Swing Arm for EV Charging Stations
BESSUN Swing Arms are EV charging cable management systems designed to support and counterbalance heavy charging cables, helping reduce cable sagging, twisting and handling effort while improving the charging experience.
See the Swing Arm in Action
See how the BESSUN Swing Arm supports and guides heavy DC charging cables during operation, allowing the cable to follow the user’s movement while reducing handling effort and unnecessary contact with the ground.
Why Use a Swing Arm?
DC fast charging cables are often heavy, thick, and difficult to handle, particularly in high-power charging applications. Without proper cable management, cables may drag on the ground, become twisted, or be exposed to damage from passing vehicles.
BESSUN Swing Arms provide a practical cable management solution by supporting and guiding charging cables during operation, helping improve safety, usability, and cable protection.
Support Heavy Charging Cables
Counterbalances the weight of heavy EV charging cables for easier handling.
Reduce Cable Dragging
Helps keep more of the cable off the ground during operation and storage.
Reduce Bending & Twisting
Allows cable to move naturally during charging, reducing unnecessary bending and twisting.
Improve Cable Handling
Reduces effort to move and position cables.
Choose Your Swing Arm
The BSM-SA Series includes multiple configurations to suit different charging stations and installation requirements.
The models share the same basic purpose—supporting and managing heavy EV charging cables—but differ in arm structure, connection design, appearance and working configuration.
BSM-SA1
Standard Swing Arm for general DC charging cable management.
BSM-SA2
3-Fold Swing Arm for installations where a compact folding configuration is important.
BSM-SA4
With the integrated housing, it delivers a sleek and elegant appearance for seamless charger integration.
BSM-SA5
Swing Arm with an integrated cable retractor for greater cable movement and reach.
BSM-SA3
Heavy-Duty Swing Arm with a dedicated cable connection and cable clamp system.
| Parameter | BSM-SA1 | BSM-SA2 | BSM-SA4 | BSM-SA5 | BSM-SA3 |
|---|---|---|---|---|---|
| Working Load | 30 kg | 15 kg | 30 kg | 30 kg | 30 kg |
| Max. Load | 80 kg @ 600 mm | 30 kg @ 600 mm | 80 kg @ 600 mm | 80 kg @ 600 mm | 80 kg @ 600 mm |
| Main Arm | 600 mm | 380 mm | 600 mm | 600 mm | 600 mm |
| Second Arm | 300 mm | 300 mm | 300 mm | — | 300 mm |
| Third Arm | — | 200 mm | — | — | — |
| Connection Options | Soft / Hard | Soft / Hard | Soft / Hard | Soft | Soft / Hard (SA3-specific) |
Working Load refers to the recommended load under normal operating conditions. Max. Load refers to the specified maximum load under defined test conditions.
Engineered for Demanding Charging Environments
BESSUN Swing Arms combine robust construction, smooth operation, and flexible configurations to meet the demands of modern DC charging stations.
Robust Construction
Durable aluminum alloy construction for demanding charging environments.
Smooth Operation
Adjustable spring tension for easier cable handling and movement.
Corrosion Resistance
Corrosion-resistant materials and surface treatments for outdoor applications.
Long Service Life
Designed for repeated operation, with endurance testing to validate mechanical durability.
Custom Housing for Charger Integration
We go beyond standard solutions. We can design and manufacture custom housing covers tailored specifically to your charging station’s aesthetic and branding requirements, ensuring a seamless, high-end look that perfectly aligns with your corporate identity.
Example shown: housing-integrated swing arm design.
Connection Options
BESSUN Swing Arms are available with Soft Connection and Hard Connection options.
The appropriate connection depends on the charging cable, required cable movement and installation configuration.
Standard Connection System
BSM-SA1 / SA2 / SA4 support Soft or Hard Connection. BSM-SA5 supports Soft Connection only.
BSM-SA3 Dedicated System
Use the BSM-SA3-specific connection and clamp components as a matched assembly.
Soft Connection
Flexible attachment allows more relative movement and helps reduce direct mechanical stress.
Soft Connection
Flexible attachment using the dedicated BSM-SA3 connection structure.
Hard Connection
Direct cable attachment provides more controlled movement at the connection point.
