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EWA21-2 Series Slewing Drive

Double worm slewing drive is a brand new slewing drive product consisting of the outer casing, worm gear ferrule, worm, motor, and other components. Compared with the single worm rotary drive, the double worm rotary drive still has the characteristics of modularity, safety, and simplified host design. The double worm slewing drive has a more compact structure than the single worm slewing drive. The load capacity is better, and the output torque is far beyond the single worm rotary drive. Double worm rotary drive abandoned in design.

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Double worm slewing drive is a brand new slewing drive product consisting of the outer casing, worm gear ferrule, worm, motor, and other components. Compared with the single worm rotary drive, the double worm rotary drive still has the characteristics of modularity, safety, and simplified host design. The double worm slewing drive has a more compact structure than the single worm slewing drive. The load capacity is better, and the output torque is far beyond the single worm rotary drive. Double worm rotary drive abandoned in design.

The slewing bearing of the core component theoretically constitutes a double-row space cross-roller slewing bearing through the outer casing and the built-in worm gear. At the same time, the bearing capacity theoretically forms a double-row space cross-roller slewing bearing through the outer casing and the built-in worm gear. The two worms mesh with the worm gear to realize the rotation in the slewing body. The housing ensures high load-carrying capacity.

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
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

Advantages of Double Worm Slewing Drive

Double worm slewing drive is a brand new slewing drive product, which consists of an outer casing, worm gear ring, worm, motor, and other components.

Advantages compared to single worm slewing drives:

  • The double worm slewing drive still has the characteristics of modularization, safety, and simplified host design.
  • Unlike the single worm, under the premise of the exact external dimensions, the double worm rotary drive has a more compact structure, better load capacity, and output torque far exceeds that of the single worm rotary drive.
  • The double worm slewing drive abandons the core component slewing bearing in design. It forms a double-row space cross-roller type slewing bearing through the outer casing and the worm gear within it and meshes with the worm gear through two worms in the container. To achieve rotation, to ensure that while earning higher bearing capacity, it can also generate higher output torque.

Double Worm Slewing Drive Application:

1. Heavy duty flat transport truck

Compared with the single worm slewing drive, the double worm slewing drive is more suitable for the steering device of the heavy cargo heavy haul truck with more considerable tonnage. It has been proved that when the single worm slewing drive is used in heavy equipment with large cargo, it will produce jitter and noise. The casing is distorted, and even the worm is broken. Therefore, this particular slewing drive has become a favorite product for the designers of heavy equipment.

2. Heavy lifting and aerial work area.

Adaptability to harsh working conditions and use conditions, especially in heavy lifting and heavy-duty aerial work, the double-row rotary drive is matched with the traditional slewing bearing, which makes the slewing mechanism even more powerful. At the same time, it also provides several times the output torque higher than the conventional design. In the application field, where the load and torque are extremely demanding, the advantage of the single-worm rotary drive is gradually lost, and the double-worm rotary drive meets users' needs.

3. Solar tracking system.

A solar tracking system is an important application field of slewing drive. Solar tracker slew drive as a rotating component can accurately adjust the main engine's rotation angle and elevation angle according to the different sun positions in the day. Comparing the maintenance characteristics of a single worm slewing drive and dual worm axis slewing drive, as well as the increased power generation rate, if the latitude is less than 30 degrees, it is suitable to adopt a single worm slewing drive. If the space is above 35 degrees, it is appropriate to adopt a dual worm axis slewing drive.

Why Choose Our Slewing Drives?

We offer 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!

FAQ

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

Edited

Yjx

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