper lubrication is provided, the gears will run smoothly with each other, otherwise the combination of gears will produce contact and stress at the same time, which may lead to many problems over time. Gear oil is used to lubricate the gear teeth of the coupling. The correct lubricant can be used to prevent the wear and more serious damage of the gear tooth surface.

 

In addition to separating the teeth of the coupling gear, the lubricating oil is also used to cool the surface to avoid high temperature and overheating.


One of the main reasons for proper lubrication of planetary reducers is that the surface of gear teeth can be cooled by doing so. In fact, overheating can quickly become a major problem, especially if the air / oil mixture is still trapped in the planetary reducer network, where carbon deposits form on the surface. This can overload the gear and cause a failure. Many geographical regions have strong temperature fluctuations throughout the year. The temperature fluctuation has a significant effect on the viscosity of the engine oil. Sometimes, companies have to switch to different types of lubricants in the current year, otherwise their equipment may be damaged. In the hot summer, the grease will flow delicately in the lubrication system, and become more dense in the cold and cold winter. Extreme weather conditions make the working conditions of planetary reducers at risk. Heater and oil cooler are usually used to monitor the working temperature of lubricant according to the ambient temperature and working temperature.

 

The temperature fluctuation in planetary reducer will also affect the viscosity of oil. If the operating temperature is irregular, the oil should be filtered or possibly modified to promote better quality operation.

 

Obtaining temperature readings and oil samples can help determine if a thorough reduction of the transmission is required. Sometimes, minor changes can prevent expensive maintenance and downtime.

 

When the planetary reducer operates effectively, it will operate at a higher temperature than other machines. This forces the mineral based oil to decompose and rapidly lose its lubricity at the same time. This type of deterioration can result in the separation of the mixture into different combinations of carbon, hydrogen and oxygen. Carbon can appear as fine particles and quickly enter the oil. If this condition persists, thick sludge will form between the planetary gear teeth and the bearings, which usually leads to metal to metal contact inside the machine. This is a common problem leading to mechanism failure.

 

When choosing lubricants for planetary reducers, it is best to consider which viscosity is the best under normal and extreme conditions. With proper viscosity, the oil can form a film covering the teeth and bearings, protecting them throughout the operation. When the equipment is in the "cold state", the viscosity of the lubricant must be strong enough to enable the system to force oil filling in the whole planetary reducer. If the oil is too thick, the lubrication system will not be able to supply it to the most important areas of the machine.

 

How to Select Lubricating Oil for Planetary Reducer and How to Use It
 
Selection of lubricating oil

According to the different working environment, load size, motion characteristics and friction form of planetary reducer, the proper type of lubricating oil is selected correctly. For example, gear oil with low viscosity and good fluidity should be selected for high-speed gear, lubricating oil with good wear resistance should be selected for low-speed gear, and low pour point gear oil should be selected for low-temperature gear.
Using the wrong lubricating oil will not only lead to planetary reducer gear failure, but also may lead to machine warranty failure. The machine manufacturer usually recommends a specific lubricant for each reducer. These guidelines should be taken seriously, otherwise additional maintenance and hours of downtime are required.

Use of lubricating oil

In order to ensure the normal operation of planetary reducer, the lubricating oil must be used correctly.
a. Ensure that the oiler is clean, strictly avoid impurities and other pollutants into the oil tank, and prevent water leakage, oil leakage and oil mixing.
b. The addition amount of lubricating oil is appropriate, and the refueling operation is carried out step by step in strict accordance with the instructions of relevant instructions. In addition, the lubricating oil of planetary reducer should be changed regularly.
c. Try to make the lubricating oil work under stable and suitable environmental conditions, and the oil temperature is generally ≤ 80 ℃, so as to minimize the impact of environment on the lubricating oil.
According to the working conditions of different purposes and different types of planetary reducers, the reasonable selection of lubricating oil can not only ensure the stable operation of the lubrication system, but also reduce the lubrication cost.

 

The Main Differences Between Planetary Reducers and Servo Motors

Functionality: Planetary reducers are mainly used for speed reduction and increasing torque, while servo motors are used for precise control of mechanical motion.


Control Method: Planetary reducers are usually used in conjunction with motors as speed reduction devices; servo motors integrate control functions and can directly receive control signals.


Accuracy and Response: Servo motors provide high precision in position and speed control with fast response; planetary reducers focus more on torque output and reduction ratios.


Structural Complexity: Servo motors have complex structures, including encoders and control circuits; planetary reducers have relatively simple structures, mainly composed of gears.


Cost: The cost of planetary reducers is usually lower than that of servo motors, especially in applications that do not require high precision control.

Planetary Gear Heads

 

 
FAQ
 
 

Q: What is an inline reducer?

