EWA Series Slewing Drive

ewa 7 series slewing drive

The slewing drive is a particular rotary reduction product derived from the slewing ring product with high integration and large gear ratio, simple structure, easy use, and maintenance because the slewing ring is used as the follower and the frame basis, the inner and outer rings of the slewing ring are used to realize the input and output of the driving power respectively so that the slewing drive can not only achieve 360-degree rotation without a dead point but also can install a driving power source based on the slewing ring frame at the same time. Its transmission efficiency is high.

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The slewing drive is a particular rotary reduction product derived from the slewing ring product with high integration and large gear ratio, simple structure, easy use, and maintenance because the slewing ring is used as the follower and the frame basis, the inner and outer rings of the slewing ring are used to realize the input and output of the driving power respectively so that the slewing drive can not only achieve 360-degree rotation without a dead point but also can install a driving power source based on the slewing ring frame at the same time. Hence, its transmission efficiency is high. It’s a new member of the mechanical transmission device family. Also, because it is essentially a speed reducer, it can be called a rotary reducer, slewing ring reducer, or drive slewing ring.

The other closed state of worm gear can be divided into open and closed two types. The slewing drive can be divided into gear and worm gear shaft drives according to different transmission forms. The most uncomplicated slewing drive is used in excavators, and tower cranes drive slewing rings on construction machinery products. As the last link of the reduction transmission chain, this slew drive is an open type of gear transmission, its front end also needs to be equipped with a planetary reducer with a large gear ratio as its power input, so it can only be called the prototype of slewing drive.

A slewing drive with integrated worm gear worm shaft transmission has been developed to expand the application range of such products and further improve the convenience of product use and maintenance. To further enhance the drive capacity of the product, the enveloping worm shaft transmission is also applied to such products. The slewing drive equipped with an envelope worm increases the driving torque and improves the driving accuracy. It can also be digitally controlled. Therefore, it is widely used in tracking and fine-tuning devices on solar and wind power generation equipment. In addition, it has good application effects in robots, radar, low-speed heavy-duty lifting equipment, lifting equipment, and precision CNC turntables.

(1) EWA 7 Series Slewing Drive

Front View Top View

Performance Parameters

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

(2) EWA 9 Series Slewing Drive

Front View Top View

Performance Parameters

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
8 kN.m 35.6 kN.m 39.8 kN.m 580 KN 220 KN 62:1 <= 0.15 ° 52Kg
5904 Lbf.ft 26300 Lbf.ft 29370 Lbf.ft 130300 Lbf 49400 Lbf

(3) EWA 12 Series Slewing Drive

Front View Top View

Performance Parameters

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
9.5 kN.m 57 kN.m 44.3 kN.m 760 KN 280 KN 79:1 <= 0.15 ° 67Kg
7011 Lbf.ft 41200 Lbf.ft 32700 Lbf.ft 171100 Lbf 62900 Lbf

(4) EWA 14 Series Slewing Drive

Front View Top View

Performance Parameters

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
10.8 kN.m 71.2 kN.m 49.5 kN.m 960 KN 360 KN 86:1 <= 0.13 ° 75Kg
7070 Lbf.ft 52500 Lbf.ft 36500 Lbf.ft 215800 Lbf 80900 Lbf

(5) EWA 14-2 Series Slewing Drive

Front View Top View
   

Performance Parameters

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
16.2 kN.m 71.2 kN.m 74 kN.m 956 KN 363 KN 86:1 <= 0.17 ° 90Kg
11956 Lbf.ft 62600 Lbf.ft 54600 Lbf.ft 216900 Lbf 81600 Lbf

(6) EWA 17 Series Slewing Drive

Front View Top View

Performance Parameters

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
12.96 kN.m 142.4 kN.m 74 kN.m 1166 KN 435 KN 104:1 <= 0.1 ° 97Kg
9564 Lbf.ft 105000 Lbf.ft 54600 Lbf.ft 262000 Lbf 97800 Lbf

(7) EWA 17-2 Series Slewing Drive

Front View Top View

Performance Parameters

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
19.44 kN.m 142.4 kN.m 110 kN.m 1166 KN 435 KN 104:1 <= 0.15 ° 115Kg
14347 Lbf.ft 105000 Lbf.ft 81200 Lbf.ft 262000 Lbf 97800 Lbf

(8) EWA 19 Series Slewing Drive

Front View Top View

Performance Parameters

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

(9) EWA 21 Series Slewing Drive

Front View Top View

Performance Parameters

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
28.7 kN.m 203 kN.m 107 kN.m 1600 KN 650 KN 90:1 <= 0.1 ° 170Kg
21180 Lbf.ft 150000  Lbf.ft 78900 Lbf.ft 35700 Lbf 146000 Lbf

(10) EWA 21-2 Series Slewing Drive

Front View Top View

Performance Parameters

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
48 kN.m 203 kN.m 181 kN.m 1600 KN 650 KN 90:1 <= 0.13 ° 200Kg
35400 Lbf.ft 150000  Lbf.ft 141000 Lbf.ft 359700 Lbf 146000 Lbf

(11) EWA 25 Series Slewing Drive

Front View Top View

Performance Parameters

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
34.2 kN.m 310 kN.m 160 kN.m 2400 KN 950 KN 104:1 <= 0.1 ° 200Kg
25240 Lbf.ft 229000 Lbf.ft 118000 Lbf.ft 539500 Lbf 213600 Lbf

(12) EWA 25-2 Series Slewing Drive

Front View Top View

Performance Parameters

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
58 kN.m 310 kN.m 275 kN.m 2400 KN 950 KN 108:1 <= 0.13 ° 270Kg
42800 Lbf.ft 229000 Lbf.ft 203000 Lbf.ft 539500 Lbf 213600 Lbf

Typical Case of Slewing Drive

Slewing drives can be found in many applications, including:

— Construction Equipment.
— Renewable energy solar trackers and wind turbines.
— Turntable and Welding Positioner.
— Packaging and packaging equipment.
—  assembly line.
—  Air platform.
—  vacuum truck.
—  public transport.
Many of these applications are OEM. OEM slewing drives can be customized to fit these high-volume OEM applications.

Why Choose Our Slewing Drives?

We offer the different dimensions and construction series with straight or helical gearing, an open or closed structure, and screws and casing. We use other materials when manufacturing based on the customer's requirements and operational conditions.

Technical features
Raceway diameter 222 mm up to 640 mm (9 in up to 25 in)
Max. output torque Up to 43,000 Nm (31,585 Ibf-ft)
Weight Up to 250 kg (551 Ibs)
Lubrication Grease
Temperature range -20°C up to +40°C
Design Enclosed housing, ball bearing
Slewing range 360°

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!

Additional information

Edited

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Related products

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

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