A mobile spider crane is a compact tracked lifting machine designed for jobs where ordinary cranes cannot fit. It typically handles loads from 3 to 8 tonnes and works indoors, on rooftops, or in narrow alleys. The machine gets its name from the outriggers that extend like spider legs, providing a stable base even on uneven ground. If you need a lifting solution for confined construction sites, glass installation, or plant maintenance, contact YG Machinery for a quote.
Technical Parameter for YG Small Spider Crane
| Model | YG-3 | YG-5 | YG-8 |
| Specification | 3t | 5t | 8t |
| Maximum working radius | 8.83m × 0.15t | 14m × 0.5t | 16.5m |
| Maximum above-ground head | 9.9m × 0.7t | 16.8m | 18m |
| Winch device-Hook speed | 0-8m/min (4 rope) | 12m/min (4 rope) | 12m/min (4 rope) |
| Winch device-Rope diameter | φ8mm × 45m | φ11mm × 80m | φ11mm × 80m |
| Telescopic system-Boom type | 5-section, pentagonal | 5-section, pentagonal | 5-section, pentagonal |
| Boom length/time | 3.1m-9.2m/20sec | 12.3m / 54sec | 12.3m / 54sec |
| Boom angle/time | 0°~78° / 13sec | 0°~78° / 13sec | 0°~78° / 13sec |
| Slew angle/speed | 0-360° continuous / 60sec | 0-360°continuous / 38sec | 0-360°continuous / 38sec |
| Walking drive | Hydraulic motor | Hydraulic motor | Hydraulic motor |
| Walking speed | 0~2.5km/h | 0~2.5km/h | 0~2.5km/h |
| Grade ability | (25°) 36% | (25°) 36% | (25°) 36% |
| L × W × H (mm) | 2950 × 980 × 1560 | 5000 × 1500×1900 | 5000 × 1600×2180 |
| Total weight (kg) | 2700 | 6200 | 7200 |
How a Mill spider crane works – simple hydraulic logic?
A hydraulic pump driven by a diesel or electric motor sends oil to four circuits: boom extension, boom lift, winch, and travel. Each circuit has its own control valve. Push the remote lever for lifting, and oil turns the winch drum. For boom extension, oil goes to a telescopic cylinder inside the pentagonal sections. Steering is done by running the left and right track motors at different speeds. The outriggers operate independently – press a button, each leg extends horizontally, then vertically to lift the tracks off the ground, creating a stable platform that can self-level on slopes up to 25 degrees. All movements have proportional control: pull gently for slow motion, pull fully for maximum speed.
Key Advantages of Mobile Spider Crane
Compact transport dimensions
The YG-3 measures only 2950 mm long, 980 mm wide, and 1560 mm high. It fits in a standard cargo van or on a small trailer. No special transport permit required.
Low ground pressure
Rubber tracks spread the weight so well that the crane can roll across marble floors, hospital lobbies, or newly poured concrete without leaving a mark.
Wireless remote control as standard
The operator stands exactly where the load needs to go, not stuck inside a cab. This cuts signal time and improves safety, especially when placing loads near fragile structures.
Quick setup
Outriggers extend and level the machine in under one minute. No tools, no cribbing, no crane operator license required in many jurisdictions for models under 3 tonnes.
One machine replaces multiple methods
Instead of renting a boom lift for access plus a hoist for lifting, one mobile spider crane does both. It lifts, reaches, and travels. That means lower rental costs and fewer people on site.
Tracked Mini Crane, VS Wheeled Crane
1. Lower ground pressure
Rubber tracks spread the machine’s weight over a much larger area than wheels. You can drive it on finished floors, through hospital corridors, or across a lawn without damage. Wheels would sink into soft ground or scratch delicate surfaces. Tracks also climb stairs step by step using hydraulic drive – something no wheeled mini crane can do.
2. Better side stability
The wide track base and extendable outriggers make the machine nearly impossible to tip sideways. Even with the boom fully extended and rotated 90 degrees, the spider legs keep everything safe. A wheeled mobile spider crane has much wider outriggers or heavy counterweights to achieve the same stability.
3. Ability to drive with a load
YG’s tracked mini crane can move while carrying about 30% of its rated load. That is enough to shift a heavy object a few meters without resetting the rigging. On a crowded site, this saves many re hook operations. Wheeled mini cranes typically cannot move at all with a suspended load.
What are mini spider cranes used for?
- Indoor construction and renovation: The machine fits through standard doorways and works on finished floors without damage. It lifts steel beams, HVAC units, and heavy equipment inside malls, factories, and office buildings.
- Rooftop work: Ordinary cranes cannot reach rooftops in dense cities. A small spider crane goes up by the service elevator or gets lifted by a larger crane, then places solar panels, chillers, or antenna towers safely.
- Bridge inspection and repair: The crane sets up on the bridge deck or a suspended platform. It lowers tools and materials to workers underneath, and the outriggers adjust to uneven surfaces.
- Underground and tunnel projects: Many utility tunnels are less than two meters wide. The tracked mini crane drives through, then lifts valves, pumps, or piping sections that weigh several tonnes – no manual chain hoists needed.
- Glass and curtain wall installation on high-rise buildings: The crane sits on a balcony or temporary steel frame. It reaches up or down with precision, holding glass panels steady while glaziers bolt them in place.
- Plant maintenance: Inside chemical plants or power stations, floor space is tight, and overhead cranes are not always available. The machine moves between reactors and exchangers, lifting motors, gearboxes, and pump casings for repair.
Mini Crawler Crane for Sale – YG Machinery
YG Machinery is an integrated industrial and trading enterprise specializing in mini crawler crane production and research. Every unit is full-load tested before shipping, with international hydraulic components, high-strength boom steel, a one-year warranty, and spare parts in stock. Need a mobile spider crane for indoor maintenance, roof work, or bridge inspection? Contact YG Machinery with your max lift weight and narrowest passage. We will recommend the right model and send a price within 24 hours.
