Centered on "heavy-load safety + labor-saving durability + power-free universality", the YD30-013 Series HSZ Type Chain Block is optimized to address core pain points in power-free heavy-load lifting scenarios. Its core advantages are as follows:
Compared with traditional single-bearing chain blocks, this series adopts a double-bearing design:
- Significant Labor-Saving Effect: Transmission resistance is reduced by 30%, and lifting efficiency is increased by 25%. Taking the 2T model as an example, when lifting a 3T test load, the operating force is only 314N (equivalent to lifting a 32kg object), which can be easily pulled by one person;
- Less Wear: Bearings evenly distribute radial force, reducing wear at the gear meshing area by 40%. The transmission mechanism remains smooth after long-term use, and its service life is extended to 1.5 times that of ordinary products.
As a core load-bearing component, the chain has three major advantages:
- Strong Load-Bearing Capacity: The breaking strength of Grade 80 alloy material is much higher than that of ordinary chains. The 5T model chain can withstand a 7.5T test load without deformation, suitable for industrial heavy-load needs;
- Excellent Rust Resistance: Double rust-proof treatment of hot-dip galvanizing + passivation. Even when used in humid workshops or rainy outdoor environments, there is no rust accumulation during long-term storage, and frequent rust removal and maintenance are not required;
- Smooth Meshing: Chain pitch accuracy ≤0.1mm, which matches the sprocket tooth grooves precisely. There is no risk of chain jamming or jumping during lifting, and the operation feel is smoother.
The built-in ratchet-pawl brake has an instant braking function:
- During lifting or lowering, as long as the hand chain is released, the brake locks the heavy object instantly. Even if the hand chain breaks accidentally, it can prevent the heavy object from falling. For example, when lifting a 10T device, if you pause to adjust the lifting point halfway, the device can stay suspended stably without any sliding;
- The brake system has passed 1,000 heavy-load start-stop tests, and the braking performance does not deteriorate, meeting the needs of high-frequency and high-load industrial operations.
- Anti-Detachment Hook: Both upper and lower hooks are equipped with automatically resetting safety latches, with a latch opening angle ≤60°. When the heavy object shakes, the latch always fits the hook to prevent the chain or sling from detaching. The root of the hook is reinforced, increasing impact resistance by 50% to avoid overload breakage;
- Lightweight Design: The 0.5T model has a net weight of only 8kg and can be carried in a toolbox for easy access during workshop maintenance. Although the 20T model has a high load capacity, it adopts a modular split design, which is easy to transport to narrow construction spaces (such as elevator shafts and equipment gaps).
- Workshop/Warehouse: Dust-resistant and oil-resistant. After daily use, just wipe the surface with a rag, no complicated cleaning required;
- Outdoor/Construction: The chain is rust-proof and the hook is corrosion-resistant. After short-term rain or mud contact, it can be restored to use by rinsing with clean water, suitable for outdoor scenarios such as construction sites and bridge maintenance;
- High/Low Temperature Environments: Within the working temperature range of -20℃-60℃, the performance of the brake system and chain does not deteriorate. The chain does not become brittle at low temperatures, and the handle does not soften at high temperatures, suitable for full-temperature operation needs.
- Simple Daily Maintenance: After every 50 uses, only lithium-based grease needs to be added to the gear meshing area and bearings. No complex disassembly is required, and non-professionals can also complete it;
- Individual Component Replacement: Core components such as chains, hooks, and brakes can be purchased and replaced individually without overall scrapping. For example, after the chain is worn, only the chain assembly needs to be replaced, greatly reducing maintenance costs.
Scenario Requirement: A machinery factory needs to lift a 5T machine spindle out of the equipment cavity (lifting height 2.5m) for maintenance. The workshop has a temporary power outage, no electric hoisting equipment is available, and the working space is narrow (only 1.5m wide).
Operation Process:
- Suspension Fixation: Select the YD30-013-5T model, hang the upper hook on the fixed lifting point at the top of the workshop, and check if the safety latch is reset;
- Heavy Object Connection: Hang the lower hook on the special sling for the spindle, adjust the chain length to ensure the spindle is stressed horizontally and avoid tilting and colliding with the inner wall of the equipment;
- Lifting Operation: One person pulls the hand chain to lift the spindle slowly. The double-bearing transmission reduces the operating force to only 383N, requiring no effort. After lifting to the target height, release the hand chain, and the brake system locks the spindle, allowing maintenance personnel to disassemble the spindle safely.
