Planetery Gearbox (800 to 395,000 N.m)
When it comes to heavy-duty industrial applications, selecting the right gearbox is crucial. SEAWIDE Gearbox offers a range of planetary gearboxes designed to meet the diverse needs of various industries. Whether you’re working in construction, mining, or food processing, understanding the key features, available series, and how to choose the right gearbox is essential. This guide will provide a comprehensive overview of SEAWIDE’s planetary gearboxes, detailing their general features, available series, and tips on selecting the ideal gearbox for your needs.
SEAWIDE planetary gearboxes are known for their high efficiency, durability, and precision. These gearboxes are designed for both general and specialized industrial applications, offering several advantages over traditional gearboxes. Some of the key features include:
SEAWIDE planetary gearboxes offer an impressive efficiency range of 90% to 95%. This high efficiency is achieved through the innovative planetary gear mechanism that minimizes energy loss and ensures smooth operation. The efficiency of these gearboxes makes them ideal for applications requiring consistent performance over long periods.
SEAWIDE gearboxes are made with durable materials that ensure long-lasting performance, even in harsh environments. They are designed to withstand extreme temperatures, high loads, and aggressive working conditions, making them perfect for heavy industrial use.
These gearboxes come with different types of input and output shafts, including single and double shafts, hollow shafts, and flange designs. This versatility allows the gearboxes to be used across a variety of industries, such as construction, food processing, mining, and textiles.
SEAWIDE offers a wide range of gearbox configurations, ensuring that each unit can be tailored to meet specific application needs. Whether you need a standard or custom design, SEAWIDE can accommodate your requirements with its vast array of gearbox options.
SEAWIDE planetary gearboxes are designed to handle high torque capacities. With models capable of bearing up to 400,000 Newton-meters of torque, they can drive even the heaviest machinery. This high torque makes them suitable for both industrial and renewable energy applications.
These gearboxes are equipped with advanced cooling systems that help maintain optimal operating temperatures. In addition, SEAWIDE planetary gearboxes are easy to maintain, reducing downtime and ensuring that machines remain operational for longer periods.
With a 6-month warranty and 5 years of after-sales service, SEAWIDE gearboxes offer reliability and peace of mind. Their design ensures long operational lifespans and reduced failure rates, even under challenging working conditions.
SEAWIDE offers several series of planetary gearboxes, each designed for different industrial needs. Below are the key series of SEAWIDE planetary gearboxes:
The M series planetary gearboxes are compact and highly efficient, designed for tight spaces. They feature a simple yet robust design, making them ideal for use in conveyors, compressors, and small machinery.
Applications: Ideal for conveyors, ventilation systems, small-scale industrial machinery.
Torque Capacity: Up to 25,000 Nm.
Key Features: Easy to install, compact design, suitable for low to medium loads.
The F series gearboxes come with a hollow shaft design, which makes them perfect for applications requiring direct mounting to the motor. This series is known for
its reliability and ease of installation.
Applications: Suitable for textile machinery, packing machines, and conveyors.
Torque Capacity: Up to 50,000 Nm.
Key Features: Hollow shaft for easy installation, robust construction for heavy-duty applications.
The P series is built for heavy-duty applications, equipped with reinforced bearings to handle high radial and axial loads. These gearboxes are ideal for industrial machinery that experiences intense operating conditions.
Applications: Used in cranes, heavy machinery, and pumps.
Torque Capacity: Up to 150,000 Nm.
Key Features: Reinforced bearings, high torque, suitable for heavy-duty applications.
The V series is designed to withstand heavy loads, making it ideal for high-torque applications such as in construction and mining industries. The long bell housing and reinforced bearings ensure these gearboxes provide maximum efficiency under pressure.
Applications: Used in large-scale industrial applications, mills, and mining equipment.
Torque Capacity: Up to 200,000 Nm.
Key Features: High torque, robust design, suitable for high-load applications.