Hard Connection
Direct attachment using the dedicated BSM-SA3 cable clamp structure.
Optional Buffer
An optional buffer helps control the Swing Arm’s return movement, reducing recoil impact and mechanical shock for a smoother operating experience.
It is particularly useful when the Swing Arm is installed at an angle.
Buffer selection depends on the Swing Arm configuration and application requirements.
WHERE IT WORKS
BESSUN Swing Arms are trusted by charging station manufacturers and operators worldwide, helping to keep charging cables organized, safe and easy to handle.
Public DC Fast Charging
Supports heavy charging cables at public fast charging stations during frequent use.
Fleet & Depot Charging
Suitable for locations with frequent charging operations and repeated cable handling.
Bus & Truck Charging
Provides cable support for heavier charging applications.
Highway Charging Stations
Helps manage cables at high-power locations with frequent public use.
Commercial & Industrial
Suitable for robust cable-management applications.
Retrofit Applications
Can be evaluated for existing charging stations where a suitable mounting solution is available.
Explore our Retrofit Cable Management Solutions for DC Fast Chargers.
Installation & Maintenance
Installation Requirements
- Reinforce the top mounting area to prevent deformation under operational load.
- Use sheet metal thickness ≥ 5.0 mm, or structural reinforcement ribs beneath the mounting panel.
- Mounting interface: 4 × Ø9 mm through-holes for M8 fasteners.
- Allow full arm movement clearance from surrounding equipment and structures.
Care & Maintenance
- Do not use unauthorized components or modify the assembly.
- Avoid repeated no-load impact tests.
- Minimize additional torque transferred from the charging cable.
- No routine greasing is required under normal operating conditions.
- Inspect fasteners every six months or to the local maintenance schedule.
Testing & Validation
Load Testing
Evaluation of arm structure under specified loading conditions.
Endurance Testing
Repeated operating cycles to evaluate mechanical durability.
Temperature Testing
Evaluation under defined high- and low-temperature conditions.
Corrosion Testing
Evaluation of corrosion resistance for metal parts and surface treatments.
Need Detailed Technical Data or Drawings?
To help us recommend the right Swing Arm configuration and initial retraction force, please provide:
- Cable length
- Cable diameter
- Cable weight
- Cable routing / outlet position
Based on this information, we can recommend a suitable Swing Arm configuration and connection arrangement for your application.
FAQ
Which model should I choose?
Start with cable weight, diameter and length, then review mounting position and working range. Select the arm, connection and clamp as an assembly.
What is the working load?
| Model | Working Load |
|---|---|
| BSM-SA1 | 30 kg |
| BSM-SA2 | 15 kg |
| BSM-SA3 | 30 kg |
| BSM-SA4 | 30 kg |
| BSM-SA5 |
Swing Arm: 30 kg Cable Retractor: 12 kg |
Is the 30 kg working load suitable for heavy EV charging cables?
In many applications, yes. As a reference, a 7 m DC charging cable with a diameter of approximately 43 mm and a weight of up to 20 kg is within the 30 kg working load of BSM-SA1, BSM-SA3, BSM-SA4 and the Swing Arm section of BSM-SA5.
However, cable suitability should not be determined by weight alone. Cable length, diameter, flexibility, routing, mounting position and required working range should also be considered. For project evaluation, please provide the cable specifications and installation details.
What is your maximum load? What does “Max. load @ 600 mm” mean?
“Max. Load @ 600 mm” refers to the maximum load applied to the Swing Arm when the load point is 600 mm from the mounting axis. It is different from the recommended working load for normal operation.
| Model | Max. Load @ 600 mm |
|---|---|
| BSM-SA1 | 80 kg |
| BSM-SA2 | 30 kg |
| BSM-SA3 | 80 kg |
| BSM-SA4 | 80 kg |
| BSM-SA5 | 80 kg (Swing Arm) |
Note: For BSM-SA5, the maximum load shown above refers to the Swing Arm.
The integrated Cable Retractor has a capacity of 12 kg.
Does the Swing Arm meet corrosion resistance requirements?
