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EWA7 Series Slewing Drive

Slewing drives are created by manufacturing gearing, bearings, seals, housing, and motor along with other auxiliary elements and assembling them into a finished gearbox. The slewing drive is usually a gearbox that will safely hold radial and axial loads, together with transmitting torque for rotating. The rotation can be within a single axis or in several axes together.


Slewing drives are created by manufacturing gearing, bearings, seals, housing, and motor along with other auxiliary elements and assembling them into a finished gearbox. The slewing drive is usually a gearbox that will safely hold radial and axial loads, together with transmitting torque for rotating. The rotation can be within a single axis or in several axes together.

Slewing drives perform with regular worm technology, by which the worm around the horizontal shaft acts as the driver for the gear. The rotation of the flat screw turns a gear about an axis perpendicular to the screw axis. This blend lowers the pace with the driven member and multiplies its torque, expanding it proportionally as the velocity decreases. The speed ratio of shafts depends upon the relation between the variety of threads on the worm on the array of teeth inside the worm wheel or gear.

As technological innovation has improved, additional slewing drives are working with hourglass worm technological innovation, through which the worm is shaped to engage much more teeth during the gear. This enhanced tooth engagement leads to higher strength, efficiency, and sturdiness.

Due to their various uses, slewing drives can be found in many different model sizes, effectiveness ranges, and mounting characteristics. The drives are well suited for applications requiring each load holding and rotational torque from the same gearbox. They can also be manufactured with dual axes of rotation (turning axes simultaneously) or dual drives around the same axis (two worm threads driving the identical ring gear in one particular axis).

Performance Parameters

Front View Top View


Output torque Tilting moment torque Holding torque Axial load Radial load Ratio Backlash Weight
输出转矩 倾覆力矩 保持力矩 轴向承载力 径向承载力 速比 精度 重量
3.5 kN.m 14.7 kN.m 20.6 kN.m 227 KN 92.7 KN 47:1 <= 0.15 ° 35Kg
2583 Lbf.ft 10800 Lbf.ft 15200 Lbf.ft 51000 Lbf 20800 Lbf

Typical Slewing Drive Applications

There are many applications in which the slewing drive can be utilized, primarily because it is perfect for applications that require both load-holding power and rotational torque strength. Typical slewing drive applications include but are not limited to:

  • Solar Trackers
  • Wind Turbines
  • Man Lifts
  • Hydraulic Machinery
  • Telescopic Handlers
  • Digger Derricks
  • Lifts
  • Cranes
  • Drilling equipment
  • Military Equipment

Company Profile

In line with honest management and customer service, the company is constantly committed to researching and developing new technologies and machines for double-worm slewing drives, small slewing drives, large slewing drives, and slewing bearings. Alternatives. We specialize in creating our brand with many experienced terms and top-notch equipment. The products are exported to Europe, America, Australia, St. Petersburg, Bahamas, Peru, Sydney, and other regions, and the products are sold worldwide. We hope to establish a long-term cooperative relationship with all customers and hope that we can improve our competitiveness and achieve a win-win situation with our customers. We sincerely welcome customers from all over the world to contact us with any need! Welcome domestic and foreign customers to visit our factory.

Due to the practical design, accurate detail processing and dimension, and one-time assembly, the product meets the customer's requirements. The slewing drive is very flexible. No noise, perfect overall accuracy, the center distance cannot be adjusted during the rotary drive assembly, the matching size requirements are relatively strict, and the matching size must be strictly controlled during the design and processing process. Otherwise, problems will arise during the assembly process and be difficult to resolve.

Our slewing drives are available in a large variety of standard design sizes. We will gladly develop a slew drive tailored to your requirements if you are looking for an individual solution.

Contact us – we will be happy to help you!

Production Site


1. Where is your slew drive manufactured?

A: Our slew drives are all manufactured in China. We can design and produce slew drives, and the quality can also be guaranteed. At the same time, our slew drives price is more favorable.

2. I don't know which slew drive to use. Can you choose for me?

A: Yes, we have two product series of worm gear slew drives and spur gear slew drives. Each model has a parameter list on the website. You can choose the suitable slew drive according to these parameter lists. If you don't know how to choose, you can contact our engineers, and we will work with you to select a suitable product. We can also design a new slew drive solution for you according to your equipment.
3. Can I get your product catalog?

A: You can get our product catalog in the download or contact us. We will send the product catalog to you by email or other ways.

4. Can you customize products?

A: Yes, we can. Our engineers have an emotional experience in slew drive design. On the customized slew drives page, you can see some unique customized products designed by our engineers. These design solutions meet the particular needs of many customers. Our engineers can also work with you to design a new slew drive.

5: Can you provide accessories?

A: Yes, we can provide matching spare parts such as motors, hydraulic motors, and encoders compatible with slew drives.

6. Can you provide a 3D model?

A: Yes. All our slew drives have 3D models. You can contact us to get them. At the same time, we can also provide CAD files and PDF files.
7. How long is your slew drives warranty period?
A: Our slew drives warranty time is 12 months. When you install, use and store the slew drives, please refer to the slew drives instruction manual.
8. Can you choose the color of your slew drives housing?

A: Yes. Our slew drives housing is available in many colors. If you have special requirements, please tell our sales engineers, we are happy to provide services for you.

Additional information



Product Quick Detail:

  • Standard and non-standard available
  • With high quality and competitive price
  • Prompt delivery
  • Packing as per customer’s demand.

We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.

Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

pruduct quality report

Materials Available

1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
product materials available

Surface Treatment

Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.

Processing Method

CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
product finishing

QC & Certificate

Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009

Package & Lead Time

Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port
product packages