The Z series planetary gearboxes are designed for specialized applications where customization is key. These gearboxes can be tailored to meet the specific needs of industries requiring unique configurations.
Applications: Custom machinery, special-purpose equipment.
Torque Capacity: Up to 100,000 Nm.
Key Features: Customizable configurations, suitable for special applications.
The U series gearboxes are designed with a base-mounted configuration, making them suitable for industrial applications that require a stable and robust foundation. These gearboxes can handle a variety of input and output types, including shaft and flange.
Applications: Industrial machinery, power transmission systems.
Torque Capacity: Up to 200,000 Nm.
Key Features: Base-mounted design, suitable for large industrial setups.
How to Choose the Right Planetary Gearbox: A Selection Guide
Choosing the right planetary gearbox is crucial for ensuring the optimal performance of your machinery. Below are some key factors to consider when selecting a SEAWIDE planetary gearbox:
Different applications require different gearbox configurations. Consider factors such as load capacity, torque requirements, and operating speed when choosing a gearbox.
Ensure that the selected gearbox can handle the required torque for your machinery. SEAWIDE gearboxes come in various torque capacities, with some models capable of handling up to 400,000 Nm of torque.
The size and design of the gearbox should be compatible with the available installation space. For compact spaces, the M series gearboxes are ideal due to their smaller footprint.
Choose a gearbox with the appropriate input and output shaft configuration. Whether you need a hollow shaft, flange, or standard shaft, ensure that the gearbox is compatible with your machinery.
Look for gearboxes that are easy to maintain and offer long operational lifespans. SEAWIDE planetary gearboxes come with a 6-month warranty and 5 years of after-sales service, which ensures that your gearbox remains in good working condition.
If your machinery operates in harsh environments with high temperatures or heavy loads, choose a gearbox with advanced cooling and durability features, like those found in the P and V series.
High-Performance Industrial Transmission
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planetary gear set have high power transmission efficiency, with efficiency of more than 95% in a single stage. It’s this remarkable performance that we see these powerhouses at the heart of the majority of industrial machinery today.
When deciding to employ industrial planetary gear, their specific design is worth noting. Planetary gears’ efficiency owes to their concentric construction, which allows for excellent torque density without compromise to a footprint-saving envelope. In fact, gear ratios are indispensable to machine function, higher ratios compounding torque while reducing speed and lower ratios doing the opposite. In this guide, we’ll cover the different planetary gear sets, how to choose the right ratio for your application, and introduce you to leading manufacturers in the field.
Industrial planetary transmission are a fascinating gear system that differs greatly from conventional gear setups. These compact powerhouses contain multiple gears that are arranged in a manner that is similar to our solar system – the reason they are named “planetary.”
A gearbox planetary is an epicyclic gear train that has three primary elements that work in combination in a unique arrangement. The arrangement includes a central sun gear, multiple planet gears orbiting around it, and an outer ring gear (an annulus). What makes the arrangement unique is how these elements interact – the planet gears interact at the same time with both the central sun gear and with the internal teeth of the ring gear.
The setup is incomplete without the carrier (or planet carrier, arm) that holds the planet gears in position and affixes to the output shaft. This intermeshed setup creates a system where power flows through multiple paths simultaneously, which results in the high efficiency possible over 95% for well-designed systems.
The minimum number of planet gears utilized in the majority of industrial applications is three, but this number can vary. Remarkably, the load-carrying capacity is enhanced as more planet gears are added to the system since the torque is shared to additional gear teeth.
The planetary design offers several advantages that distinguish it from conventional gearboxes. Foremost among these is the compact, space-saving shape with high torque density. In comparison with conventional parallel-axis gearboxes, the planetary design enables the transmission of higher torques within a smaller space.
One other key difference is how planetary gears distribute loads. While traditional gear sets engage through single points of contact, planetary sets spread the loads across several planet gears simultaneously. This load sharing provides smoother operation, reduced wear on individual elements, and improved durability in extreme loads.