Yes. All BESSUN Swing Arm models (BSM-SA1, BSM-SA2, BSM-SA3, BSM-SA4 and BSM-SA5) have been tested in a neutral salt spray (NSS) chamber. The tested samples completed 240 hours of salt spray exposure without red rust.
What endurance tests have been done on the cable management system?
1）Endurance at room temperature
Q: What is the endurance test at room temperature?
A: While the design requirement is 50,000 cycles, our internal testing confirms stable operation for up to 100,000 cycles under the rated working load: 30 kg for BSM-SA1, BSM-SA3, BSM-SA4 and BSM-SA5, and 15 kg for BSM-SA2.
2）Endurance at +50 °C@90% relative humidity
Q: What test has been performed?
A: Static load test
- +50 °C, 24 hours, 80 kg@600mm, no breakage.
Q: Does this fulfill the 50,000-cycle requirement at +50 °C@90% RH?
A: No, only static testing has been done; cycling test not yet performed.
Q: Can you perform the 50,000-cycle test at +50 °C@90% RH?
A: Currently not, as a very large climatic chamber is required.
We kindly ask if this test can be carried out in your test laboratory.
3）Endurance at -40 °C
Q: What test has been performed?
A: Static load test at:
- -40 °C, 24 hours, 80 kg@600mm, no breakage.
Q: Does this fulfill the 50,000-cycle requirement at -40 °C?
A: No, only static testing has been done; cycling test not yet performed.
Q: Can you perform the 50,000-cycle test at -40 °C?
A: We currently cannot perform this cycling test.
We kindly ask if this endurance test can be carried out in your test laboratory.
What is your MOQ?
No MOQ. The sample lead time is 10 ~ 12 days.
What information should I provide when sending an inquiry?
To ensure we provide the best possible solution, it would be great to receive the following information:
- Cable Length
- Cable Diameter
- Total Cable Weight
What is the difference between BSM-SA1 and BSM-SA3? They look similar.
BSM-SA1 is our standard Swing Arm and is suitable for most EV charging station applications.
BSM-SA3 is a heavy-duty Swing Arm with a more robust structure, making it more suitable for larger DC fast charging stations. It is recommended for charging station cabinets with a depth of ≥ 800 mm.
Both models have a maximum load of 80 kg @ 600 mm.
Can I have a custom length and/or colour?
Yes. The Swing Arm can be customized to suit different charging station designs and installation requirements.
The main arm length can be customized from 200 mm to 1,000 mm, with 600 mm as the standard length. Custom colours are also available to match the charging station design or branding requirements.
Please contact us with your required arm length, colour and project details for evaluation.
Can we have a housing as a complete set?
Yes, we can design and produce a housing for you based on your EV charging station specifications. However, given the shipping costs, we would suggest that you manufacture it locally (at your end).
Can I only order the cable clamps?
Yes. Please let us know the diameter of your charging cable.
Is a Buffer Essential for a Swing Arm?
A buffer isn’t absolutely essential for a swing arm, but it’s highly recommended. However, using one helps reduce wear on the retractor mechanism and minimizes the risk of damage to the charging station over time.
Could you please share the advantages and disadvantages of hard and soft connections?
Soft connection: Absorbs and accommodates pulling forces, helping reduce shock loads, but may allow more sway or movement at the cable end.
Hard connection: Provides better positional control and minimizes sway, but transmits pulling forces more directly through the arm and connection point.
Can I retrofit an existing installation?
Retrofit suitability depends on the mounting structure, equipment interface and available clearance. Please send an installation drawing or site photographs for review.
What is the difference between BSM-SA1 and BSM-SA4?
BSM-SA1 and BSM-SA4 have similar load capacities, but they differ mainly in their external design.
BSM-SA1 has an exposed-arm design and is our standard Swing Arm solution.
BSM-SA4 features an integrated housing that covers the arm structure, providing a cleaner and more integrated appearance for the charging station.
Both models have a 30 kg working load and a maximum load of 80 kg @ 600 mm.
Related Resources
Learn how cable length, outlet position and working range can help determine the appropriate Swing Arm configuration.
Check out the Design Recommendations for Accessible Electric Vehicle Charging Stations by the U.S. Access Board for expert guidance on creating inclusive and accessible charging solutions.