A: Inline gear reducers are used to slow down motor output and increase torque. Also known as inline speed reducer gearboxes, they come in a variety of styles, sizes, and outputs with each brand offering slightly different shapes and benefits.

Q: What is a planetary gear reducer?

A: Planetary gear reducers are compact components that strive to maximize the transmission of torque in various applications. The mechanisms ensure the transmission of high torque levels while simultaneously decreasing the required number of motor revolutions for a set level of power.

Q: What is the purpose of a gear reducer?

A: Gear reducers are a gear or series of gears designed to reduce the torque of a motor, which increases in direct proportion to the reduction of rotations per unit of time or revolutions per minute.

Q: What is inline gearbox?

A: The design of this range of gear units is based on one body piece casting giving increased rigidity. This allows the application of high loads without risks of deformation which might negatively affect technical performances.

Q: What is the difference between a gearbox and a gear reducer?

A: A gearbox-otherwise known as a gear reducer or speed reducer-is a set of gears that can be added to a motor to decrease speed and increase torque drastically. Two standard gearbox configurations are in-line and right angle, though hybrid drives are also available.

Q: Why is it called a planetary gear?

A: The planetary gearbox got its name because of how the different gears move together. In a planetary gearbox we see a sun (solar) gear, satellite (ring) gear and two or more planet gears. Normally, the sun-gear is driven and thus move the planet gears locked in the planet carrier and form the output shaft.

Q: How does planetary gear work?

A: A planetary gear is a type of epicyclic gear system comprised of spur gears. In planetary gearing (also known as epicyclic gearing), a center gear, called a sun gear, serves as the input and driver of the set. Three or more "driven" gears (referred to as planets) rotate around the sun gear within a planetary gearbox.

Q: How does a reducer work?

A: Reducers are functions that take the current state and an action as arguments, and return a new state result. In other words, (state, action) => newState .

Q: What are the different types of gear reducers?

A: Planetary gear reducers, worm gear reducers, gear train gear reducers, plus bevel gear reducers are the four primary kinds of gear reducers.

Q: How do I choose a gear reducer?

A: The first step in selecting a gear reducer is to know the required torque and speed as well as the most suitable type of motor to use. Then, it can be determined if a gear reducer is needed in the particular case. If so, then the next step is to select the proper type and ratio.

Q: What is the difference between inline and right angle gearbox?

A: Right angle gearboxes (worm and planetary) are rugged and built for 90° turns. Inline reducers (parallel shaft and planetary) are an ideal match for motors with high input speeds, or when gearmotor efficiency is important. Contact our technical sales staff for help determining which gearbox solution is best for you.

Q: Why is an inline motor and gearbox used?

A: In-line helical gearboxes and gearmotors, also called helical speed reducers, are commonly employed for a wide variety of industrial applications because of their intrinsic features of strength, reliability and efficiency.

Q: What is an inline helical gearbox?

A: Inline helical gearboxes are compact and efficient power transmission units commonly used in various industrial applications. They offer high torque transmission capabilities with low noise and vibration levels, providing reliable operation in diverse environments.

Q: Does a planetary gearbox increase torque?

A: An early application of planetary gears is still sometimes found today in the form of bicycle hub gears. Thanks to their compact construction, they are effective in increasing torque, despite the relatively small space of the wheel hub.

Q: Can you backdrive a planetary gearbox?

A: Yes, Micron planetary gearheads are fully backdriveable. The backdrive torque is dependant on gearhead size, style, and ratio, and will vary.

Q: What is the benefit of a reducing gear system?

A: In order to achieve high torque, low speeds, and an increased capability to handle inertial loads, manufacturers require significantly large motors, which are difficult and expensive to make. Conversely, gear reducers can achieve all these goals with a much smaller motor, thereby driving down the cost of production.

Q: What are the benefits of a planetary gearbox?

A: Planetary gears are characterised by their high level of efficiency; they also display a high power density in comparison to other types of gears, due to their compact construction. The use of the external ring gear in particular reduces both the volume and mass of this type of gear.

Q: What is the difference between inline and right angle gearbox?

A: Right angle gearboxes (worm and planetary) are rugged and built for 90° turns. Inline reducers (parallel shaft and planetary) are an ideal match for motors with high input speeds, or when gearmotor efficiency is important. Contact our technical sales staff for help determining which gearbox solution is best for you.

Q: Does a gear reducer increase torque?

A: A gearbox-otherwise known as a gear reducer or speed reducer-is a set of gears that can be added to a motor to decrease speed and increase torque drastically.

Q: What are the different types of gear reducers?

A: Planetary gear reducers, worm gear reducers, gear train gear reducers, plus bevel gear reducers are the four primary kinds of gear reducers.

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