K21-30
The K21-30 combines compact design with impressive performance. Despite its low dead weight of only 3.5 tons, the trailer crane impresses as a versatile all-rounder on any construction site. The particularly powerful folding jib allows for loads of up to 1,500 kg. Its lateral reach with a weight of 250 kg is an impressive 21 m.
The single-axle operation ensures maximum maneuverability, optimal weight distribution, and additional ground clearance – ideal for tight and demanding locations. Thanks to the integrated self-drive system, the crane can be maneuvered comfortably and precisely on the construction site.
For use in inner-city areas, the retractable drawbar offers another advantage: it reduces the total length to just 7 m, allowing for quick and space-saving setup.
Features
Drive variant:
Support
- Fully hydraulic support with ASC support monitoring enables continuously variable support widths – also in the discharge direction
- Maximum flexibility in the setup for optimal use of space and load-bearing capacity
- massive L-shaped outrigger form for maximum tipping stability
- Outriggers without sub-construction thanks to long, vertical cylinders
Automatic setup
- faster and easier setup of the crane via radio remote control
- continuous lateral extension of each individual outrigger
- Automatic leveling of the support cylinders for optimal construction even on uneven surfaces
- Permanent pressure monitoring automatically adapts to changing external conditions
double luffing cylinders
- torsion-resistant lifting of the boom thanks to two luffing cylinders
- double cylinders for double safety
- Improved reception of lateral guides for a more stable and calmer stand of the boom
endlessly rotatable
- high-quality slewing ring from German brand manufacturing
- The well-designed rotation mechanism allows for endless rotation of the upper carriage in both directions
Self-propelled drive
- Operation of the hydraulic self-drive system via the standard remote control
- easy and precise maneuvering in confined spaces
retractable drawbar
- Reduction of the total length from 9.25 m to 7.00 m
- allows setup even with limited space
Mast system
- extremely strong and weather-resistant special aluminum alloy with low dead weight
- No loss of strength in the weld seam thanks to friction stir welding – the joints are as tight as the solid material
- Klaas' typical hole pattern reduces wind attack surfaces, minimizes dead weight, and ensures high buckling stiffness
- Movable cables are integrated into the mast and therefore optimally protected
- low-maintenance hydraulic piping eliminates the need for complex hydraulic hose changes
Folding pointed joint
- The joint plate is milled „from a solid material“, thus enabling higher load capacities
- Electronic monitoring in the joint guarantees optimal load absorption in every angular position
- Double folding pointed cylinders for additional safety and protection against lateral forces
Telescopic winch
- Rapid telescoping under load thanks to patented Klaas rope technology
- Integrated electronic length measurement records the current mast extension length and calculates the maximum possible load capacity
- low dead weight of the ropes increases outreach and load capacity
- low-maintenance and easily accessible rope technology
Diesel-powered trailer cranes
- powerful diesel engine for reliable crane operation
- fuel-efficient for reduced operating costs and lower environmental impact
- electronic tank monitoring with display of fill levels on the crane and via the remote control
Crane control
- complex control system according to EN 280 and EN 13000
- modern safety PLC for reliable crane operation
- CAN-BUS control block for precise and sensitive work
- smooth start-stop for low-vibration work
- optionally expandable with additional remote control
Radio remote control
- precise and sensitive control through high-quality joysticks
- Clear display of the most important operating conditions such as tilt and rotation angles, max. Lifting force, lifting rope speed
- high operating comfort and safe control during crane operation
- optionally with memory function for saving and automatically starting defined target points (hold-to-run)
- flexible power supply via standard batteries or cable
Accessory Fix System
- Accessories safely stored and ready at any time
- no annoying lashing necessary
- custom-fit brackets ensure safety in road traffic
- Equipment of the crane with individually desired brackets
GPS tracking opt.
- Trackunit's tracking system captures important machine and operational data such as usage, maintenance, and battery status.
- Remote fault analysis by Klaas service staff to reduce downtime
- Support with billing, logistics and efficient equipment rental
- easier location of equipment in case of theft
Technical data
| Load | Range | Height |
|---|---|---|
| 1,500 kg | 4.5 m | 22 m |
| 1,000 kg | 8 m | 20.8 m |
| 800 kg | 9.5 m | 24.5 m |
| 500 kg | 14 m | 24 m |
| 250 kg | 21 m | 17.5 m |
| Parameter | Value |
|---|---|
| Hook load (stat./opt.) | 1,500 kg - |
| Hook height | 29.00 m |
| Extraction length | 30.80 m |
| Outrigger spread (min.) | 2.86 m |
| Outrigger spread (max.) | 5.05 m |
| Wind pulling force | 1,500 kg |
| Boom (1,500 kg) | 5.46 m |
| Extension 1 (800 kg) | 9.12 m |
| Vehicle dimensions | 9.22 x 2.29 x 2.50 m |
| Towing capacity | 3.50 t |
Load diagrams
Crane operation
