What is a planetary gearbox?
A planetary gearbox is a remarkable mechanical configuration where both the input shaft and output shaft are perfectly aligned. This innovative design ensures the transmission of maximum torque in the most space-efficient manner, a concept known as torque density, making it indispensable for a variety of high-performance applications.
Consider the bicycle's acceleration hub: a perfect illustration of the planet-wheel mechanism. Have you ever marveled at how such a compact hub delivers immense power and functionality? In a three-speed hub, a single-stage planetary gear system is employed, while a five-speed hub utilizes a two-stage system. Each planetary gear setup features a reduction state, a direct coupling, and an acceleration mode, optimizing performance.
Mathematically, the smallest achievable reduction ratio is 3:1, with the largest reaching 10:1. Ratios below 3 lead to an oversized sun gear in comparison to the planet gears, while ratios above 10 result in an undersized sun wheel, causing a drop in torque. Typically, these ratios are absolute, represented by integer values for precision.
The inventor of the planetary gearbox remains unknown, yet it was functionally described by the visionary Leonardo da Vinci in 1490. This ingenious mechanism has stood the test of time, being a staple in mechanical engineering for centuries.
Model |
2105 |
2205 |
2207 |
2209 |
2210 |
2211 |
2255D |
311R |
Power |
18.5 |
30 |
18.5/22 |
30 |
37 |
55 |
55 |
55 |
(KW) |
Input Speed |
615 |
818 |
635/635 |
635 |
756 |
756 |
652 |
652 |
(rpm) |
Speed Ratio |
21.95 |
29.2 |
23.54/23.54 |
23.54 |
27 |
27 |
23.3 |
27 |
Output Torque |
6310 |
10232 |
6550/7780 |
10600 |
12620 |
18760 |
18760 |
18760 |
(N.M) |
Max. Torque |
11400 |
18500 |
11000/13000 |
18000 |
22700 |
33800 |
33800 |
40000 |
(N.M) |
Weight |
141 |
180 |
138 |
132 |
205 |
220 |
303 |
352 |
(KG) |
Application |
1~1.25mm |
1.5mm |
1mm |
1.5mm |
2~2.5mm |
3mm |
3~3.5mm |
3~4.5mm |
- Our housing design supports parallel shaft modes and horizontal mounting, paired with a versatile component array that enhances reducer configurations, offering unprecedented adaptability to meet your mechanical demands.
- Designed with an acoustically optimized structure, extensive surface area, and a substantial fan, our gearbox excels in controlling temperature and minimizing noise. The precision grinding of both cylindrical and bevel gears guarantees stable, efficient power transmission.
- Input Mode Options: Tailor your operational requirements with either a motor-connected flange or shaft input, ensuring seamless integration and performance.
- Output Mode Selections: Choose from a variety of output configurations including solid shaft with flat key, hollow shaft with flat key, hollow shaft with shrink disk, hollow or solid shaft with involute splines, or solid shaft with flange, each designed to meet specific operational needs.
Mounting Mode: With options such as foot-mounted, flange-mounted, swing base-mounted, and torque-arm-mounted styles, our gearboxes ensure versatility and adaptability for any application.
- Our planetary gearbox series boasts incredible flexibility with sizes ranging from 3 to 26, stages from 1 to 4, and ratios from 1.25 to a staggering 450. By combining with the WR, S, and K series, the ratio can be dramatically increased, delivering an unmatched performance.


Maanshan Huafei Machinery Trading Co., Ltd: A pioneering force in the machinery trading industry, known for our steadfast commitment to superior quality and unparalleled service, setting new standards of excellence. As an industry leader, we excel in Concrete Mixer Wear Parts and Twin Shaft Concrete Mixer Wear Parts, offering a wide array of products such as Central Mixing Shovels, ARM Assemblies, and more. We seamlessly integrate cutting-edge technology with deep industry expertise to deliver exceptional solutions.
Explore our precision-engineered offerings like Liners, Wear Plates, Mixing Arms, Blades, Paddles, Scrapers, Tiles, and Side & Floor Linings. Each product is meticulously crafted to ensure optimal performance and long-lasting durability, meeting the highest standards.
We offer superior replacement parts for mixers from leading brands like SICOMA, B.H.S, KYC, ZOOMLION, LILIAN, MARINI, AMMAN, TEKA, PARKER, STETTER, SIMEM, ORU, O-COUGHI, EUROTECH, ELBA, MEACONS, POLYTECH, MAXOMIX, AQUARIUS, WIGGERT, and many more, guaranteeing exceptional quality and reliability.
Packaging |
Size |
800(L) * 800(W) * 800 (H) |
Packed Wear Parts to Delivery |
Transport of Large Trucks to The Seaport |
Packaging Details |
The normal package is wooden box(Size: L*W*H). If container is too tight,we will use PE film for packing or pack it according to customers special request. |
1. How can I place an order?
A: Placing an order with us is incredibly straightforward. Simply email us your details or use our user-friendly online ordering system to enjoy a seamless and hassle-free purchasing experience.
2. How do I pay?
A: After confirming our Proforma Invoice (PI), we will guide you through the payment process. We accept T/T and LC methods for your convenience and flexibility, ensuring a smooth transaction.
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A: Indeed, we are a professional manufacturer of machines and spare parts, wholeheartedly devoted to delivering exceptional quality and unparalleled reliability. Our unyielding dedication to excellence ensures that each product not only meets but exceeds industry standards, providing you with peace of mind and satisfaction.
4. Do you accept special orders?
A: Absolutely! We enthusiastically embrace the opportunity to accommodate special orders. Our state-of-the-art design and manufacturing facilities are fully equipped and ready to manifest your unique visions into reality, ensuring your specific needs are met with precision, creativity, and meticulous attention to detail. Let us transform your ideas into tangible success.
5. Do you have any product inspection procedures?
A: Absolutely! At Maanshan Huafei Machinery Trading Co., Ltd, we uphold an unwavering commitment to quality excellence through our exceptional quality assurance processes. Every product undergoes a rigorous and comprehensive 100% self-inspection before it reaches packaging. This meticulous attention to detail guarantees that we consistently uphold the zenith of quality and craftsmanship, ensuring you receive only the finest products.
6. Can you provide details on the pricing? Is there any possibility for a discount?
A: At Maanshan Huafei Machinery Trading Co., Ltd, we are passionately committed to offering unparalleled value to our cherished clients. Our pricing strategy is meticulously designed to be flexible and responsive to diverse market conditions. We strive to deliver incredibly competitive and appealing pricing, with the exciting possibility for negotiation, ensuring we tailor the best possible solutions for your unique requirements and desires, creating a win-win scenario for all.