China high quality First-Rate Zz/Zj Series Planetary Reducer Gear raw gear

Product Description

First-rate ZZ/ZJ series Planetary reducer gear

Product Description

ZTIC can design and product all series cylindrical gear reducers used in building  materials  industry,  including JGF Centre drive two-stage parallel axis of hard-toothed surface reducer , MGF Centre drive level-3 parallel axis of hard-toothed surface reducer, and MB More meshing edge drive reducer.

1998 – 2000Nm Reducer
1993 – Planetary Reducer – Model ZJ2240 (building materials industry)
1997 – Reducer – Model SZJ3500 (ship lifting)
2000 – Reducer – Model Kf300 (metallurgy)
2005 – Center Driving Reducer – Model JGF-355 (building materials industry)
2005 – Reducer – Model KRC2400 (metallurgy)
2005 – Herringbone Reducer – 850
2006 – Reducer – Model TGF1550 (sugar press)
can design and product various types of ZZ series planet gear reducer, and ZJ series planet gear reducer which professionally for the mills of building industry. The ZZ series, including single-stage,two-stage,triple and single grade derived,the two-stage derived planetary gear reducer .The reducers are widely used in mining, metallurgy, petrol chemical, energy, building, lifting transport, etc.

ZZ/ZJ series Planetary gear reducer
ZJA series planetary gear reducer, its technical characteristics are: bring about using 2 stage gear transmission bring round the sun, the planets wheel adopts advanced nickel chrome steel, after carburizing and quenching heat treatment gear grinding, precision up to GB/T10095 level is above 6; inner gear ring is made of high chrome molybdenum steel after tempering process, the accuracy of GB/T10095 magnitude 7 bring the floating element and drum gear coupling, guarantee the planet wheel is between transmission efficiency of not less than 0.96 bring bring reducer reducer service life not less than 10 years.


Product Parameters

Technical performance table of ZJA planetary Reducer and gear reducer gearbox

No. Power(kw) Reducer type

Rotational speed


Rotation rate Lubrication method Oil number Dimensions(mm) Weight(kg)
1 630 ZJA1250 750 36~44


Concentrated circulation lubrication




Medium load industrial gear oil

2 800 ZJA1400 2135 1880 530 870 11000
3 1000 ZJA1600 2270 2090 570 965 15000
4 1250 ZJA1820 2430 2390 670 1110 22776
5 1600 ZJA2060 600 37~41          

First-Rate Zz/Zj Series Planetary Reducer Gear

Company Profile



Q: Why we believe in HangZhou CHINAMFG industries co., ltd:
A: 1. More than 30 years experience.
     2.We are the leading professional supplier of mining machinery, construction machinery, machines casting and forged parts.
     3. All products achieved ISO9901:2000 quality management certificate and CE, ROHS certificates.
Q:Delivery time:
A: Parts lead time 1-2months, machines 2-3months.
Q:Payment terms:
A: Accept payment type: T/T, L/C, Western union,Cash.
30% deposit when signed contract. Full payment paid before shipping.
Q: Quality warranty?
A: Guarantee time: 1 year for main machinery. If something wrong we will provide the technical advice and find solution immediately. For those wearing parts we guarantee high quality parts for long-term supply.

Q: After sales service?
A: We can supply technical guide for machines running test and parts maintenance if end user needs.

After Sales Service

ZTIC Heavy Industries is your business partner in the After Market.
ZTIC  able to provide:

Hardness: Gear Reducer
Installation: Gear Reducer
Layout: Gear Reducer
Gear Shape: Gear Reducer
Step: Gear Reducer
Type: Gear Reducer


Customized Request

epicylic gear

How does a planetary gear arrangement handle variations in load and stress?

A planetary gear arrangement offers inherent advantages in handling variations in load and stress. Let’s explore how it achieves this:

  • Distributed Load:

One of the key advantages of a planetary gear arrangement is its ability to distribute the load among multiple gears. In this arrangement, the load is shared by the sun gear, planet gears, and ring gear, with each gear sharing a portion of the total load. As a result, the load on each individual gear is reduced compared to a single gear system, reducing stress concentration and enhancing the overall load-carrying capacity.

  • Load Sharing:

Planet gears in a planetary gear system share the load as they are meshed with both the sun gear and the ring gear. This load-sharing characteristic ensures that the load is distributed evenly across multiple gear teeth and contact points. Consequently, the stress on each gear is reduced, minimizing the risk of tooth failure and increasing the system’s durability.

  • Torque Splitting:

In a planetary gear arrangement, torque can be split among multiple paths. By controlling the distribution of torque between the sun gear and ring gear, variations in load can be managed effectively. If one gear path experiences higher stress, the torque distribution can be adjusted to shift the load to other gear paths, thereby balancing the stress and minimizing the risk of gear failure.

  • Multiple Stages:

Planetary gear arrangements can be designed with multiple stages, involving multiple sets of sun gears, planet gears, and ring gears. Each stage can handle a portion of the load, allowing for further load distribution and stress reduction. This multi-stage configuration enhances the gear arrangement’s capacity to handle variations in load and stress, making it suitable for demanding applications.

  • Robust Construction:

Planetary gear systems are known for their robust construction and high torque capacity. They are designed to withstand heavy loads and resist the effects of stress concentration. The use of high-quality materials and precise manufacturing techniques further enhances their ability to handle variations in load and stress.

