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Product Overview
STL-56J Self-Propelled Telescopic Boom Lift for 58 m Working Height
Onchtech STL-56J is a self-propelled rough-terrain telescopic boom lift with a 58 m maximum working height, 24.4 m horizontal outreach, and up to 480 kg platform capacity. Featuring Cummins power and 4WD/4WS, it supports wind turbine maintenance, bridge inspection, and ultra-high construction work. OEM/ODM customization is available.
- Platform Capacity
- 300 kg / 480 kg
- Maximum Horizontal Outreach
- 24.4 m / 21 m
- Gradeability
- 40%
- Maximum Platform Height
- 56 m
- Power and Drive
- Cummins, 4WD × 4WS
- Maximum Working Height
- 58 m
Core Advantages
Ultra-High Access
Long-Reach Coverage
Rough-Terrain Mobility
High-Elevation Stability
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Product Parameters
| Dimensions | Performance | ||
|---|---|---|---|
| Max Working Height | 58m | Load Capacity | 300kg/480kg |
| Max Platform Height | 56m | Max Occupants | 2 |
| Max Horizontal Reach | 24.4m/21m | Travel Speed (Stowed) | 4.4km/h |
| Length – Stowed [D] | 14.9m | Travel Speed (Raised) | 1.1km/h |
| Width – Stowed [E] | 2.49m | Gradeability (Stowed) | 40% |
| Height – Stowed [C] | 3.15m | Inside Turning Radius (Extended) | 2.69m |
| Platform Size [A×B] | 2.44m*0.91m | Inside Turning Radius (Stowed) | 7.6m |
| Wheelbase [F] | 5.6m | Outside Turning Radius (Extended) | 7.07m |
| Ground Clearance [G] | 0.38m | Outside Turning Radius (Stowed) | 10m |
| Turntable Tail Swing | 2.5m | ||
| Max Allowable Tilt Angle | 5° | ||
| Turntable Rotation | 360° | ||
| Tires | 445/50D710 | ||
| Max Ground Noise Level | ≤82dBA | ||
| Power | Weight | ||
| Power Source | Cummins | Standard Weight | 27500kg |
| Fuel Tank Capacity | 200L | ||
| Drive / Steering | 4WD*4WS | ||
Product Details
ONCHTECH HIGH-REACH ACCESS PLATFORM
STL-56J Electric Rough Terrain Telescopic Boom Lift
The Onchtech STL-56J is a 56 m platform-height, self-propelled telescopic boom lift developed for extreme high-reach outdoor access work. Positioned as a pure-electric rough-terrain boom lift, it is intended for projects where elevated access, long horizontal reach, and lower-noise operation are important considerations. The machine is suited to contractors, equipment fleets, wind-service teams, and infrastructure project buyers working on large structures where personnel, tools, and maintenance materials must be brought close to an elevated work area without relying on fixed access systems.
High-Reach Working Capability
58 m
Maximum working height
The maximum working height supports access to elevated inspection, installation, and repair points on major structures and high-rise construction zones.
56 m
Maximum platform height
Platform height identifies the elevation of the working basket itself, helping buyers assess direct access to the required task level.
24.4 m
Maximum horizontal outreach
The telescopic boom reaches outward to approach work faces such as bridge cables, wind-turbine components, and elevated structural edges.
480 kg
Rated platform capacity
The rated load capacity allows the platform to carry personnel together with task-specific tools or materials, subject to site operating procedures.
Electric Drive and Rough-Terrain Chassis Design
Pure-electric operating concept
The STL-56J is introduced as an electric boom lift for high-reach work where reduced operating noise and lower-carbon equipment selection are relevant to the project environment.
X-type expanding-axle chassis
The X-type expanding-axle chassis is designed to provide a broad working foundation for demanding high-reach applications on outdoor project sites.
Dual-reduction turntable structure
A dual-reduction turntable arrangement supports the structural requirements of boom positioning during long-reach work, particularly where torsional loading is a selection concern.
Configuration note: For project planning, buyers should confirm the final powertrain and site-specific configuration with Onchtech before procurement.
Application Scenarios
Wind turbine service
Used for blade repair and inspection on large onshore wind turbines, where 58 m working height and 24.4 m outreach help approach elevated service locations.
Bridge cable inspection
Suitable for close-access examination of external cables and structural elements on long-span bridges, including precision non-destructive inspection tasks.
Landmark construction
Supports high-level installation, finishing, and maintenance operations on major public infrastructure and landmark construction projects.
Large outdoor structures
Applies to elevated work on structures that require a self-propelled rough-terrain telescopic boom lift rather than ground-based access equipment.
Suitable Customers and Selection Considerations
Who it is for
The STL-56J is relevant to access-equipment rental fleets, wind-energy maintenance contractors, bridge inspection teams, infrastructure builders, and project procurement organizations handling ultra-high outdoor work.
Key selection inputs
Confirm required platform height, horizontal outreach, platform load, ground conditions, available site access, operating schedule, and local requirements before choosing the machine configuration.
OEM and project configuration
Backed by Hunan Hongchang Machinery Co., Ltd., Onchtech can discuss OEM, ODM, and branding requirements for B2B equipment cooperation.
To assess fit for a specific project, provide Onchtech with the target working height, outreach requirement, platform load, jobsite surface conditions, access route, and intended application.
Hunan Hongchang Machinery Co., Ltd.
Full-Chain Smart Manufacturing; Full-Scope Engineering
Company Profile
50,000+ m²
Building area
20+ countries and regions
Product and service coverage
Within 1 hour
Customer response
100+
Global customers
Manufacturing & Partnership Capabilities
OEM / ODM / OBM customization
Supports customization of complete machine configuration, structure, brand, and product development to meet the needs of different markets and channels.
R&D and manufacturing system
Capable of collaborative development of complete machines, hydraulics, power systems, and structural components, supporting continuous product development and iteration.
Global delivery and service
Provides product delivery, technical support, spare parts, and after-sales service for global markets.
Emission adaptation for global markets
Covers emission standards such as China Stage II, China Stage III, China Stage IV, Euro V, and EPA, and supports power and emission configurations for different countries and regions.
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- Rapid Response
- Professional selection
- Customization support