Also distinctive is the coaxiality of epicyclic gearbox. The input and output shafts have the same axis, creating an in-line power flow that simplifies machine design and integration. This concentricity also renders them particularly valuable in applications where space is at a premium or where alignment is an issue.
Common nomenclature: sun, planet, ring:
Getting familiar with the special nomenclature helps to visualize how these great gearboxes work , The sun gear is positioned at the center of the system and typically connects to the input shaft. As the center piece, it delivers rotational motion to the surrounding planet gears. The sun gear’s size relative to other components is a significant aspect in determining the overall gear ratio.
The sun gear is positioned at the center of the system and typically connects to the input shaft. As the center piece, it delivers rotational motion to the surrounding planet gears. The sun gear’s size relative to other components is a significant aspect in determining the overall gear ratio.
Planet gears revolve around the sun gear during operation. The intermediate gears mesh with both the ring gear and the sun gear at the same time. They are mounted on a movable carrier and provide the mechanical advantage that planetary gear drive are so good at providing power.
The ring gear (or annulus) offers the outer boundary of the system and includes teeth on its inner surface that mesh with the planet gears. This component is fixed in most arrangements, but there are several modes of operation where various components are fixed or in motion.
The carrier (planet carrier, or arm) connects the planet gears and maintains them at equal distance from the sun gear. It is this component that typically connects to the output shaft in standard designs, delivering the final rotational output at reduced speed and increased torque.
Together, these components create an exceedingly versatile system that can provide 3:1 to 10:1 gear ratios in a single stage, with multi-stage models offering even higher ratios.
Epicyclic gearing, often used interchangeably with the term planetary gearbox, is a highly efficient gear system where multiple planet gears rotate around a central sun gear while meshing with an outer ring gear.
In industrial machinery, epicyclic gearing is valued for its high torque density, ability to achieve gear ratios from 3:1 to over 500:1 in multi-stage designs, and its coaxial input–output configuration that saves space and simplifies alignment.
The internal mechanics of planetary gear reducer are the reason why these systems excel in heavy-duty industrial applications. Within these compact powerhouses, a number of components work together in a choreog raphed ballet of precision engineering.
Sun gear, planet gears, and ring gear interaction
The operation of a planetary gear set begins with the sun gear receiving the input power. As the central gear rotates, it delivers motion to the planet gears that surround it, typically ranging from three to six for balanced distribution. The planet gears subsequently rotate on their individual axes as they orbit the sun gear in a planetary movement. During this process, the planet gears mesh with the sun gear (external mesh) and the ring gear (internal mesh).
The planet carrier maintains proper spacing among planet gears and connects their individual axes. This carrier component can be the output (in most industrial applications) or can be fixed depending upon the specific configuration required. Further, when the carrier is providing output, it collects the motion of all the planet gears to provide the final reduced speed and amplified torque.
In other setups, the ring gear is stationary, creating resistance that causes the planet gears to “walk” along its interior as they turn. Or, in bicycle hub gears and some special applications, the carrier can be stationary while the ring gear provides output.
One of the most significant advantages of planetary gear is their distributed load. As opposed to loading force on a single gear contact point, planetary systems load share across many planet gears simultaneously. Thus, every tooth carries less individual stress compared to conventional gearboxes.
This load-sharing capability creates several practical benefits. It enables Speed Reducers to maintain higher torque ratings for their physical size. It enhances their lifespan significantly under impact forces or substantial loads. Most importantly, by balancing forces around the central axis, planetary transmission can realize efficiency levels of up to approximately 97%.
The unique tooth engagement pattern also contributes to their remarkable performance. With multiple teeth engaging simultaneously during operation, power flows through several parallel paths. This arrangement minimizes energy loss during transmission while maximizing torque density.
The global planetary gearbox market is home to manufacturers that combine advanced engineering with uncompromising quality standards, delivering solutions that meet the most demanding industrial requirements. Selecting the right manufacturer is crucial to ensure long service life, minimal downtime, and precise gear ratio performance across processing lines and automation systems.
