Premium slew drive & slewing reducer manufacturer
Introduct to our single/dual-worm and heavy-duty WE/WEA & SE series (sizes 3-25). Engineered to withstand axial, radial, and tilting moments. Customizing connecting parts for your hydraulic/electric motors.
（一） What is a Slew Drive Unit? (Slewing Reducer Introduction)
A slewing drive is a new type of slewing product—also known as a slewing reducer—typically composed of components such as a worm, a slewing bearing, a housing, a motor adapter, an end cap, and a top plate.
Key features:As the core component utilizes a slewing bearing, it can simultaneously withstand axial forces, radial forces, and overturning moments.
Advantages over traditional products:Easy to install and maintain, and offers significant savings in installation space.
application:Slew drives are widely used in a variety of equipment requiring rotary motion, such as construction machinery, solar tracking systems (including photovoltaic and concentrated solar power systems), cranes, and turntables.
Diagram of slewing drive products (click image to enlarge)
Classification & Types of XZBeirun Slewing Drives
Based on differences in transmission method, structure, and load-bearing capacity, slewing drives can be broadly categorized into the following four types:
1. Single-worm slewing drive
S Series
Model：7、9、12、14、17、21、25
SE Series
Model：3、5、7、9、12、14、17、21、25
PE Series
Model：3、5、7、9、12、14、17、21、25
ZE Series
Model：3、5、7、9、12、14
2. Dual-worm slewing drive
It features a dual-worm design, ensuring smoother transmission and higher load-bearing capacity.
S-2 Series
Model：14、17、21、25
SE-2 Series
Model：14、17、21、25
3.Special-type slewing drive
Models designed for specific application scenarios.
SDE3
Specially designed model.
VE Series
Model：3、6、7、9。
PVE Series
Model：3、6、7、9。
4. Heavy-duty Slewing Drive (WE/WEA Series)
Specifically designed for heavy-duty, high-load applications, offering exceptional load-bearing capacity.
Model：7、9、12、14、17、21、25
（三）Core Components of a Slewing Drive Unit
The slewing drive unit is primarily composed of the following core components:
- Worm: Core transmission component that converts input power into rotary motion.
- Slewing bearing: Core load-bearing component capable of simultaneously withstanding axial forces, radial forces, and tilting moments.
- Housing: Main structural component providing support and protection.
- Motor mounting block: Used to connect the drive motor (electric, hydraulic, etc.).
- End cap: Sealing and protective component.
- Top plate: Typically serves as the mounting panel.
- Base: Mounting foundation.
- Adjustment block: Used to adjust clearance and ensure transmission precision.
Figure: Schematic diagram of the slewing drive structure (click to enlarge)
（四） Industrial Applications of Slew Drives
1. Truck-mounted crane / Marine crane / Crane
Key parameters to consider during model selection:
- Boom length and dead weight
- Maximum lifting capacity
- Or directly provide the maximum overturning moment generated by the equipment
2. Rotary Table / Rotary Worktable / Automated Assembly Line
Key parameters to consider during selection:
- Turntable dimensions
- Rotational speed requirements
- Axial load and overturning moment (eccentric loading conditions)
- Positioning accuracy requirements
- Operating ambient temperature
3. Solar tracking system
Widely used in various solar tracking systems, including: dual-axis tracking, single-axis tracking (horizontal and tilted), parabolic trough tracking, and dish tracking.
Key parameters to consider during selection:
- Total area of solar panels
- Maximum slewing torque and overturning moment
- Power configuration (DC 24V/12V or AC 380V gear motor)
Figure: Applications of slewing drives across various sectors (click image to enlarge)
4. Clamping equipment such as log grapples
Key parameters to consider during selection:
- Weight of the load to be gripped
- Weight of the gripper itself
- Required rotation speed
- Required rotational torque
- Whether the equipment operates on an incline
（五）Selection Table
The following is a detailed selection parameter table for the SE series slewing drive, including overall dimensions, mounting dimensions, and mounting hole specifications.
| Model | External Dimensions | Installation Dimensions | Mounting Hole Data | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L1 | L2 | L3 | H1 | H2 | D0 | D1 | D2 | D3 | D4 | D5 | D6 | n1 | M1 | T1 | T2 | n2 | M2 | T3 | T4 | |
| mm | Inner Ring | Outer Ring | ||||||||||||||||||
| SE3 | 190 | 160 | 80 | 94.5 | 97.5 | 152 | 126 | 100 | no | no | 100 | 115 | 6 | M10 | 17 | 32 | 6 | M10 | 22 | no |
| SE5 | 219.2 | 168 | 93.8 | 72 | 79 | 183 | 120 | 70 | 50 | 103.5 | 135 | 161 | 7 | M10 | 20 | 41 | 6 | M10 | 20 | 39 |
| SE7 | 295.7 | 186 | 132.7 | 76.5 | 81.8 | 258 | 145 | 120.6 | 98 | 163 | 203.2 | 237.5 | 10 | M12 | 25 | 45 | 8 | M12 | 25 | 43.4 |
| SE9 | 411.6 | 321.7 | 174.2 | 104.5 | 107.9 | 345 | 204 | 175 | 146 | 222.5 | 270 | 316 | 15 | M16 | 30 | 65.9 | 16 | M16 | 30 | 52 |
| SE12 | 499.5 | 339.5 | 220 | 105.9 | 110.4 | 431 | 289 | 259 | 229 | 308.5 | 358 | 406.1 | 19 | M16 | 30 | 69.4 | 18 | M16 | 30 | 51 |
| SE14 | 529.4 | 337.5 | 237.6 | 106.5 | 111 | 456.5 | 325 | 295 | 265 | 342.5 | 390 | 435.1 | 23 | M16 | 30 | 69 | 18 | M16 | 30 | 52 |
| SE17 | 615.4 | 385.2 | 275.3 | 121.5 | 126 | 550.5 | 406 | 365.1 | 324 | 425 | 479.4 | 522 | 20 | M16 | 32 | 79 | 20 | M16 | 32 | 55 |
| SE21 | 751.4 | 470 | 345 | 137 | 140 | 667.7 | 533 | 466.7 | 435 | 525.5 | 584.2 | 621 | 35 | M20 | 40 | 85 | 36 | M20 | 40 | no |
| SE25 | 863 | 469 | 401.8 | 126.2 | 130 | 792 | 628 | 565 | 512 | 620 | 675 | 744 | 35 | M20 | 40 | 87 | 36 | M20 | 40 | no |
（六）Powertrain Options
The slewing drive offers flexible configuration options for various drive methods to suit your specific application requirements:
Manually driven
Manual operation via a hand crank; suitable for applications requiring no external power or as a backup drive.
Geared motor
Motors with various power ratings, speeds, and voltages (such as AC 380V or DC 24V/12V) can be configured to enable automated electric control.
Hydraulic motor
Delivers powerful performance; suitable for applications with existing hydraulic systems, such as construction machinery and heavy equipment.
Customization of connecting parts
We can customize the connecting flange, keyway, and other features to match the interface of your electric motor or hydraulic motor.
Model Selection Service:We provide detailed selection charts and model coding specifications for slewing drives to help you quickly and accurately select the right model.
（七）Contact Us
For more product information, technical specifications, or customization requirements, please feel free to contact us:
Professional Provider of Slewing Drive Solutions
Areas of Expertise: Design, manufacturing, and customization of slewing drives and slewing reducers
Service Scope: Standard product supply, custom solutions, technical consulting, model selection support, and after-sales maintenance
Industries Served: Construction machinery, solar tracking systems, cranes, port machinery, automation equipment, special-purpose vehicles, etc.