Result: Replacing the traditional "6-person lifting + crowbar assistance", the number of operators is reduced by 70%, and the lifting time is shortened from 1 hour to 20 minutes, suitable for emergency maintenance scenarios during power outages.
Scenario Requirement: A construction site needs to hoist an 8T steel bundle from the ground to a 10m-high construction platform (lifting height 3m). There is no municipal power at the construction site, and the ground is uneven, so large cranes cannot be used.
Operation Process:
- Bracket Fixation: Select the YD30-013-10T model, hang the upper hook on a mobile tripod (load-bearing ≥15T), fix the tripod on a flat ground and take anti-slip measures;
- Material Hoisting: Hang the lower hook on the special lifting net for the steel bundle, pull the hand chain to lift the steel. The 4-chain line design distributes the load, ensuring a stable lifting process without shaking;
- High-Altitude Positioning: After the steel reaches the height of the construction platform, release the hand chain to lock the brake. Construction personnel fine-tune the position and slowly lower the steel to the platform to avoid collision with the scaffolding.
Result: No need to rent diesel cranes, reducing the single hoisting cost by 80%. Two people can complete the operation, and it works continuously for 1 month in dusty outdoor environments without faults.
Scenario Requirement: A large warehouse needs to move a 15T heavy shelf from the ground to a 3m-high shelf layer; outdoor rescue requires lifting a 5T trapped off-road vehicle out of a 1.5m-deep gully (no power available).
Operation Process:
- Warehouse Handling: Select the YD30-013-20T model, hang the upper hook on the warehouse crane, bind the shelf with the lower hook, lift the shelf with 8 chain lines. The brake system ensures stable suspension and accurate placement on the target shelf layer;
- Outdoor Rescue: Select the YD30-013-5T model, hang the upper hook on the special lifting point of the rescue vehicle, connect the lower hook to the vehicle tow ring, and pull the hand chain to lift the vehicle out of the gully. The rust-proof chain is suitable for muddy environments.
Result: Warehouse handling efficiency is increased by 80%, avoiding shelf deformation caused by manual handling; outdoor rescue can pull the vehicle out of the gully within 30 minutes without relying on electric rescue equipment.
A1: Choose based on the three dimensions of "load + height + scenario":
- Load Matching: Select a model with a rated load 20% higher than the actual load (e.g., for lifting a 5T heavy object, the 5T model can be selected, which has a test load of 7.5T and reserves sufficient safety margin);
- Height Adaptation: Models 0.5T-1.5T have a lifting height of 2.5m, and models 2T-20T have a lifting height of 3m. If a higher height (e.g., 5m) is needed, customized extended chains can be ordered (the chain length must be noted in advance);
- Scenario Adjustment: Choose models 0.5T-2T (excellent portability) for lightweight maintenance, models 3T-20T (strong load-bearing capacity) for industrial heavy loads, and prioritize galvanized chain models for outdoor scenarios to enhance rust resistance.
A2: It is mostly an operation or maintenance issue, not an equipment fault:
- Chain Entanglement: If the chain overlaps or skews on the sprocket, first pull the hand chain slowly in the reverse direction to disengage the chain from the sprocket, then straighten the chain and ensure it meshes precisely with the sprocket tooth grooves before lifting again;
- Insufficient Lubrication: Lack of oil at the gear-chain meshing area can cause chain jamming. Add lithium-based grease (Model Li-2) to the meshing area, and pull the hand chain 3-5 times to restore smoothness. Maintenance is recommended every 30 uses.
A3: The effect can be restored by adjusting the brake clearance, following these steps:
- Ensure the heavy object is placed stably, remove the brake end cover, and loosen the brake spring fixing nut;
- Rotate the adjustment bolt clockwise (1/4 turn each time) to reduce the brake clearance. Test the braking effect after each adjustment until the heavy object is completely locked when the hand chain is released;
- Tighten the fixing nut and reinstall the end cover. If the brake pad wear is ≥1mm, replace it with a new one (original accessories can be purchased separately).
A4: The chain will not become brittle and the brake will not fail. Two preparations are required for low-temperature use:
- Chain Protection: Grade 80 alloy chains maintain good toughness at -25℃ and will not become brittle when bent. If the chain surface is frozen, thaw it with warm water before use to avoid chain jamming caused by freezing;
- Brake Protection: The brake grease is a low-temperature type resistant to -30℃, which does not solidify at low temperatures and has stable braking performance. Before use, pull the hand chain empty 10-15 times to preheat the components using frictional heat and improve operation smoothness.
Jiaxing Yeeda International Co.,Ltd
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