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EWA19 Series Slewing Drive

Slewing drive is a gearbox that can safely bear radial and axial loads and transmit rotational torque. The rotation can be a single axis or multiple axes. The slew drive is made by manufacturing gears, bearings, seals, housings, motors, and other auxiliary components and assembling them into the final gearbox. Due to its wide range of uses, slew drives have various models, performance ranges, and installation characteristics.


Slewing drive is a gearbox that can safely bear radial and axial loads and transmit rotational torque. The rotation can be a single axis or multiple axes. The slew drive is made by manufacturing gears, bearings, seals, housings, motors, and other auxiliary components and assembling them into the final gearbox. Due to its wide range of uses, slew drives have various models, performance ranges, and installation characteristics.

Features of EWA19 Series Slew Drive

The closed design makes the EWA19 series resistant to wind, rain, and other harsh environments. Here are some ideal solutions to match the relative rotation of two objects' applications: EWA19 series slew drives can be used in indoor and outdoor applications, including but not limited to truck cranes, satellite antennas, solar trackers, wind generators, various utility equipment, and car lifts.

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
18.5 kN.m 196 kN.m 82 kN.m 1810 KN 675 KN 94:1 <= 0.1 ° 120Kg
13640 Lbf.ft 144500 Lbf.ft 60500 Lbf.ft 406000 Lbf 151700 Lbf

Functions of Slewing Drive

Slewing drives work best for applications in which high torque can create precision positioning and rotational accuracy—this design results in a device that works smoothly and powerfully with minimal backlash.

Because of the power and dependability generated by slewing drive technology, the functions of this engineering technology apply to many types of equipment. One particular use, for example, involves solar technology, tracking the sun's movements in perfect time to generate maximum energy output.

Any job requiring high load capacity and reliable positioning may require the implementation of slewing drive engineering.

How to Install Slewing Drive?

(1) Installation and maintenance

①Installation preparation: check whether the slewing drive is physically damaged; Clean slewing drive and connecting bracket; Clean the supporting surface of impurities (such as scrap iron, burr, paint, welding slag, etc. ).

②Please clean the anti-rust oil on the slewing drive mounting surface according to the following instructions: clean the exterior of the slewing drive mounting surface with cleaning liquid (such as diesel, gasoline, etc. ). The cleaning liquid shall not damage the performance of the rubber seals; Please follow the rules for the use of cleaning fluid (e. g., manufacturer's directions, worker protection, environmental protection, etc. ).

③The positioning bolts should not be loose during installation, and the facility can be carried out after the bolts are removed. Assembly bolts are not recommended and provided. The following terms are for reference only. Please correctly select bolt specification, type, and performance grade; Bolt level is not lower than 10. 9, bolt screw hole length is generally two times the nominal diameter of the bolt; Do not screw the bolt out of the hole. Otherwise, it will interfere with and damage the machine. If not, it may affect the rotary reducer bolt connection's performance, service life, and tensile strength. If the contact stress of the allowable mounting surface is exceeded, use an appropriate high-strength washer; Bolts are only for shipping bolts when they leave the factory. Remove them when they are installed.

④Tightening torque recommendation: installation bolts should be fixed by the correct preloading load. Do not use a broken pad, flat pad, etc. Tightening the torque table of mounting bolts is for reference only.

⑤Slewing drive installation: clean the bracket, remove welding slag, galvanized residue, etc.; Bolt the frame to the slewing drive. The bolt head shall be provided with a flat washer and a spring washer. Slewing drive should be installed without load. Please follow the following procedures to avoid internal stress and installation problems during bolt tightening. Add thread fastening glue to the thread; Pre-tightening bolts and washers shall be cross-tightened; See the following figure for tightening order of bolts; Starting from the inside or outside the ring, tighten all bolts to 30% tightening torque, then repeat the diagonal tightening to 50% tightening torque, and finally to 100% tightening torque. All the mounting bolts should be mounted without missing them. In case of structural restriction, the bolt hole must be sealed. If the bolt hole is filled with silicone, it will leak and dust into the slewing drive. The installation bolt should consider the thread meshing length; it should not be too long. Otherwise, it affects the rotation of the slewing support or causes interference; After the bolt is tightened, mark the bolt head and its connection with a line to check whether the bolt is loose later. Refinish during slewing drive installation. Inevitably will cause surface paint bump damage, so the system, after the completion of the final assembly, is necessary to carry out paint repair to the rotary reducer, to improve the ability of rust and corrosion prevention.

Custom Slewing Drives

Our company specializes in producing various kinds of slewing drives, providing high-quality and inexpensive slewing drives, professional technical guidance, and considerate after-sales service. If you need slewing drive, please get in touch with us.


1. What is the production process?

A: Production process including raw material cutting, machine processing, grinding, accessories cleaning, assembly, cleaning, stoving, oil coating, cover pressing, testing, and packaging.

2. How to control the product's quality?

A: Combining advanced equipment and strict management, we provide a high standard and quality slewing drive for our customers worldwide.
3: How long is your delivery time?

A: If there is stock, it is within seven days; if there is no stock, it is 25-45 days, depending on the quantity.

4. Are you a trading company or a manufacturer?

A: We have our factory with 20 years of experience in slewing drive; our type is factory + trade.

5: What are your terms of payment?

A: Stocks goods,100% prepaid. If goods need to produce,30% prepaid and the balance paid before shipment. For big orders over 50000 USD, we can accept L/C At sight.

6. What is your MOQ?

A: For standard type, no MOQ. To produce goods, we need according to slewing drive type.
7. What is transportation?
A: Small quantity, by express, such as DHL, UPS, TNT, FEDEX. If large quantity, by sea or air.
8. Can you provide OEM service?
A: Yes, we provide OEM service, do as your size, packing, and other requirements.

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