In summary, a planetary gear arrangement handles variations in load and stress through distributed load sharing, torque splitting, multiple stages, and robust construction. By distributing the load among multiple gears, sharing the load between different paths, and employing multiple gear stages, a planetary gear arrangement can effectively manage variations in load and stress, ensuring reliable and durable operation in a wide range of applications.

epicylic gear

Can planetary gears be used in aerospace and aviation applications?

Planetary gears find extensive use in aerospace and aviation applications due to their unique characteristics and advantages. Let’s explore how planetary gears can be utilized in the aerospace and aviation industry:

  • Aircraft Engines:

Planetary gears play a crucial role in aircraft engines, especially in the reduction gearbox. The reduction gearbox connects the high-speed turbine shaft with the low-speed propeller shaft, allowing efficient power transmission while maintaining optimal propeller speed. Planetary gears within the reduction gearbox help achieve the required gear ratios and torque conversion, ensuring smooth and reliable engine operation.

  • Landing Gear Systems:

Planetary gears are also utilized in landing gear systems of aircraft. These gears provide the necessary torque and force to retract and extend the landing gear during takeoff and landing. Planetary gears offer compactness, high torque capacity, and the ability to handle heavy loads, making them suitable for this critical application.

  • Actuation Systems:

Actuation systems in aerospace and aviation, such as those used for flight control surfaces, also benefit from the use of planetary gears. These gears enable precise and reliable movement of control surfaces, such as ailerons, elevators, and rudders. Planetary gears’ ability to handle high torques, provide accurate positioning, and withstand varying loads makes them well-suited for actuation systems.

  • Satellite and Spacecraft Mechanisms:

In satellite and spacecraft applications, planetary gears are utilized in various mechanisms. They can be found in solar array drives, antenna pointing systems, and deployment mechanisms for scientific instruments. Planetary gears offer compactness, high torque transmission, and the ability to handle the extreme conditions of space environments.

  • Auxiliary Power Units (APUs):

APUs in aircraft are responsible for providing auxiliary power during ground operations and in-flight emergencies. Planetary gears are often employed in APU systems to transfer power from the engine to the auxiliary systems, such as electrical generators or hydraulic pumps. These gears ensure efficient power transmission and reliable operation of the APU.

In summary, planetary gears have significant applications in aerospace and aviation. They are utilized in aircraft engines, landing gear systems, actuation systems, satellite and spacecraft mechanisms, as well as auxiliary power units. The compact size, high torque capacity, precise positioning, and reliable operation of planetary gears make them well-suited for these critical applications in the aerospace and aviation industry.

epicylic gear

Can you explain the unique design and structure of planetary gears?

Planetary gears possess a unique design and structure that sets them apart from other gear systems. Let’s explore the distinctive features of the design and structure of planetary gears:

  • Components:

A planetary gear system consists of three main components: the sun gear, planet gears, and a ring gear. The sun gear is located at the center and is typically driven by an input source such as a motor or engine. The planet gears are gears that surround the sun gear and are connected to a carrier or arm. The ring gear is the outermost gear and meshes with the planet gears.

  • Internal Gear Meshing:

One of the distinguishing features of planetary gears is their internal gear meshing. Unlike other gear systems where the gears mesh externally, the teeth of the sun gear, planet gears, and ring gear are located on the inside surfaces. This arrangement allows for a compact and space-efficient design.

  • Orbiting Motion:

In planetary gears, the planet gears exhibit both rotational and orbital motion. While they rotate on their own axes, they also orbit around the sun gear. This combination of rotational and orbital movement enables the gear system to achieve different gear ratios and torque transmission.

  • Central Sun Gear:

The presence of a central sun gear is another characteristic of planetary gears. The sun gear is positioned at the center of the gear arrangement and serves as the primary driver for the overall gear operation. It receives the input power and transmits it to the planet gears.

  • Versatile Gear Ratios:

Planetary gears are capable of achieving a wide range of gear ratios. The gear ratio is determined by the relative sizes of the gears and the number of teeth on each gear. By varying the number of teeth on the sun gear, planet gears, and ring gear, different gear ratios can be obtained, providing versatility in speed reduction or amplification.

  • Load Distribution:

The arrangement of multiple planet gears in a planetary gear system helps distribute the load among the gears. This load distribution results in efficient torque transmission and enhanced durability. It also contributes to shock absorption and noise reduction during gear operation.

  • Compact Size:

Planetary gears are known for their compact size. The internal gear meshing and the integration of multiple gear sets within a single system contribute to their space-saving design. The compactness of planetary gears is advantageous in applications where size and weight restrictions are critical.

  • Wide Range of Applications:

Due to their unique design and structural characteristics, planetary gears find applications in various industries and mechanical systems. They are commonly used in automotive transmissions, robotics, aerospace systems, industrial machinery, and more. The ability to achieve different gear ratios, transmit torque efficiently, and operate in compact spaces makes planetary gears versatile in transmitting power.

In summary, the unique design and structure of planetary gears include components such as the sun gear, planet gears, and ring gear, internal gear meshing, orbiting motion of the planet gears, a central sun gear, versatile gear ratios, load distribution, compact size, and wide-ranging applications. These features contribute to the efficiency, versatility, and space-saving nature of planetary gears, making them suitable for various mechanical systems.

China high quality First-Rate Zz/Zj Series Planetary Reducer Gear raw gearChina high quality First-Rate Zz/Zj Series Planetary Reducer Gear raw gear
editor by CX 2023-09-23