Some of the most recognized names in the industry include:
As a dedicated planetary gearbox manufacturer, Seawide Gear delivers high‑torque, high‑efficiency solutions tailored to the needs of modern industries. Our products are designed with:
From heavy‑duty machinery and conveyor systems to renewable energy applications, Seawide Gear stands alongside the most respected global brands by offering robust, application‑specific planetary gearboxes backed by technical expertise and long‑term customer support.
Choosing a trusted planetary gearbox manufacturer is not just about product quality — it’s also about engineering support, customization options, and reliability over years of operation. Partnering with a premium brand like Seawide Gear, or leading European and Japanese manufacturers, ensures stable performance, optimized efficiency, and reduced maintenance costs in industrial environments worldwide.
The gearbox planetary’ coaxial design is another main engineering innovation. In contrast to conventional offset-shaft gearboxes, planetary systems place input and output shafts on the same centerline. The design offers a straight-line power flow that eliminates the need for complex mounting arrangements.
In addition to facilitating installation, the coaxial design offers significant space savings. planetary gears achieve high reduction ratios in very small sizes. This space efficiency makes them ideal for applications where size limitations are severe.
The concentric design also delivers additional mechanical advantages. During operation, the counteracting forces of multiple planet gears balance radially. As a result, shaft bearings experience low radial loading, reducing potential distortion of the outer casing and optimizing bearing life.
Multi-stage epicyclic gearbox push these capabilities even further by mating sequential planetary stages. Each stage’s output becomes the input for the next, allowing designers to achieve extremely high ratios (above 500:1) while maintaining the compact coaxial form factor.
The industry today offers several coaxial gearbox designs optimized for specific applications. Each design constitutes unique trade-offs between torque density, precision, and cost.
Single-stage vs multi-stage
Single-stage planetary gear reducer consist of a single sun gear, typically three planet gears, a carrier, and a ring gear. They offer gear ratios from 3:1 to 10:1 in a compact package. These systems are perfect for applications that require moderate speed reduction in a small area.
Multi-stage planetary gear set connect two or more planetary sets in series. This arrangement provides for much greater reduction ratios—often greater than 100:1. The output of one stage becomes the input for the next, creating a multiplicative effect on the overall ratio. Further, these systems offer progressive reduction, often with greater ratios toward the input end and lesser ratios toward the output.
The primary differences between single and multi-stage configurations are:
Torque capacity (higher with multi-stage)
Physical footprint (larger in multi-stage)
Efficiency (somewhat lower in multi-stage due to additional mechanical interfaces)
Cost (higher in multi-stage due to additional components)
Spur gear planetary systems have straight-cut teeth parallel to the axis of rotation. These gearboxes are the most common and cost-effective configuration for general industrial applications. Spur gear configurations can, for all their simplicity, be afflicted with louder operation and a somewhat lower load capacity compared to others.
planetary transmission with helical gears possess angled teeth (typically 10-30 degrees) as opposed to straight-cut teeth. This leads to a smoother meshing of gear surfaces and, as a result, quieter and increased load capacity. The HPG-R Helical Harmonic Planetary gearhead, for instance, gives more torque compared to the standard series while having low backlash throughout its lifespan.
Custom planetary gears
Custom planetary designs address special application issues beyond standard configurations. Suppliers like Framo Morat develop custom systems such as hub gearbox solutions that reduce overall gearbox length by more than 40% and accept higher radial loads.
Customized versions typically involve changes to gear materials, bearing configurations, lubrication systems, and size. While typically more expensive than standard versions, these customized solutions optimize performance for specialized operational requirements.
High-precision planetary gear drive (or epicyclic gearboxes) are intended for applications requiring very high positioning accuracy. Their main characteristics are very low backlash, high torsional stiffness, and high efficiency.
