Quick Details

Place of Origin:

Zhejiang, China

Brand Name:


Model Number:




Output Torque:


Tilting Moment Torque:


Holding Torque:


Static Axial Rating:


Static Radial Rating:


Dynamic Axial Rating:


Dynamic Radial Rating:


Gear Ratio:


Weight (Kg):




Supply Ability

Supply Ability:
3000 Piece/Pieces per Month Can be partial delivery

Packaging & Delivery

Packaging Details
Be oiled & wrapped in the transparent vacuum plastic bags & wrapped with blue water-proof belt & carton box &wooden box.”>Please see below the packing pictures:

Be oiled & wrapped in the transparent vacuum plastic bags & wrapped with blue water-proof belt & carton box &wooden box.
Lead Time
1-25 days(Depending on the product availability)

Online Customization

21" slewing drive double worm

LDB‘s slewing driveis composed of the housing, slewing bearing, sealing, enveloping worm with some completed spare parts. We can also produce the Electronic motor and Hydraulic motor used for slewing drives, which can moves forclockwise direction and counter clockwise direction rotation.

1. Slewing drive SE21-2 parameters data

2. SE21-2 slewing drive application area

Our SE21-2 slewing drive can be widely used in PV, CPV, STP, CSP solar tracking systems and construction applications, such as truck cranes, manlifts, turntables, port machinery, modular vehicles, small wind power systems and satellite communications, heavy load transporters, bridge inspection equipment, telescopic working platform, basket rotator requirements, yacht crane, cement mixer, excavator, etc. We can also provide multiple size of slewing drive and slewing berarings,hydraulic motor &DC Motor to match with slewing drives. Products have been exported to all over the world.

3. Model Selection

The following data sheet for you choose the model accordingly.

4. Our packing & Transport

All slew drives will be packed with fumigration-free wooden case.

Support sea transportation , air transportation, road transportation, Express such as TNT, DHL,UPS,EMS, Fedex,etc for sample and small cargo transportation.

5.installation instructions

Horizontal installation & Vertical installation, see below picture.

Tow single sleiwng drives can achieve dual axis slewing drive systems.

One dual axis slewing drive can achieve dual axis slewing drive systems.

One slewing drive with one linear actuator can also achieve dual axis slewing drives.

6. Company information.

LDB established in 1999, and with more than 16 years experience inproducing and designing slewing drive for Solar Projects, products have been exported to 70 countries, such as Australia, USA, Canada, Germany, Spain, UK, Holland, etc.We can also customize solution for PV / CSP solar power plants according to customer requirements.

7. Our slewing drive tests :

The specific tests will be made before tha package, All of our products have been 100% inspected strictly before delivery, each product needs to be Motor Torque Tested, Dimension Tested, Salt Spray Tested and Tilting Moment Tested.

8. Our quality control ISO 9001:2000

Our company inspecter will check the products one by one before we sent it out, and we can also follow customers’ special requests to control the quality. We have got little feedback of quality issue from customers these years. So please rest assure.

9. 2016 Shanghai Bearing Expo – Small Solar tracker system (dual axis solar tracker system)

In 2016,we went to Shanghai to attend the 2016 Bearing Expo, we shown amodel of solar tracker at the fair, the pictures show asolar tracker system, with aSE7 and linear actuator. Our SE7 adjust the solar panel in horizontal direction, and linear actuator adjust the angle of the panel.

For more details, pls contact us as below, we have technical catalog for you reference.