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Product Description
JMD Air Hoists Low Headroom Series(3~20t)
Product Introduction:
The JMD Air Hoists Low Headroom Series (3–20t) is a specialized pneumatic lifting solution engineered for facilities where vertical space is at a premium. Unlike standard hoists that require substantial clearance between the runway beam and the hook, the JMD series features an ultra-compact, low-profile design that minimizes the headroom dimension—allowing the hook to travel closer to the overhead rail and maximizing the usable lifting height within confined working environments.
With a load capacity spanning 3 to 20 metric tons, this series delivers robust lifting performance in a remarkably small package, making it the preferred choice for low-ceiling workshops, below-deck shipyard operations, underground mining galleries, and containerized handling stations.
Key Features:
1.Ultra-Compact Low Headroom Design
The defining feature of the JMD series is its exceptionally short hook-to-beam distance. By integrating the air motor, gear train, and drum assembly into a flattened, space-saving configuration, the JMD hoist reduces overall height by up to 30–40% compared to conventional air hoists. This translates directly into additional inches or feet of vertical lifting travel—a critical advantage in height-restricted facilities.
2.Full Pneumatic Power – Zero Spark Risk
Like all JMD family products, the Low Headroom series operates entirely on compressed air, containing no electrical components. This ensures intrinsic safety in explosive atmospheres, including coal mines with methane presence, petrochemical plants, paint booths, and grain processing facilities. No electrical sparks, no overheating, no ignition sources.
3.Smooth, Precise Load Handling
Equipped with a high-efficiency vane-type air motor and precision-machined planetary gears, the JMD series offers infinitely variable speed control. Operators can smoothly transition from a delicate creep speed for precision alignment to full-speed lifting for rapid cycle times—all with fingertip pendant or remote control.
4.Integrated Trolley or Fixed Mount Options
Available in both trolley-mounted (for traversing along overhead beams) and fixed-suspension (for stationary lifting points) configurations, the JMD series adapts to diverse installation requirements. The trolley version features low-profile wheel assemblies that maintain the overall compactness while delivering smooth horizontal movement.
5.Built for Harsh Conditions
Constructed with high-strength alloy steel and protected with anti-corrosion coatings, the JMD series withstands dust, moisture, temperature extremes (-20°C to +55°C), and aggressive industrial atmospheres. Sealed air motors and exhaust silencers minimize noise while preventing contaminant ingress.
Outline Dimensions(JMD10-4) :
Outline Dimensions(JMY20-4) :
| Model | JMD3-3 | JMD6-2 | JMD10-4 | JMD12-4 | JMD16-3 | JMD20-4 | |
| b Track Width Range | mm | 110~146 | 200~250 | 200~300 | |||
| A | mm | 115 | 168 | ||||
| Bmax | mm | 231 | 326 | 372 | |||
| C | mm | 162 | 168 | 320 | |||
| ΦD | mm | 134 | 165 | 185 | |||
| E | mm | 428 | 1007 | 1302 | 1398 | ||
| F | mm | 196 | 597 | 688 | 725 | ||
| G | mm | 162 | 198 | 230 | |||
| Hmin | mm | 600 | 550 | 727 | 750 | ||
| J | mm | 225 | 236 | 370 | |||
| K | mm | 203 | 335 | 394 | |||
| N | mm | 200 | 397 | 655 | 810 | ||
| M | mm | 45 | 50 | 56 | |||
| Φ | mm | 56 | 63 | 71 | |||
Technical Parameters:
| Model | JMD3-3 | JMD6-2 | JMD10-4 | JMD12-4 | JMD16-3 | JMD20-4 | ||
| Duty Classification | M3 | |||||||
| Lifting Capacity | t | 3 | 6 | 10 | 12 | 16 | 20 | |
| Working Pressure | bar(kg/cm²) | 6 | ||||||
| Hoist Mechanism | Lifting Height | m | 3 | |||||
| Number of Chain Falls | 3 | 2 | 4 | 3 | 4 | |||
| Motor Output Power | kw | 0.75 | 3.5 | |||||
| Full-load Lifting Speed | m/min | 1.3 | 1.8 | 1 | 0.8 | 0.55 | ||
| Full-load Lowering Speed | m/min | 3 | 5 | 2 | 1.6 | 1.2 | ||
| Air Consumption | m³/min | 1.5 | 5.5 | |||||
| Air Inlet Connection | in | Rc1/2 | Rc3/4 | |||||
| Air Hose Size (I.D.) | mm | 12 | 25 | |||||
| Chain Size寸 | mm | 7×21 | 13×36 | 16×45 | ||||
| Control Hose Length | m | 3 | ||||||
| Full-load Lifting Noise Level | db | 77 | 79 | |||||
| Full-load Lowering Noise Level | db | 79 | 80 | |||||
| Trolley Travel Mechanism | Motor Output Power | kw | 0.25 | 2×0.25 | 0.7 | |||
| Full-load Travel Speed | m/min | 8~9 | 5 | |||||
| Air Consumption | m³/min | 0.6 | 2×0.6 | 1.3 | ||||
| Air Inlet Connection | in | Rc1/4 | Rcl/2 | |||||
| Air Hose Size (I.D.) | mm | 8 | 12 | |||||
| Trolley Weight | kg | 50 | 100 | 150 | 250 | |||
| Total Weight | kg | 100 | 250 | 330 | 350 | 520 | 580 | |
| Notes: 1.The control hose length is configured based on the standard lifting height of 3m. 2.The total weight is calculated based on a lifting height of 3m. 3.For details or any special requirements, please contact our sales engineers. | ||||||||
Reliable Safety Systems:
*Mechanical load brake: Automatically engages upon air pressure loss, preventing load drift
*Overload protection: Prevents operation beyond rated capacity
*Low-pressure cut-off: Hoist locks if supply pressure drops below safe operating threshold
*Emergency stop valve: Instant air supply shut-off
*Chain/rope guide: Prevents twisting and ensures smooth spooling
Typical Applications:
*Low-ceiling workshops and factory retrofits
*Shipbuilding – below-deck and compartment lifting
*Underground mining and tunneling operations
*Container stuffing and unpacking stations
*Maintenance pits and service bays
*Railway rolling stock repair depots
*Food processing and cold storage facilities
*Any height-restricted indoor or outdoor lifting point