The Varvel RG Series is a representative example of this kind, offering low-backlash operation with gear ratios from 3:1 to 100:1 and acceleration torque up to 480 Nm. These systems typically have precision-ground gears, high-quality bearings, and special housing designs for maintaining accuracy under changing loads.
Applications of planetary transmission Manufacturer in Industry:
planetary gear reducer are the lifeblood of numerous industrial applications, providing unparalleled versatility in a variety of industries. Their combination of compact design and power transmission sees them everywhere in modern machinery.
In industrial robotics and automation, industrial planetary gearboxes play a crucial role. These gearboxes are designed for heavy-duty applications and, unlike small CNC gearboxes that offer delicate and precise performance, they focus on handling high loads, reliable power transmission, and stable operation under demanding conditions. They are used in industrial robotic arms, automated production lines, and heavy machinery to ensure movements are accurate and operations remain consistent. The industrial design and high efficiency of these gearboxes help minimize energy loss and extend the lifespan of equipment in robotic devices and automation systems.
planetary gear see widespread use in industrial equipment where the control of speed and torque is paramount. They achieve perfection in conveyor systems, mixers, and material handling equipment. They are peerless in these applications because of their ability to withstand heavy loads with high efficiency. In conveyor systems, Speed Reducers assure reliability for elevated speeds and the design compactness is suitable for high-speed product transfer.
Throughout renewable energy applications, planetary transmission play mission-critical functions. In wind turbines, they optimize the rotational speed of generators for efficient electricity generation. Yet, gearboxes remain components most prone to faults in turbines, and maintenance costs often constitute a high portion of operating expenses. In solar applications, tracking systems employ gearbox planetary to provide precise adjustments in panel orientation, optimizing energy harvesting as they follow the sun’s path.
Packaging equipment relies on planetary gear drive for its precise, efficient motion control. The high torque-to-weight ratio delivers fast, accurate movements that are essential for high-speed packing lines. In printing applications, coaxial gearbox offer high-precision, low-noise operation, which ensures precise alignment on paper. These gearboxes can run around the clock 24 hours a day with no deviation in quality.
How to Calculate Gear Ratios in planetary gear reducer:
Gear ratio calculations remain critical to the selection of the right planetary gear set for your application. Mathematical relationships of the gear components determine speed reduction, torque multiplication, and overall performance characteristics.
Understanding gear teeth and ratio formula
The simple formula for calculating planet gear ratios is the number of teeth on each component. Simply put, the ratio depends on what component is fixed and what provides input and output. The general relationship between components is governed by this constraint: the number of teeth on the ring gear is the same as the number of teeth on the sun gear plus two times the number of teeth on the planet gears.
This relationship is provided by: R = 2P + S
Where:
R is ring gear teeth
S is sun gear teeth
P is planet gear teeth
The simple formula to calculate gear ratio is: Gear Ratio = (Number of Teeth on Ring Gear + Number of Teeth on Sun Gear) / Number of Teeth on Sun Gear
For instance, using an 80-tooth ring gear and a 20-tooth sun gear, the ratio is (80 + 20) / 20 = 5, or five turns of the sun gear for each rotation of the ring gear.
Planetary Gear Configurations and Ratios:
Fixed Ring Gear (Planetary Type): The ring gear remains stationary, the sun gear powers the system, and the carrier provides output. The ratio is 1 + (Ring Teeth/Sun Teeth). This arrangement tends to produce ratios from 2 to infinity.
Fixed Sun Gear (Solar Type): Here, when the sun gear is fixed, the ring gear drives the system, and the carrier provides output. The ratio is 1 + (Sun Teeth/Ring Teeth). This configuration will typically yield ratios between 1 and 2.
Fixed Carrier (Star Type): In this, with the carrier fixed, the sun gear typically receives input and the ring gear provides output. The ratio is -Ring Teeth/Sun Teeth. The negative sign indicates reverse rotation between input and output.
For multi-stage planetary transmission, single-stage ratios multiply to provide the overall ratio. This multiplicative effect allows designers to achieve very high reduction ratios. The formula is straightforward:
Overall Ratio = Ratio of Stage 1 × Ratio of Stage 2 ×. × Ratio of Stage n
Two-stage or three-stage configurations are feasible by extension of the ring gear and planetary stages in series. Compounding single-stage ratios of 3:1 to 10:1, a two-stage transmission can
achieve ratios from 9:1 (3×3) to 100:1 (10×10).
Let’s look at a real example: a gearbox planetary with a sun gear (16 teeth), planet gears (16 teeth each), and ring gear (48 teeth). With our formula, if the ring gear is fixed, the planetary ratio is (48+16)/16 = 4.
If we need greater reduction—e.g., 25:1—we can use a two-stage arrangement. This can combine a first stage ratio of 5:1 and a second stage of 5:1 to yield 25:1 overall.
Multi-stage configurations are common in applications requiring high speed control with a requirement for torque density, including robotics, conveyor systems, and automated machinery.
planetary gears are a tribute to mechanical engineering ingenuity. Throughout this guide, we’ve seen their atypical arrangement, high efficiency, and versatility in a variety of applications. The manner in which sun, planet, and ring gears mesh creates a system that delivers high torque in unexpectedly compact packages.
These gearboxes offer technicians and engineers extremely valuable aids for reducing complex mechanical issues. The ability to distribute the loads across a series of contact points significantly enhances durability without compromising efficiency levels in excess of 95%. This renders them particularly valuable where space is minimal and requires maximum power in the most compact size.
Additionally, the many configurations available – from single-stage to multi-stage, spur to helical, and standard to custom
designs – provide options for almost any industrial application. Whether your application demands precise positioning in robotics, reliable power transmission in wind turbines, or quiet performance in packaging equipment, there is likely a planetary solution.
Gear ratio relationships in mathematics might seem to be complex at first but are logically derived from tooth numbers and component configurations. The formulas, once mastered, are excellent tools for selecting the right gearbox for specific applications.
No doubt, epicyclic gearbox will continue to play their critical roles in manufacturing, renewable energy, transportation, and hundreds of other industries. Their inherent advantages – compactness, high efficiency, great durability, and excellent versatility – ensure that they remain at the heart of modern machinery for decades to come.
Prior to choosing a planetary gear drive for your application, weigh all the considerations carefully – ratio required, torque capacity, space limitations, and environmental conditions. The correct choice will render reliable service with maximum performance and minimum maintenance needs.
FAQs:
Q1. How do you calculate the ratio of a planetary gear? The overall formula to calculate a Speed Reducers ratio is: (Number of Ring Gear Teeth + Number of Sun Gear Teeth) / Number of Sun Gear Teeth. For example, if the ring gear has 80 teeth and the sun gear has 20 teeth, the ratio would be (80 + 20) / 20 = 5:1.
Q2. On what basis should the choice of a gearbox ratio be made? The choice of a gearbox ratio is based on the requirement of output speed, torque requirement, availability of space, and efficiency needs. Also, take into account the specific application, such as robotics, conveyors, or automotive, as they may have unique requirements.
Q3. What is the range of ratios for planetary transmission? Single-stage gearbox planetary typically offer ratios ranging from 3:1 to 10:1. Multi-stage configurations can offer much higher ratios, generally in excess of 100:1. The exact range is based on the specific design and number of stages used.
Q4. How do planetary gears differ from other gearboxes? epicyclic gearbox differ from other gearboxes in being highly compact, having high efficiency (above 95% in single stage), and load distribution across multiple gears. They also feature coaxial input and output shafts, making them ideal to be used in space-constrained applications.
Q5. Which industries commonly utilize planetary gear drive? coaxial gearbox have widespread usage in robotics, wind power, automotive transmissions, conveyor systems, aerospace, and packaging machinery. Their compact size, versatility, and high torque capability make them well suited to be utilized in a broad range of industrial applications.
